If the water level falls too low during operation of a steam heating boiler the operator should

If the water level falls too low during operation of a steam heating boiler the operator should a) tell his or her supervisor b) add more water immediately c)...

The piping and heating units of a steam heating system must be so arranged that

The piping and heating units of a steam heating system must be so arranged that a) the condensate can flow freely to the heating units b) the air...

The two pipe gravity return steam heating system, now obsolete, had the disadvantage that during startup, some steam could pass through a radiator without condensing and could enter other radiators via the return main, thus trapping:

The two pipe gravity return steam heating system, now obsolete, had the disadvantage that during startup, some steam could pass through a radiator without...

The ______________ system overcomes the difficulty of returning condensate back to the boiler due to inefficient static head.

The ______________ system overcomes the difficulty of returning condensate back to the boiler due to inefficient static head. a. One pipe, gravity...

Slow or insufficient heat in one or more rooms in a steam, heated building can be caused by a faulty:

Slow or insufficient heat in one or more rooms in a steam, heated building can be caused by a faulty: a. Steam trap b. Condensate tank float switch c....

In the two, pipe variable vacuum steam heating system, the steam temperature can be varied from:

In the two, pipe variable vacuum steam heating system, the steam temperature can be varied from: a. 200°C to as low as 100°C b. 150°C to as low as...

Finned convectors should be kept free of:

Finned convectors should be kept free of: a. Air b. Steam c. Corrosion d. Dust e. Scale Answer:...

When starting up a steam heating boiler, it should be filled to:

When starting up a steam heating boiler, it should be filled to: a. The maximum level b. 3/4 of the gauge glass c. 1/2 of the gauge glass d. 1/4...

In a gravity return system, the boiler should be placed:

In a gravity return system, the boiler should be placed: a. Well above the highest radiator b. Well below the lowest radiator c. On an elevated platform d....

After a steam heating system has been operating for some time, you notice that some parts of the heating system are still cold. Which one of the following could be the cause of this?

After a steam heating system has been operating for some time, you notice that some parts of the heating system are still cold. Which one of the following...

When the return main of a gravity return steam heating system is located below the level of the water line in the boiler, it is called:

When the return main of a gravity return steam heating system is located below the level of the water line in the boiler, it is called: a. Flooded...

The piping and heating units of a steam heating system must be so arranged that the:

The piping and heating units of a steam heating system must be so arranged that the: a. Condensate can be circulated back to the heating units b....

When a single main is used to carry both the steam supply from the boiler to the radiators and the steam condensate from the radiators back to the boiler, the system is called a one pipe:

When a single main is used to carry both the steam supply from the boiler to the radiators and the steam condensate from the radiators back to the boiler,...

In all systems, the horizontal steam supply pipes between boiler and heating units are called the:

In all systems, the horizontal steam supply pipes between boiler and heating units are called the: a. Mains b. Risers c. Banks d. Branches e. Downcomers Answer:...

All supply and drain lines of a steam heating system must be pitched to:

All supply and drain lines of a steam heating system must be pitched to: a. Allow for drainage of condensate b. Allow collection of air at the highest...

In the case of radiators and convectors, the main sources of trouble are the:

In the case of radiators and convectors, the main sources of trouble are the: a. Air vents b. Fins c. Push nipples d. Connecting rods e. Valves and...

Slow or insufficient heat throughout a building heated by steam can be caused by:

Slow or insufficient heat throughout a building heated by steam can be caused by: a. Too high a firing rate b. Too low a firing rate c. Air leaks d....

Which of the following would you NOT find in a steam heating system?

Which of the following would you NOT find in a steam heating system? a. Cushion tanks b. Convectors c. Return traps d. Condensate tanks e. Air vents Answer:...

The Hartford Loop prevents the water in the boiler from:

The Hartford Loop prevents the water in the boiler from: a. Exceeding the maximum temperature b. Exceeding the highest safe level c. Dropping below...

A pressure balancing arrangement that prevents the boiler pressure from forcing boiler water into the return lines is called a:

A pressure balancing arrangement that prevents the boiler pressure from forcing boiler water into the return lines is called a: a. Relief valve b....

The vacuum pump performs the following function:

The vacuum pump performs the following function: a) supplies water to the condensate receiver b) supplies steam to the boiler c) returns the condensate...

Air can be removed from steam heating systems by

Air can be removed from steam heating systems by a) air vents b) a steam trap c) an air separator d) an air header e) a dip tube Answer:...

Convectors use ________ to increase heat transfer.

Convectors use ________ to increase heat transfer. a) metal fins b) radiators c) blowers d) copper tubes e) brass tubes Answer: ...

The difference between a convector and a radiator is:

The difference between a convector and a radiator is: a. The convector uses fans b. The radiator's fins are much larger c. The radiator is controlled...

