When cooling down a steam boiler that has been taken out of service, a vent valve on the steam drum should be opened to

When cooling down a steam boiler that has been taken out of service, a vent valve on the steam drum should be opened to

a) prevent a vacuum from forming in the boiler
b) release the air from the boiler
c) purge the shell of impure gases
d) let the operator know when the pressure has reached zero
e) prevent pressure build-up in the boiler

Answer: A

On boiler cool-down the vent should be opened

On boiler cool-down the vent should be opened

a) as soon as the post-purge is completed
b) when all temperatures are at ambient value
c) any time after the NRV is closed
d) just before the unit goes into a vacuum
e) at no time

Answer: D

Before removing a boiler from service for maintenance purposes it is beneficial to

Before removing a boiler from service for maintenance purposes it is beneficial to

a) inform the Chief Inspector
b) do as little as possible with the waterside of the unit
c) use sootblowers and clean the fireside well
d) force cool the unit with post-purge air
e) drain the unit before the water cools to ambient temperature

Answer: C

Two boilers are feeding into the same steam header and each pressure gage shows a pressure of 350 kPa. The steam pressure gage on the header will indicate

Two boilers are feeding into the same steam header and each pressure gage shows a pressure of 350 kPa. The steam pressure gage on the header will indicate

a) slightly more than 350 kPa
b) 700 kPa
c) slightly more than 700 kPa
d) slightly less than 350 kPa
e) slightly less than 700 kPa

Answer: D

When raising pressure in a firetube boiler you should: 1. raise steam slowly 2. raise steam as rapidly as possible 3. check the furnace frequently 4. check the system for leaks

When raising pressure in a firetube boiler you should:
1. raise steam slowly
2. raise steam as rapidly as possible
3. check the furnace frequently
4. check the system for leaks

a) 2, 3, 4
b) 1, 2, 3, 4
c) 1, 3, 4
d) 1, 2, 3
e) 2, 4

Answer: C

While a boiler is warming up it is good practice to

While a boiler is warming up it is good practice to

a) leave all drain valves closed
b) check the low water fuel cut-off device for proper operation
c) test the safety valve before any pressure develops
d) not interfere in any way with the combustion process
e) go through a sootblowing operation sequence

Answer: B

A boiler warm-up should

A boiler warm-up should

a) be done as quickly as possible
b) be done with low water so that metal heats up faster
c) be done slowly to minimize any differential expansion
d) be completed with a high firing rate
e) not involve any human intervention

Answer: C

When igniting a gas or oil fired boiler you should ignite from: 1. another burner already in service 2. the hot refractory 3. a hand torch 4. an electrical igniter

When igniting a gas or oil fired boiler you should ignite from:
1. another burner already in service
2. the hot refractory
3. a hand torch
4. an electrical igniter

a) 1, 2
b) 1, 3
c) 2, 3
d) 1, 2, 4
e) 3, 4

Answer: E

A boiler furnace pre-purge

A boiler furnace pre-purge

a) is the shortest step in the start-up sequence
b) can take place normally even if there is a low water condition
c) must be done manually on a fully automatic boiler
d) must last a specific amount of time
e) will take place at the end of a boiler shutdown

Answer: D

Superheater vents are usually opened before firing a boiler to

Superheater vents are usually opened before firing a boiler to

a) allow the superheater to warm up quicker
b) let the first steam produced act as a superheater coolant
c) ensure drum level does not drop
d) verify the operation of the steam flow transmitter
e) enhance boiler water circulation

Answer: B

On a boiler fuel system having a double block and bleed set-up

On a boiler fuel system having a double block and bleed set-up

a) the vent valve is a normally open valve
b) at least one of the main-line valves will always be open
c) the main-line valves will open before the prepurge stage
d) the main-line and vent valves all open together
e) the main-line valves are manually operated

Answer: A

Boiler dry-out means

Boiler dry-out means

a) drying out the top and bottom drum
b) igniting the dryers in the top drum
c) drying out the new refractory
d) empty the boiler out
e) drying out the entire boiler before start-up

Answer: C

Boiler boiling out procedure should be done

Boiler boiling out procedure should be done

a) at operating pressure
b) before the dry out procedure
c) at one-half the operating pressure
d) once a year
e) just before the annual inspection

Answer: C

Before lighting up a boiler you should: 1) purge the furnace 2) open the blow down valve 3) check the fuel supply 4) fill the boiler with water

Before lighting up a boiler you should:
1) purge the furnace
2) open the blow down valve
3) check the fuel supply
4) fill the boiler with water

a) 1, 2, 4
b) 2, 3, 4
c) 1, 2, 3, 4
d) 1, 3, 4
e) 2, 3

Answer: D

If a new boiler is not properly boiled out, it may result in

If a new boiler is not properly boiled out, it may result in

a) tubes rupturing
b) a furnace explosion
c) nuisance shutdowns
d) an unwanted high rate of water circulation
e) a foaming condition occurring

Answer: E

The first duty of the operator coming on shift is to

The first duty of the operator coming on shift is to

a) check the safety valve settings
b) fill out the log book
c) check that water column and gage glass connections are clear
d) talk to his supervisor
e) check the chemical tank levels

Answer: C

A boiler inspection

A boiler inspection

a) must be done after every shut down of the boiler
b) must be done when the boiler inspector requests it
c) must be done every two years
d) is done with the owner's permission only
e) must be done before the boiler is ready for start-up

Answer: B

The external inspection of a boiler

The external inspection of a boiler

a) may include making sure the valves are in good operating condition
b) may include making sure the furnace refractory is in order
c) may include making sure the tubes are free of scale
d) must be done after the boiler has been drained
e) may include making sure the exterior of the tubes are in good condition

Answer: A

New refractory must be thoroughly and properly cured with a light fire because

New refractory must be thoroughly and properly cured with a light fire because

a) of its high rate of differential expansion
b) it may burn if not cured
c) it may corrode if not cured
d) it contains moisture which can cause it to fracture if not cured
e) of the length of time it takes it to heat up

Answer: D

Before starting up any boiler it is necessary that

Before starting up any boiler it is necessary that

a) it be properly warmed up
b) it be properly purged
c) it have a valid inspection certificate
d) the water supply system be in service
e) the waterside is boiled out

Answer: C

The "deductive approach" and the "inductive approach" are means of achieving this type of paragraph development.

The "deductive approach" and the "inductive approach" are means of achieving this type of paragraph development.

A) Chronological
B) Spatial
C) Comparison and contrast
D) Reason and examples
E) Process

Answer: D

"Also", "nevertheless", and "consequently" are all examples of what type of cohesion device?

"Also", "nevertheless", and "consequently" are all examples of what type of cohesion device?

A) parallel structure
B) transition expressions
C) pronouns
D) repetitive links
E) supporting words

Answer: B

What do transitional expressions, pronouns, and parallel structure all help achieve in a paragraph?

What do transitional expressions, pronouns, and parallel structure all help achieve in a paragraph?

A) unity
B) conciseness
C) RENNS
D) coherence
E) spatial order

Answer: D

Paragraph development involving similarities and differences between objects, people or ideas is:

Paragraph development involving similarities and differences between objects, people or ideas is:

A) deductive
B) process
C) comparison and contrast
D) inductive
E) reasons and examples

Answer: C

The five methods of paragraph development are:

The five methods of paragraph development are:

A) spatial, comparison, process, reasons, and chronological
B) contrast, examples, process, comparison, and reasons
C) process, reasons & examples, contrast & comparison, spatial, and chronological
D) renns, reasons, process, comparison, and contrast
E) deductive, inductive, process, introductory, and spatial

Answer: C

An acronym used in paragraph development is:

An acronym used in paragraph development is:

A) NFPA
B) CAODC
C) TOPIC
D) SCOPE
E) RENNS

Answer: E

A paragraph development pattern, which may be illustrated by a diamond shape, will have:

A paragraph development pattern, which may be illustrated by a diamond shape, will have:

A) a large number of sentences
B) spatial content
C) a chronological development pattern
D) cellular content
E) a clincher sentence

Answer: E

Customarily, all good paragraphs have a:

Customarily, all good paragraphs have a:

A) clincher sentence
B) topic sentence
C) spatial opening
D) introductory paragraph
E) summary sentence

Answer: B

When the topic sentence is composed of a generalization or premise that is supported by specific information that follows, the paragraph development pattern is referred to as

When the topic sentence is composed of a generalization or premise that is supported by specific information that follows, the paragraph development pattern is referred to as

a) spatial
b) chronological
c) deductive approach
d) process

Answer: C

When writing a paragraph on how to make or do something, the development is called

When writing a paragraph on how to make or do something, the development is called

a) parallel structure
b) spatial
c) coherence
d) process development

Answer: D

______ is not a means used to achieve coherence.

______ is not a means used to achieve coherence.

a) Parallel structure
b) Pronouns
c) Transitional expressions
d) Digression

Answer: D

One difference between an essay and a technical report is

One difference between an essay and a technical report is

a) very few readers will read the complete report
b) essays tend to have a greater variety of readers
c) authoring a report is easier than authoring an essay
d) the essay has much more specific detail

Answer: A

When paragraph sentences all relate to the same key idea, the paragraph has

When paragraph sentences all relate to the same key idea, the paragraph has

a) unity
b) a sound structure
c) a parallel structure
d) coherence

Answer: A

Customarily, all good paragraphs have a ____ sentence.

Customarily, all good paragraphs have a ____ sentence.

a) concluding
b) key
c) chronological
d) spatial

Answer: B

Control of the immersion heater boiler is done by turning on and off the ______ supply to one or more elements as required.

Control of the immersion heater boiler is done by turning on and off the ______ supply to one or more elements as required.

a) water
b) power
c) steam
d) amperage
e) current

Answer: B

The immersion heater boiler has its elements arranged

The immersion heater boiler has its elements arranged

a) as isolated units in the steam space
b) equally spaced in the steam space
c) outside the boiler shell to provide easy access for maintenance
d) for operation in sequence on the underside of the shell
e) as groups of elements submerged in the water space

Answer: E

Control of the immersion heater boiler is done by

Control of the immersion heater boiler is done by

a) transforming the voltage to a lower value
b) turning the power on and off to the elements as required
c) a float switch
d) increasing and decreasing water flow
e) recirculating boiler water

Answer: B

There are two general designs of electric boilers. They are the

There are two general designs of electric boilers. They are the

a) firetube type and water tube type
b) AC and DC type
c) electrode and immersion type
d) grounded and ungrounded type
e) reverse polarity and negative ground

Answer: C

Immersion boiler tube bundles

Immersion boiler tube bundles

a) act to conduct current through the water
b) can be easily removed from the unit for maintenance purposes
c) cannot be used to regulate steaming capacity
d) have very low electrical resistance
e) operate at only one voltage

Answer: B

An immersion electric boiler capacity can be as high as

An immersion electric boiler capacity can be as high as

a) 1,500 kW
b) 2,100 kW
c) 30,000 kW
d) 16,000 kW
e) 5,000 kW

Answer: A

A __________ is not required on an electrode electric type boiler.

A __________ is not required on an electrode electric type boiler.

a) safety valve
b) gauge glass
c) blow-off valve
d) low water cut-off
e) pressure gauge

Answer: D

One disadvantage of an electric boiler is that it

One disadvantage of an electric boiler is that it

a) requires alternating current
b) requires DC power
c) has no chimney
d) is not very efficient
e) is very expensive to operate

Answer: E

The amount of current passed through the water of an electrode boiler depends on

The amount of current passed through the water of an electrode boiler depends on

a) the depth of the electrodes in the water
b) the control valve setting
c) the steam pressure in the boiler
d) the water quality
e) the water temperature

Answer: A

The steam produced by an electrode type boiler depends on

The steam produced by an electrode type boiler depends on

a) the voltage supplied to the elements
b) the level of water in the basket
c) the number of heating elements engaged
d) the number of baffles
e) the amperage supplied to the elements

Answer: B

The electrode type boiler

The electrode type boiler

a) cannot have a varying load
b) must operate at very constant pressure
c) utilizes bundles of electric elements
d) requires water which conducts electricity
e) will produce hydrogen by electrolysis of water

Answer: D

Electrode boiler capacities can be as high as

Electrode boiler capacities can be as high as

a) 16,000 kW
b) 30,000 kW
c) 1,200 kPa
d) 1,200 kW
e) 30,000 kPa

Answer: B

Operating voltage for an electrode boiler may be as high as

Operating voltage for an electrode boiler may be as high as

a) 30,000 volts
b) 16,000 volts
c) 5,000 volts
d) 550 volts
e) 240 volts

Answer: B

A boiler which incorporates a basket and a basket drain valve is the

A boiler which incorporates a basket and a basket drain valve is the

a) steam generator
b) immersion boiler
c) Sterling boiler
d) electrode boiler
e) thermal flood boiler

Answer: D

Most electric boilers are limited in pressure to about 2100 kPa due to the effect of high temperature on the

Most electric boilers are limited in pressure to about 2100 kPa due to the effect of high temperature on the

a) steam space
b) submerged area
c) boiler fittings
d) vessel structure
e) elements or electrodes

Answer: E

An advantage of an electric boiler is that it

An advantage of an electric boiler is that it

a) is silent in operation
b) can rapidly produce steam
c) can produce steam at very high pressures
d) requires only one blow-off valve
e) does not require a sight glass

Answer: A

An advantage of an electric boiler is, that it

An advantage of an electric boiler is, that it

a) has a high steaming rate
b) can be operated at high pressures and temperatures
c) produces very dry steam
d) has a high efficiency of energy transfer from the electricity to the boiler water
e) does not require an operator

Answer: D

A main disadvantage of an electric boiler is

A main disadvantage of an electric boiler is

a) they are not very compact
b) furnace refractory tends to be high maintenance item
c) vibration requires special footings
d) input energy cost is high
e) energy transfer efficiency is low

Answer: D

Electric boilers

Electric boilers

a) require tall stacks for pollution dispersal
b) tend not to be very compact
c) require sootblowers when fuel is coal
d) have energy conversion efficiencies close to 100%
e) are not as safe as other boilers

Answer: D

The quick opening blow-off valve should be placed

The quick opening blow-off valve should be placed

a) at the second blowdown tank
b) second from the boiler
c) furthest from the boiler
d) between the boiler and the check valve
e) nearest to the boiler

Answer: E

The blow down system has two valves; they should be opened and closed in the correct sequence to

The blow down system has two valves; they should be opened and closed in the correct sequence to

a) carry out the blow down accurately
b) prevent excessive blow down
c) prevent a high level in the steam drum
d) prevent the boiler losing level
e) protect the valve closest to the boiler

Answer: E

A boiler blow down system is equipped with slow and fast opening valves. The quick opening valve is placed

A boiler blow down system is equipped with slow and fast opening valves. The quick opening valve is placed

a) closest to the boiler and opened first
b) furthest from the boiler and opened first
c) closest to the boiler and opened last
d) furthest from the boiler and opened last
e) on the blow off tank

Answer: A

The preferred arrangement of valves on a boiler blow-off line is

The preferred arrangement of valves on a boiler blow-off line is

a) two quick-opening valves
b) a slow-opening valve closest to the boiler followed by a quick-opening
c) a quick-opening valve closest to the boiler followed by a slow-opening
d) one valve only (It must be a globe valve.)
e) a quick opening valve and a lift check valve

Answer: C

When two seatless valves are used for intermittent blowdown, the operation sequence is

When two seatless valves are used for intermittent blowdown, the operation sequence is

a) open the downstream valve first and close it last
b) open the upstream valve first and close it last
c) open the downstream valve first and close it first
d) open the upstream valve first and close it first
e) open the upstream valve last and close it last

Answer: A

Water leaving a blowdown tank and entering a sewer must not exceed

Water leaving a blowdown tank and entering a sewer must not exceed

a) 45 degrees C
b) 50 degrees C
c) 75 degrees C
d) 65 degrees C
e) 80 degrees C

Answer: D

A blowdown tank will

A blowdown tank will

a) have to be cleaned monthly to remove the collected sludge
b) not be classed as a pressure vessel since it is vented
c) lower the temperature and pressure of the incoming boiler water
d) not have to have any specific capacity or volume
e) be allowed to accommodate only one boiler

Answer: C

Boiler water having the greatest concentration of suspended solids is found

Boiler water having the greatest concentration of suspended solids is found

a) just below the steam drum water line
b) in the bottom of the mud drum
c) at the bottom of the steam drum
d) in waterwall riser tubes
e) in convection zone downcomer tubes

Answer: B

A blow off tank is used to

A blow off tank is used to

a) lower the dissolved solids in the water
b) lower the pH of the water
c) prevent damage to the sewer
d) keep the condensate hot
e) to prevent sludge from entering the boiler

Answer: C

According to the Alberta Boilers Act Regulations, what fitting is needed between the blow-off valve and the boiler if two boilers use the same blow-off tank?

According to the Alberta Boilers Act Regulations, what fitting is needed between the blow-off valve and the boiler if two boilers use the same blow-off tank?

a) a non-return valve
b) a steam trap
c) a steam separator
d) an expansion joint
e) a check valve

Answer: E

According to the CSA B-51 code a blow-off tank is necessary to

According to the CSA B-51 code a blow-off tank is necessary to

a) prevent high temperature and pressure in the sewer
b) prevent blowing off too quickly
c) remove sludge from blow-off water
d) prevent overflowing the sewer
e) reduce the boiler water velocity

Answer: A

A "rule of thumb" rate of continuous blowdown is approximately

A "rule of thumb" rate of continuous blowdown is approximately

a) 10% of steaming rate
b) 5% of steaming rate
c) 15% of steaming rate
d) 1% of steaming rate
e) 3% of steaming rate

Answer: D

Boiler water having the highest Total Dissolved Solids (TDS) content is found

Boiler water having the highest Total Dissolved Solids (TDS) content is found

a) at the bottom of the mud drum
b) at the bottom of the steam drum
c) at the top of the steam drum
d) in the waterwall tubes
e) just below the waterline of the steam drum

Answer: E

If dissolved solids are not removed from boiler water the result may be

If dissolved solids are not removed from boiler water the result may be

a) overheating of convection zone tubes
b) foaming and carry-over
c) overheating of radiant zone tubes
d) steam which will be more saturated with latent heat
e) purer steam leaving the steam drum

Answer: B

The continuous boiler water blowdown is used

The continuous boiler water blowdown is used

a) in place of the main blowdown
b) in addition to the main blowdown
c) to adjust the drum water level
d) to introduce chemicals to the boiler
e) to control the bottom blowdown

Answer: B

A steam boiler is blown down in order to

A steam boiler is blown down in order to

a) clean the soot and carbon out of the firebox and tubes
b) lower the operating water level in the boiler
c) discharge sediment and scale forming matter from the boiler
d) test the rated relieving capacity of the safety valves fitted to the boiler
e) locate the steam level

Answer: C

Blowdown guidelines can be found in

Blowdown guidelines can be found in

a) ASME Section VII
b) ASME Section VIII
c) CSA B51
d) CSA B52
e) applicable provincial Acts and Regulations

Answer: A

An external treatment method which minimizes blowdown is

An external treatment method which minimizes blowdown is

a) sodium zeolite softening
b) deaeration
c) coagulators
d) demineralization
e) sludge conditioning

Answer: D

The type of blowdown system used on a boiler is usually a function of

The type of blowdown system used on a boiler is usually a function of

a) the type of internal water treatment used
b) the type of external water treatment used
c) the temperature at which the boiler operates
d) how long the boiler operates each day
e) water supply temperatures

Answer: B

Pressure explosions occur when a pressure part of the boiler such as the shell, furnace, or firetube bursts due to too high a steam pressure or a structural weakening of the metal. This weakening may be caused by:

Pressure explosions occur when a pressure part of the boiler such as the shell, furnace, or firetube bursts due to too high a steam pressure or a structural weakening of the metal. This weakening may be caused by:

1. corrosion
2. thermal stress
3. overheating
4. scale and sludge build-up
5. insufficient combustion air



a) 1, 3, 4, 5
b) 2, 3, 4, 5
c) 1, 2, 3, 4
d) 1, 2, 4, 5
e) 1, 2, 3, 5

Answer: A

Attempting to light a burner __________ may cause a furnace explosion.

Attempting to light a burner __________ may cause a furnace explosion.

a) from hot refractory
b) without preheating the fuel
c) without first cooling the fuel
d) without a pilot light
e) by pre-purging the furnace

Answer: A

Failure to __________ the furnace thoroughly before light-up can cause a furnace explosion.

Failure to __________ the furnace thoroughly before light-up can cause a furnace explosion.

a) heat
b) drain
c) prime
d) cool
e) purge

Answer: E

Poor combustion due to the insufficient amount of ______ may cause a furnace explosion.

Poor combustion due to the insufficient amount of ______ may cause a furnace explosion.

a) gas
b) fuel
c) heat
d) air
e) hydrocarbons

Answer: D

If the main burner fails, this could cause

If the main burner fails, this could cause

a) the steam atomizing pressure to increase
b) admission of unburned fuel to the furnace which may explode
c) the boiler efficiency to increase
d) the fuel valve to stay open
e) the pilot light to go out

Answer: B

Attempting to light one burner from another burner during the operation, can

Attempting to light one burner from another burner during the operation, can

a) cause the lit burner to be blown out
b) cause the fuel oil in the supply tank to surge
c) put the ignitor out
d) not cause the furnace to explode
e) cause a furnace explosion

Answer: E

One cause of flame failure in oil or gas fired boilers is

One cause of flame failure in oil or gas fired boilers is

a) excessive fuel temperature
b) fuel pressure being too high
c) the fuel being too volatile
d) water in the fuel
e) the hydrogen content is too low

Answer: D

The purging process for a furnace should be done

The purging process for a furnace should be done

a) before each burner is lit
b) with the fuel valve closed
c) with the fuel valve in the open position
d) before the second burner is lit
e) with the pilot light on

Answer: B

When additional gas burners are required, they may be ignited

When additional gas burners are required, they may be ignited

a) from an adjacent burner
b) by the flame detector
c) by means of a transformer relay
d) by a flame rod
e) by means of a torch

Answer: E

Most furnace explosions occur

Most furnace explosions occur

a) during the lighting up of a boiler burner
b) during the shutting down of a burner
c) during the purge period of lighting a boiler furnace
d) during the period of increasing the load
e) when steam pressure is excessive

Answer: A

The best method of ensuring adequate attention is being given to the boiler and its controlling and safety devices is to

The best method of ensuring adequate attention is being given to the boiler and its controlling and safety devices is to

a) schedule regular testing and checking procedures
b) maintain a log book showing testing results and by whom they were done
c) request staff to perform checks weekly
d) have faith in the personnel
e) always maintain good oral communication lines about tests and checks

Answer: B

A reason for many boiler accidents may be due to

A reason for many boiler accidents may be due to

a) inadequate training of operating personnel
b) log books being kept up to date and adequate
c) the regular testing and checking of control devices
d) not asking the insurance companies to inspect boilers more often
e) safety valves being oversized

Answer: A

A boiler pressure or waterside explosion

A boiler pressure or waterside explosion

a) could be the result of water in the fuel oil
b) could be the result of inadequate ignition
c) may be caused by a low water condition
d) could result from improper sootblowing procedures
e) could be the result of broken refractory

Answer: C

A firetube boiler furnace explosion

A firetube boiler furnace explosion

a) can be the result of too much scale on boiler tubes
b) is more disastrous than a pressure or waterside explosion
c) may be the result of oil in the water causing a foaming condition
d) may result from a flame scanner not working properly
e) could be caused by poor water circulation

Answer: D

What causes the level in the gauge glass to be lower than the water level in the boiler?

What causes the level in the gauge glass to be lower than the water level in the boiler?

a) steam valve on the gauge glass closed
b) shrinkage in the boiler steam drum
c) drain valve on the gauge glass leaking
d) top try cock open
e) the steam pressure is excessively high

Answer: C

What causes the level in the gage glass to be higher than in the drum?

What causes the level in the gage glass to be higher than in the drum?

a) column drain valve leaking
b) steam valve on the gage glass closed
c) swell in boiler steam drum
d) starting up of the stand-by feedwater pump
e) gauge glass steam and water valves are both open

Answer: B

If the boiler safety valves open during boiler operation, you should

If the boiler safety valves open during boiler operation, you should

a) close the non-return valve on the boiler drum
b) shut the boiler down immediately
c) increase the forced draft flow to cool the boiler
d) open the blowdown valves
e) reduce the fuel and air flow to the boiler

Answer: E

If the safety valve on a boiler pops and the only pressure gauge indicates well below pop pressure, you would

If the safety valve on a boiler pops and the only pressure gauge indicates well below pop pressure, you would

a) notify the Boiler Inspector
b) reduce boiler pressure and get the gauge checked
c) shut down to fix the safety valve
d) increase spring pressure on safety valve
e) shut down the boiler and replace the safety valve and gauge glass

Answer: B

When you first notice that the water level in the boiler gauge glass can no longer be seen, it is best first to

When you first notice that the water level in the boiler gauge glass can no longer be seen, it is best first to

a) ensure that the boiler is not over filled
b) start the stand-by feed pump or injector
c) shut off the boiler fuel supply
d) close the main steam valve
e) ensure the glass is not leaking

Answer: A

In the event of a flame failure, an automatic boiler will close the fuel valve and usually

In the event of a flame failure, an automatic boiler will close the fuel valve and usually

a) begin a re-start cycle immediately
b) perform a post-purge
c) reset itself
d) simply restart itself with no human intervention
e) stop the boiler feedpump

Answer: B

A high water level in a boiler

A high water level in a boiler

a) will not be made worse by dropping boiler pressure or allowing "swell" to occur
b) should cause a high water level shutdown switch to stop the fire
c) is usually the result of a boiler feedpump malfunction
d) will necessitate an immediate shutdown, cool down, and inspection
e) is usually the result of a level control malfunction

Answer: E

In the event of a low water condition in a boiler the engineer in charge should

In the event of a low water condition in a boiler the engineer in charge should

a) shut down the burner immediately
b) continue firing and restore the level
c) shut down the burner, let the unit cool, then inspect it
d) shut down the burner, let the unit cool, then restore level
e) notify the Chief Engineer before responding to the condition

Answer: C

While blowing down a boiler which is in operation, you should

While blowing down a boiler which is in operation, you should

a) check the rest of the boiler room equipment
b) fill in the log book for your shift
c) concentrate only on blowing down the boiler
d) clean up the area close to the boiler
e) add more water to the boiler to replace the blow down water

Answer: C

When performing a sootblowing operation it is important to maintain flame stability and

When performing a sootblowing operation it is important to maintain flame stability and

a) ensure drum water level remains constant
b) firing rate not be allowed to increase
c) stack discharge not become visible
d) dislodged soot and ash leave the boiler with the flue gases
e) the local environmental agency be notified prior to blowing

Answer: D

A natural gas fired power boiler flame should be

A natural gas fired power boiler flame should be

a) very slow, long, and mostly yellow or orange
b) fairly rapid, mostly blue, and some orange
c) very rapid, short, very audible, and have no orange
d) very white and intense, requiring coloured glass for viewing
e) bright enough to require coloured glass for viewing

Answer: B

A wide and rapid fluctuating water level in the boiler gage glass may be the result of

A wide and rapid fluctuating water level in the boiler gage glass may be the result of

a) high TDS
b) a vapour bound boiler feed pump
c) low alkalinity
d) low pH
e) boiler firing rate being too low

Answer: A

Soot and ash are undesirable on tube surfaces because they

Soot and ash are undesirable on tube surfaces because they

a) increase heat transfer through the heating surfaces
b) cause overheating of the tubes
c) reduce boiler efficiency
d) reduce draft for power requirements
e) reduce the heating surface of the boiler

Answer: C

Shot cleaning pellets are transported to the top of the boiler

Shot cleaning pellets are transported to the top of the boiler

a) by using an air stream
b) manually
c) in a steam injection system
d) by a hydraulic hoisting system
e) and are not recycled

Answer: A

Shot cleaning pellets have a diameter of approximately

Shot cleaning pellets have a diameter of approximately

a) 2 cm
b) 6 cm
c) 0.6 cm
d) 0.6 mm
e) 2 mm

Answer: C

A stationary sootblower

A stationary sootblower

a) has two opposing nozzles at the end of its lance
b) has a row of nozzles throughout the lance length
c) does not rotate while blowing
d) is cooled by air while not in use
e) is cooled by water while not in use

Answer: B

While a steam sootblower is in operation it is cooled by

While a steam sootblower is in operation it is cooled by

a) air
b) flue gases
c) steam
d) water
e) none of the above

Answer: C

During a sootblowing operation the boiler firing rate should be at least

During a sootblowing operation the boiler firing rate should be at least

a) 15%
b) 30%
c) 20%
d) 80%
e) 70%

Answer: B

A long retractable sootblower will

A long retractable sootblower will

a) have nozzles throughout its full length
b) be used to clean furnace walls
c) blow during extension and retraction as it rotates
d) not blow until fully extended
e) require less exterior room than a furnace wall unit

Answer: C

A furnace wall sootblower sequence of operation is

A furnace wall sootblower sequence of operation is

a) rotate & blow, extend, retract
b) extend, blow, retract, rotate
c) rotate, extend, blow, retract
d) extend, rotate & blow, retract
e) retract, blow, rotate, extend

Answer: D

The steam used for sootblowing is usually

The steam used for sootblowing is usually

a) greater than boiler drum pressure
b) wet unsaturated steam
c) the same as boiler drum pressure
d) superheated at the sootblower nozzle
e) mixed with compressed air

Answer: D

In addition to reducing heat transfer, soot and ash on fireside tubes also

In addition to reducing heat transfer, soot and ash on fireside tubes also

a) lessens the chance of furnace explosions
b) increases draft fan power
c) results in the formation of CO in the flue gases
d) raises superheater temperatures
e) results in smoke emissions from the stack

Answer: B

The chemical injection line is located

The chemical injection line is located

a) near the normal water level
b) close to the CBD line
c) in the steam space
d) near the internal feed pipe
e) close to the riser tubes

Answer: D

Chemicals are injected into the boiler to

Chemicals are injected into the boiler to

a) prevent corrosion
b) keep sludge dispersed
c) prevent sludge
d) prevent scale
e) all the above

Answer: E

Some smaller boilers have a pipe and baffle device in the steam drum which acts as

Some smaller boilers have a pipe and baffle device in the steam drum which acts as

a) a separator
b) a chemical injection device
c) a scrubber
d) a drip collector baffle
e) an internal feed pipe

Answer: E

A drum internal which acts to reduce thermal shock and turbulence is the

A drum internal which acts to reduce thermal shock and turbulence is the

a) cyclone separator
b) drip-collector baffle
c) corrugated plate drier
d) internal feed pipe
e) chevron drier

Answer: D

The CBD valve is usually a

The CBD valve is usually a

a) gate valve with a metering device
b) ball valve with a metering device
c) stop/check valve with a metering device
d) butterfly valve with a metering device
e) needle valve with a metering device

Answer: E

Relative to steam drum internals, a boiler water test is conducted to

Relative to steam drum internals, a boiler water test is conducted to

a) ensure scrubbers have not corroded away
b) adjust or set the continuous blowdown valve (CBD)
c) ensure the water is not attacking the separators
d) inform us when maintenance is required on drum equipment
e) ensure chemicals are entering the boiler

Answer: B

Cyclone separators are used to

Cyclone separators are used to

a) separate water droplets from the steam
b) accelerate the steam leaving the boiler
c) heat the steam coming out of the drum
d) separate impurities from the water
e) separate water from the steam drum

Answer: A

Steam separation in a modern boiler usually occurs in

Steam separation in a modern boiler usually occurs in

a) 1 step
b) 2 steps
c) 3 steps
d) 4 steps
e) 5 steps

Answer: C

At lower pressures, steam

At lower pressures, steam

a) has higher densities
b) is more difficult to separate from the water
c) readily rises and separates from the water
d) cannot be separated from water with mechanical devices
e) requires large volume spaces in order to separate

Answer: C

A boiler steam drum will

A boiler steam drum will

a) allow load increases to be accomplished more quickly
b) always be the highest component of a boiler
c) not distribute feedwater to cold sections of the boiler
d) have no bearing or effect on water circulation
e) contain a steam space which will be at higher pressure than the water space

Answer: A

The component of a boiler which allows a space for the introduction of chemicals is the

The component of a boiler which allows a space for the introduction of chemicals is the

a) mud drum
b) steam drum
c) injection tank
d) internal feed pipe
e) deaerator

Answer: B

The advantages of a packaged boiler are:

The advantages of a packaged boiler are:

1. lower freight costs because of less handling
2. lower initial cost because they are mass produced
3. quality control is easier to implement
4. the boilers can be factory tested before being sent to the customer
5. it requires little time to put the unit into operation at the plant site



a) 1, 3
b) 2, 5
c) 2, 3, 4
d) 1, 2, 3, 4, 5
e) 2, 3, 4, 5

Answer: D

When the hot combustion gases travel through boiler tubes which are surrounded by the boiler water, the boiler is called a

When the hot combustion gases travel through boiler tubes which are surrounded by the boiler water, the boiler is called a

a) watertube boiler
b) tubular boiler
c) packaged boiler
d) coil type boiler
e) firetube boiler

Answer: E

A firetube boiler is one which has

A firetube boiler is one which has

a) water on the inside of the tubes and the hot gas of combustion on the outside.
b) the furnace as the first pass of the burner flame.
c) water on the outside of the tubes and hot water on the inside of the tubes.
d) water on the outside of the tubes and the hot gas on the inside of the tubes.
e) internally fired tubes surrounded by water.

Answer: D

A boiler which is built ready for installation is the

A boiler which is built ready for installation is the

a) Scotch marine boiler
b) firebox boiler
c) HRT boiler
d) packaged boiler
e) locomotive boiler

Answer: D

In a packaged firetube boiler the flue gas velocity within the unit is maintained by

In a packaged firetube boiler the flue gas velocity within the unit is maintained by

a) increasing forced draft fan speed
b) constructing a taller stack
c) varying the firetube lengths
d) varying the total cross-sectional area of the fire tubes in each pass
e) decreasing forced draft fan speed

Answer: D

The wetback Scotch boiler was designed primarily for

The wetback Scotch boiler was designed primarily for

a) building heating service
b) marine service
c) traction engine service
d) railway service
e) very high capacity electrical generation

Answer: B

A corrugated furnace will give required strength with thinner metal, increase heating surface, and

A corrugated furnace will give required strength with thinner metal, increase heating surface, and

a) increase the boiler mass
b) add to the overall material cost of the unit
c) decrease combustion turbulence
d) will necessitate the boiler being made longer
e) allow for differential expansion and contraction

Answer: E

The firebox boiler is a __________ pass firetube boiler.

The firebox boiler is a __________ pass firetube boiler.

a) single
b) two
c) three
d) vertical
e) horizontal

Answer: B

A major disadvantage of a firebox is

A major disadvantage of a firebox is

a) first cost is relatively high
b) it has a low heat transfer efficiency
c) it is not very compact
d) cleaning and inspection can be difficult
e) it has only one flue gas pass

Answer: D

A boiler which utilized a water leg and was primarily used for heating purposes was the

A boiler which utilized a water leg and was primarily used for heating purposes was the

a) HRT boiler
b) locomotive boiler
c) firebox boiler
d) Scotch boiler
e) marine boiler

Answer: C

A component used to increase the volume of the steam space in a locomotive boiler was the

A component used to increase the volume of the steam space in a locomotive boiler was the

a) crown sheet
b) steam leg
c) shell head
d) dry pipe
e) steam dome

Answer: E

An advantage of a locomotive boiler over other boilers of the era was

An advantage of a locomotive boiler over other boilers of the era was

a) rugged construction
b) better cleaning and repair access
c) improved water circulation
d) less stays were required
e) lower maintenance costs

Answer: A

With regard to a steam boiler, the lettering "HRT" means

With regard to a steam boiler, the lettering "HRT" means

a) highly regulated temperature
b) hot return tubes
c) horizontal return tubular
d) highly regulated treatment
e) horizontal receiver tubes

Answer: C

A device used to prevent the carry-over of moisture with the steam of an HRT boiler is the

A device used to prevent the carry-over of moisture with the steam of an HRT boiler is the

a) internal pipe
b) dry pipe
c) nozzle
d) head pipe
e) crown tube

Answer: B

HRT boiler firetubes have a diameter range of

HRT boiler firetubes have a diameter range of

a) 25 to 51 mm
b) 51 to 102 mm
c) 76 to 102 mm
d) 102 to 137 mm
e) 125 to 176 mm

Answer: C

In the phosphate test, what reagent is used?

In the phosphate test, what reagent is used?

A. Molybdate
B. Stannous
C. Potassium-iodide-iodate
D. A and C
E. A and B





Answer: E

In the sodium sulphite test, ___ is added drop by drop until a permanent light blue color is attained.

In the sodium sulphite test, ___ is added drop by drop until a permanent light blue color is attained.

A. Starch
B. Potassium-iodide-iodate
C. Molybdate reagent
D. Hydroxides
E. Bicarbonates






Answer: B

Which test uses a device with two electrodes that are immersed in the sample and a voltage is supplied to the electrodes by a means of a battery.

Which test uses a device with two electrodes that are immersed in the sample and a voltage is supplied to the electrodes by a means of a battery.

A. Methyl orange test
B. pH testing
C. Sodium sulphite test
D. Phosphate test
E. Dissolved solid test





Answer: B

Which test measures the ability of the water to conduct an electric current?

Which test measures the ability of the water to conduct an electric current?

A. Methyl orange test
B. pH testing
C. Sodium sulphite test
D. Phosphate test
E. Dissolved solid test





Answer: E

In the methyl orange test, if a yellow color is produced then this means that the sample is still alkaline due to __ present.

In the methyl orange test, if a yellow color is produced then this means that the sample is still alkaline due to __ present.

A. Bicarbonates
B. Hydroxides
C. Sulphuric acid
D. Phosphates
E. Sodium carbonate





Answer: A

In the phenolphthalein test __ is added drop by drop to the water until the pink color disappears.

In the phenolphthalein test __ is added drop by drop to the water until the pink color disappears.

A. Bicarbonates
B. Hydroxides
C. Sulphuric acid
D. Phosphates
E. Sodium carbonate






Answer: C

The titration test has an accuracy of 10% if the ppm is lower than __ppm.

The titration test has an accuracy of 10% if the ppm is lower than __ppm.

A. 10
B. 5
C. 15
D. 17
E. 8






Answer: B

The titration test has an accuracy of 2% if the ppm is between __ppm to __ppm.

The titration test has an accuracy of 2% if the ppm is between __ppm to __ppm.

A. 2 to 1000
B. 3 to 1100
C. 4 to 1300
D. 5 to 1200
E. 6 to 1500






Answer: D

Sample line is connected to?

Sample line is connected to?

A. Boiler drum
B. Feedwater line
C. Continuous blowdown line
D. Chemical line
E. Blowdown tank

Answer: C

Sample water passes through a cooler where its temperature is reduced to about __C.

Sample water passes through a cooler where its temperature is reduced to about __C.

A. 32
B. 24
C. 15
D. 9
E. 28




Answer: B

Corrosion of return lines is caused by?

Corrosion of return lines is caused by?

A. Sodium hydroxide and sodium carbonate
B. Sodium phosphate and Sodium sulphite
C. Bicarbonates and phosphates
D. Oxygen and carbon dioxide
E. All of the above

Answer: D

Chemical that prevent caustic embrittlement is?

Chemical that prevent caustic embrittlement is?

A. Sodium nitrate
B. Lignins
C. Tannins
D. All of the above




Answer: D

Disadvantage of sodium hydroxide is?

Disadvantage of sodium hydroxide is?

A. Causes caustic embrittlement of the boiler metal
B. Causes forming
C. Poor for pH control
D. All of the above
E. A and C





Answer: A

Hydrazine chemical formula?

Hydrazine chemical formula?

A. NH2
B. N2H3
C. N2H4
D. N3H3
E. N4H4







Answer: C

Chemicals used for scale prevention are?

Chemicals used for scale prevention are?

A. Tannin
B. Sodium aluminate
C. Lignin
D. All of the above
E. A and C






Answer: B

Chemicals used for sludge conditioning are?

Chemicals used for sludge conditioning are?

A. Sodium carbonate
B. Sodium hydroxide
C. Alginates
D. All of the above
E. A and B






Answer: C

Chemicals are sold by:

Chemicals are sold by:

A. Generic names
B. Trade names
C. Numbers
D. All of the above
E. B and C

Answer: E

Caustic acid is?

Caustic acid is?

A. Sodium hydroxide
B. Sodium sulphite
C. Sodium chromate
D. Sodium carbonate
E. Sodium phosphate





Answer: A

Soda ash is?

Soda ash is?

A. Sodium hydroxide
B. Sodium sulphite
C. Sodium chromate
D. Sodium carbonate
E. Sodium phosphate





Answer: D

Low pressure hot water boilers require:

Low pressure hot water boilers require:

A. Proper pH control
B. Extensive internal water treatment
C. Corrosion prevention
D. All of the above
E. A and C

Answer: E

A continuous blow-off is

A continuous blow-off is

a) used to reduce the dissolved gases in the boiler
b) installed in the steam drum
c) used on every boiler
d) installed in the lower drum
e) used to reduce sludge






Answer: B

When performing a water test be sure that:

When performing a water test be sure that:

1. all equipment is clean and in good working order
2. results are recorded carefully before making the test
3. test solutions, indicators, and reagents are fresh, and at full strength
4. test reagents are filtered before use





a) 1, 2
b) 2, 3
c) 1, 3
d) 2, 4
e) 3, 4





Answer: C

Boiler water chemicals are injected

Boiler water chemicals are injected

a) in measured amounts once per year
b) after considering the water test readings
c) into the water softener
d) to prevent the water becoming too alkaline
e) each time after blowing down





Answer: B

The phenolphthalein or "P" alkalinity test does not indicate alkalinity due to

The phenolphthalein or "P" alkalinity test does not indicate alkalinity due to

a) hydroxides
b) bicarbonates
c) sulphates
d) carbonates
e) phosphates






Answer: B

One element which leads to caustic embrittlement in boiler tubes is

One element which leads to caustic embrittlement in boiler tubes is

a) concentration of sodium hydroxide
b) concentration of sodium chloride
c) overheating of boiler parts
d) concentration of sodium sulphite
e) excessive boiler pressure






Answer: A

To prevent scale formation, inject

To prevent scale formation, inject

a) zeolite
b) sodium chloride
c) phenolphthalein
d) amines
e) phosphates





Answer: E

The boiler blowoff should be used to

The boiler blowoff should be used to

a) reduce steam pressure
b) reduce feedwater pressure
c) control the total dissolved solids
d) prevent scale formation
e) expel the sodium sulphite







Answer: C

Foaming of water in the boiler

Foaming of water in the boiler

a) is due to a high concentration of dissolved gases
b) can be controlled by adding sodium phosphate
c) can be controlled by adding more neutralizing amines
d) can be controlled by adding sulphur to the feedwater
e) can be controlled by the bottom and continuous blow downs







Answer: E

Internal water treatment is

Internal water treatment is

a) used with low pressure boilers only
b) adding chemicals to the boiler water
c) adding a coagulant to the settling tank
d) measuring the pH of the feedwater
e) adding chemicals to the steam in the boiler

Answer: B

Sludge is usually removed from the boiler by

Sludge is usually removed from the boiler by

a) filtering the water before it leaves the boiler
b) raking it into a sludge trap
c) vacuuming it from the bottom
d) blowing down through the bottom blow down connection
e) blowing down through the continuous blow down

Answer: D

Excess sulphite is necessary to prevent

Excess sulphite is necessary to prevent

a) pitting
b) hardness
c) carry over
d) acidity
e) sludging




Answer: A

Two common chemicals used for deaeration are Na2SO3 and

Two common chemicals used for deaeration are Na2SO3 and

a) NaOH
b) H2SO4
c) N2H4
d) Na3PO4
e) Na2(HCO3)2

Answer: C

Relative to internal treatment, it is customary to:

Relative to internal treatment, it is customary to:

a. Use chemicals to precipitate dissolved solids
b. Prevent dissolved solids from leaving the boiler
c. Condition dissolved solids so they will not precipitate
d. Treat dissolved solids so they will more easily stick to boiler surfaces
e. Mechanically filter out dissolved solids




Answer: A

Phenolphthalein:

Phenolphthalein:

a. Turns pink in the presence of an alkali
b. Is put in natural gas to give it an odor
c. Is fed to cast iron boilers
d. Prevents caustic embrittlement
e. Indicates the presence of an acid





Answer: A

To prevent scale formation, ________ is injected into the boiler water.

To prevent scale formation, ________ is injected into the boiler water.

a. Zeolite
b. Sodium chloride
c. Phenolphthalein
d. Amine
e. Phosphate





Answer: E

When testing the total dissolved solids of a water sample, the highly conductive impurity that must first be neutralized is:

When testing the total dissolved solids of a water sample, the highly conductive impurity that must first be neutralized is:

a. Sodium phosphate
b. Hydroxide alkalinity
c. pH
d. Suspended solids
e. Sodium chloride



Answer: B

Titration, when testing boiler water, is done with:

Titration, when testing boiler water, is done with:

a. A conductivity tester
b. Phenolphthalein
c. An indicator
d. Trisodium phosphate
e. A reagent






Answer: E

The water in a boiler should be kept:

The water in a boiler should be kept:

a. Moderately alkaline
b. Neutral
c. Mildly acidic
d. Aerated when the boiler is not in service
e. Turbid





Answer: A

Sodium phosphates:

Sodium phosphates:

a. Put a light protective scale on the heating surfaces
b. Prevent scale formation and keep the boiler water alkaline and non-corrosive
c. Absorb dissolved oxygen and prevents CO3 pitting
d. Prevent the formation of any kind of sludge
e. Prevent erosion of the boiler metal





Answer: B

A conductivity meter is used to measure the:

A conductivity meter is used to measure the:

a. Current
b. Alkalinity
c. Electrolyte
d. Voltage
e. Total Dissolved Solids






Answer: E

When testing boiler water, a conductivity meter is used to measure:

When testing boiler water, a conductivity meter is used to measure:

a. Total alkalinity
b. Hydroxide alkalinity
c. Hardness in parts per million or grains per gallon
d. Total suspended matter
e. Total dissolved solids






Answer: C

Carbon dioxide may cause corrosion in condensate return lines. This corrosive carbon dioxide may originate:

Carbon dioxide may cause corrosion in condensate return lines. This corrosive carbon dioxide may originate:

a. by absorption in the deaerator
b. as Sodium sulphite in the boiler water
c. by decomposition of bicarbonates in the boiler water
d. In condensate neutralizing amines
e. from air leaking into the return lines





Answer: C

Chemicals are fed to a watertube boiler:

Chemicals are fed to a watertube boiler:

a. With a small centrifugal pump
b. Into the top drum only
c. With a small positive displacement pump
d. Into the bottom drum only
e. Prior to operating the blowoff valves





Answer: C

A residual of 20 to 40 ppm of sodium sulphite is maintained in the boiler water to:

A residual of 20 to 40 ppm of sodium sulphite is maintained in the boiler water to:

a. Condition the sludge
b. Prevent pitting in the steam drum
c. Prevent scale deposition
d. Precipitate scale forming compounds as sludge
e. Reduce boiler water alkalinity







Answer: B

Total alkalinity is measured:

Total alkalinity is measured:

a. Using methyl orange indicator and sulfuric acid
b. To ensure it doesn't exceed 2500 ppm
c. To control the dissolved oxygen
d. To control sludge formation
e. By using phenolphthalein and sulfuric acid




Answer: A

Phenolphthalein is a/an:

Phenolphthalein is a/an:

a. Indicator
b. Reagent
c. Buffer
d. Acid softener
e. Neutralizing agent





Answer: A

In order to maintain good boiler water:

In order to maintain good boiler water:

a. Use a good quality filter
b. Feed calcium sulfate
c. Feed magnesium sulfate
d. Use a feedwater treatment prescribed by a water consultant
e. Use an automated water softening system






Answer: D

Sludge conditioning in a boiler:

Sludge conditioning in a boiler:

a. Is controlled by the continuous blow down
b. Prevents pollution from the blowdown water
c. Prevents precipitates from adhering to boiler surfaces
d. Is done to mix the sludge with the boiler water
e. Neutralizes sludge forming substances





Answer: C

Condensate return line corrosion can be controlled by:

Condensate return line corrosion can be controlled by:

a. Feeding sodium bicarbonate to the boiler
b. Adding sodium phosphate to the return lines
c. Adding sodium sulphite
d. Feeding amines
e. Adding polymers





Answer: D

Sodium sulphite:

Sodium sulphite:

a. Prevents the corrosion caused by oxygen in boiler water
b. Precipitates calcium and magnesium compounds
c. Prevents scale adhering to the tubes
d. Controls foaming
e. Controls return line corrosion




Answer: A

The methyl orange or "M" alkalinity test indicates the alkalinity that is due to:

The methyl orange or "M" alkalinity test indicates the alkalinity that is due to:

a. Carbonates only
b. Bicarbonates only
c. Hydroxides only
d. All forms of alkalinity
e. The presence of organics





Answer: D

When testing boiler water, a conductivity meter is used to measure:

When testing boiler water, a conductivity meter is used to measure:

a. Total alkalinity
b. Hydroxide alkalinity
c. Hardness in parts per million or grains per gallon
d. Total suspended matter
e. Total dissolved solids

Answer: E

The pH of the water inside a boiler:

The pH of the water inside a boiler:

a. Is controlled with sodium hydroxide
b. Could be controlled with amines
c. Cannot be controlled
d. Is controlled by adding pure water to the boiler
e. Is lowered by adding acid if the pH is too low.





Answer: A

Alkalinity in boiler water may be due to calcium, sodium, or magnesium:

Alkalinity in boiler water may be due to calcium, sodium, or magnesium:

a. Hydroxides only
b. Carbonates and bicarbonates only
c. Bicarbonates only
d. Hydroxides and bicarbonates only
e. Hydroxides, carbonates, and bicarbonates





Answer: E

Demineralizer anion exchanger takes acid containing water and exchanges it with?

Demineralizer anion exchanger takes acid containing water and exchanges it with?

A. Sodium ions
B. Hydroxide ions
C. Magnesium ions
D. Hydrogen ions
E. Sulphur ions

Answer: B

Demineralizer salts in the cation exchanger are converted into __ and __.

Demineralizer salts in the cation exchanger are converted into __ and __.

A. Sulphuric, hyrdochloric, carbon dioxide, water
B. Magnesium, calcium, carbon dioxide, water
C. Sulphuric, hydrochloric, water
D. Magnesium, calcium, water
E. Sulphuric, hydochloric, carbon dioxide

Answer: A

Demineralizer cation exchanger removes calcium, magnesium and __ cations.

Demineralizer cation exchanger removes calcium, magnesium and __ cations.

A. Sodium
B. Hydrogen
C. Sulphur
D. Hydrochloric
E. Iron

Answer: A

Demineralizers cation exchanger takes water containing salts and exchanges it with?

Demineralizers cation exchanger takes water containing salts and exchanges it with?

A. Sodium ions
B. Hydroxide ions
C. Magnesium ions
D. Hydrogen ions
E. Sulphur ions

Answer: D

Sodium chloride is also known as?

Sodium chloride is also known as?

A. Polyethylene
B. Dacron
C. Brine
D. Porous
E. Anthracite

Answer: C

When the zeolite material has given up all its Na cations, regeneration is done by filling it with a ___ solution.

When the zeolite material has given up all its Na cations, regeneration is done by filling it with a ___ solution.

A. Sodium carbonate
B. Sodium anions
C. Sodium cations
D. Sodium bicarbonate
E. Sodium chloride

Answer: E

The zeolite is charged with a large amount of ?

The zeolite is charged with a large amount of ?

A. Sodium carbonate
B. Sodium anions
C. Sodium cations
D. Sodium bicarbonate
E. Sodium sulphate

Answer: C

Lime-Soda Softeners use ___ to add to the water causing the scale-forming dissolved solids:

Lime-Soda Softeners use ___ to add to the water causing the scale-forming dissolved solids:

A. Calcium hydroxide
B. Sodium chloride
C. Sodium carbonate
D. All of the above
E. A and C

Answer: E

In a cartridge filter, when the pressure drop between the inlet and outlet reaches a specified maximum valve, the cartridge must be?

In a cartridge filter, when the pressure drop between the inlet and outlet reaches a specified maximum valve, the cartridge must be?

A. Backwashed
B. Reparied
C. Replaced
D. Pressure going in must be closed to reduce the pressure drop
E. Pressure going out must be closed to reduce the pressure drop

Answer: C

In a tubular filter-aid filter, when the filter starts to clog and requires backwashing, inlet and outlet valves are __ and the drain valve is __.

In a tubular filter-aid filter, when the filter starts to clog and requires backwashing, inlet and outlet valves are __ and the drain valve is __.

A. Open, open
B. Open, closed
C. Closed, closed
D. Closed, open

Answer: D

In a tubular filter-aid filter, cylindrical tubes are covered by socks made of __ filter cloth?

In a tubular filter-aid filter, cylindrical tubes are covered by socks made of __ filter cloth?

A. Dacron
B. Porous
C. Anthracite
D. Polyethylene
E. A and D

Answer: E

In a pressure filter, any suspended matter in the water will be trapped by ___ material?

In a pressure filter, any suspended matter in the water will be trapped by ___ material?

A. Sand
B. Anthracite
C. Calcite
D. Porous
E. Gravel

Answer: D

Dissolved solids cannot be removed by?

Dissolved solids cannot be removed by?

A. Lime-soda softener
B. Filters
C. Sodium zeolite softener
D. Settling tanks
E. B and D

Answer: E

Bicarbonates and sulphates are undesirable because they will cause?

Bicarbonates and sulphates are undesirable because they will cause?

A. Overheating of boiler tubes
B. Foaming
C. Sludge on boiler surfaces
D. Corrosion of boiler metal
E. Carryover of impurities

Answer: A

If sulphates of calcium and magnesium are not removed, they will cause?

If sulphates of calcium and magnesium are not removed, they will cause?

A. Foaming
B. Soft scale
C. Hard scale
D. All of the above
E. A and C

Answer: C

If bicarbonates are not removed before the water enters the boiler, they will cause?

If bicarbonates are not removed before the water enters the boiler, they will cause?

A. Foaming
B. Soft scale
C. Hard scale
D. All of the above
E. A and C

Answer: B

Coagulants added to water

Coagulants added to water

a) make the water soft
b) will remove fine particles more readily
c) remove the dissolved solids
d) causes the fine particles to float to the surface
e) remove chemicals not used up

Answer: B

Filters are used

Filters are used

a) for external water treatment
b) to remove dissolved solids
c) to remove calcium bicarbonates
d) for internal treatment
e) to remove hardness

Answer: A

The capacity of a sodium zeolite softener will drop due to zeolite attrition at about

The capacity of a sodium zeolite softener will drop due to zeolite attrition at about

a) 5% per year
b) 3% per year
c) 15% per year
d) 1% per year
e) 7% per year

Answer: B

Zeolite of a sodium zeolite softener may be discharged to the sewer during the

Zeolite of a sodium zeolite softener may be discharged to the sewer during the

a) injection stage of a regeneration
b) service stage
c) slow rinse stage of a regeneration
d) fast rinse stage of a regeneration
e) backwash stage of a regeneration

Answer: E

The regenerant used to regenerate a cation demineralizer is

The regenerant used to regenerate a cation demineralizer is

a) hydrochloric acid
b) sodium chloride
c) caustic soda
d) sodium hydroxide
e) sulphuric acid

Answer: E

The chemical equation which represents the modification of bicarbonates in hard water by the use of a zeolite softener is

The chemical equation which represents the modification of bicarbonates in hard water by the use of a zeolite softener is

a) Ca(HCO3)2 + Na2Z = CaZ + 2NaHCO3
b) CaZ + 2NaCl = Na2Z + CaCl
c) MgSO4 + Na2Z = MgZ + Na2SO4
d) Ca(HCO3)2 + Na2Z = CaZ + NaHCO3
e) MgZ + 2NaCl = Na2 + MgCl2

Answer: A

The result of adding Al2 (SO4)3 to the raw water is

The result of adding Al2 (SO4)3 to the raw water is 

a) a higher pH
b) floc
c) corrosion
d) pitting
e) sublimation

Answer: B

Feedwater for a high pressure boiler should be

Feedwater for a high pressure boiler should be

a) treated with phosphate
b) treated with phenolphthalein
c) treated city water
d) treated with salt
e) softened water

Answer: E

Permanent hardness is caused by?

Permanent hardness is caused by?

a. Calcium sulphate
b. Sodium nitrate
c. Magnesium bicarbonate
d. Calcium carbonate
e. Iron oxide

Answer: A

Which of the following is an example of dissolved solids?

Which of the following is an example of dissolved solids?

a) Magnesium sulphate
b) Sodium nitrate
c) Calcium bicarbonate
d) A and C
e) All of the above

Answer: D

Which of the following is an example of suspended matter?

Which of the following is an example of suspended matter?

a) mud
b) sand
c) organic material
d) A and B
e) All of the above

Answer: E

Corrosion products in feed water can cause

Corrosion products in feed water can cause

a) slag deposits in superheaters
b) decreased steam pressure
c) increased steam pressure
d) increase in boiler efficiency
e) tube failure

Answer: E

Boiler water with an alkalinity that is too high will likely

Boiler water with an alkalinity that is too high will likely

a) have a lot of scale
b) show signs of pitting
c) have a low pH
d) foam
e) have grooving on its surfaces

Answer: E

Boiler surfaces may have what appears to be blisters which are composed of

Boiler surfaces may have what appears to be blisters which are composed of

a) iron oxide
b) sodium sulphite
c) caustic soda
d) ferric sulphate
e) chelates

Answer: A

Boiler water is treated in order to prevent

Boiler water is treated in order to prevent

a) sludge, mud, pitting, corrosion
b) foaming, corrosion, carryover, sludge
c) sludge, corrosion, scale, carryover
d) scale, sludge, mud, pitting
e) foaming, carryover, pitting, corrosion

Answer: C

The balanced chemical equation for the removal of sulphate hardness, using a zeolite softener, is:

The balanced chemical equation for the removal of sulphate hardness, using a zeolite softener, is: 

a. MgZ + 2NaCl = Na2 + MgCl2
b. Ca(HCO3)2 + Na2Z = CaZ + 2NaHCO3
c. CaZ + 2NaCl = Na2Z + CaCl2
d. MgSO4 + Na2Z = MgZ + Na2SO4
e. MgSO4 + Na2Z = 2MgZ + 2NaSO4

Answer: D

Aluminum compounds, when added to water to form floc in a clarifying system, are known as:

Aluminum compounds, when added to water to form floc in a clarifying system, are known as:

a. Curdlers
b. Congealants
c. Coagulants
d. Thickeners
e. Flocs

Answer: C

During the "Rinse" stage when regenerating a sodium zeolite softener, the solution going to the sewer contains:

During the "Rinse" stage when regenerating a sodium zeolite softener, the solution going to the sewer contains:

a. Calcium sulphate
b. Sulphates and bicarbonates
c. Calcium and magnesium ions
d. Sodium bicarbonates and sulphates
e. Magnesium bicarbonate

Answer: C

In a zeolite water softener, the scale-forming salts are:

In a zeolite water softener, the scale-forming salts are:

a. Completely removed
b. Changed into non-scale forming sodium salts
c. Filtered out
d. Absorbed by the zeolite
e. Blown out

Answer: B

Hot lime-soda softeners:

Hot lime-soda softeners:

a. Can treat larger quantities of water than cold lime processes
b. Will remove all dissolved solids from the water
c. Are mostly used in small heating plants
d. Are only used to treat well water
e. Use calcium oxide and sodium bicarbonate to remove hardness

Answer: A