One of the main considerations in the construction of radiators suitable for steam heating systems is:

One of the main considerations in the construction of radiators suitable for steam heating systems is: a. Large heating surface area b. Ruggedness c....

Modern radiators are usually made of:

Modern radiators are usually made of: a. Steel b. Cast iron c. Stainless steel d. Copper e. Brass Answer:...

A radiator valve is used to control the amount of:

A radiator valve is used to control the amount of: a. Air leaving the radiator b. Condensate leaving the radiator c. Steam leaving the radiator d....

Radiators can be classified as:

Radiators can be classified as: a. Floor, window or ceiling b. Window, duct or floor c. Wall-hung, floor, and window d. Legless, ductless and floor e....

In newer steam heating systems, the condensate discharged by the steam traps, convectors, or other heating equipment, drains by gravity through the return piping to:

In newer steam heating systems, the condensate discharged by the steam traps, convectors, or other heating equipment, drains by gravity through the...

Another name for a unit ventilator is:

Another name for a unit ventilator is: a. Radiator b. Exhauster c. Convector d. Register e. Univent Answer: ...

The radiator trap is a device that allows:

The radiator trap is a device that allows: a. Debris to collect b. Steam to collect c. Water and steam to collect d. Steam to be discharged from...

The level in the condensate receiver may be automatically controlled by a:

The level in the condensate receiver may be automatically controlled by a: a. Float switch b. Pressure reducing valve c. Gate valve d. Drain valve e....

Older radiators were usually made of:

Older radiators were usually made of: a. Steel b. Cast iron c. Stainless steel d. Copper e. Brass Answer:...

Unit heaters differ from convectors in that they use _____ to increase heat transfer.

Unit heaters differ from convectors in that they use _____ to increase heat transfer. a. Metal fins b. Natural circulation c. Blowers d. Copper tubes e....

_____ are often used to aid the return of condensate through the return piping of large complexes.

_____ are often used to aid the return of condensate through the return piping of large complexes. a. Boiler feed pumps b. Vacuum injectors c. Pressure...

When air is forced through a heating unit that contains both the fan and coil, the unit is called:

When air is forced through a heating unit that contains both the fan and coil, the unit is called: a. A unit heater b. An injector c. An induction...

Older radiators were usually made of:

Older radiators were usually made of: a. Steel b. Cast iron c. Stainless steel d. Copper e. Brass Answer:...

Unit ventilators :

Unit ventilators : a. do not filter the air b. do not provide fresh air c. do not use fans to circulate air d. mix outside and inside air. e. do not...

In fin coil type heaters, individual room temperature is controlled by

In fin coil type heaters, individual room temperature is controlled by a. Switches b. Automatic valves c. Dampers d. Air relays e. Supply ducts Answer:...

The packless radiator valve has a bronze diaphragm that completely seals off the valve body, to prevent:

The packless radiator valve has a bronze diaphragm that completely seals off the valve body, to prevent: a. Air from entering the radiator b. Condensate...

An air vent is partially filled with volatile liquid so that:

An air vent is partially filled with volatile liquid so that: a. When hot steam surrounds cylinder, it causes the needle valve to open. b. When relatively...

Unit ventilators are:

Unit ventilators are: a. Ceiling suspended unit heaters b. Baseboard type heaters c. Cabinet type heaters d. Ceiling mounted unit heaters e. Floor...

Hand operated pet cocks for expelling air from heating systems have been superseded by:

Hand operated pet cocks for expelling air from heating systems have been superseded by: a. Steam traps b. Diverters c. Automatic air vents d. Check...

Large areas, such as warehouses, are usually heated by:

Large areas, such as warehouses, are usually heated by: a. Unit heaters b. Radiators c. Convectors d. Open heaters e. Space heaters Answer:...

The minimum temperature at which a hot water boiler should be operated to prevent flue gas condensation is ___C.

The minimum temperature at which a hot water boiler should be operated to prevent flue gas condensation is ___C. a. 65 b. 77 c. 95 d. 88 Answer:...

An excessive rise in stack temperature can be caused by:

An excessive rise in stack temperature can be caused by: a. Heavy scale build up b. Too much cold air in the furnace c. High solid content in the...

Smoking conditions during the operation of a boiler can be caused by

Smoking conditions during the operation of a boiler can be caused by a) improper air/fuel ratio b) steam demands too great c) low water conditions d)...

It is recommended that the differential between the safety relief valve set pressure and the operating pressure of a hot water boiler be kept to a minimum of 69 kPa (10 psi) or __________ % of the relief valve setting.

It is recommended that the differential between the safety relief valve set pressure and the operating pressure of a hot water boiler be kept to a minimum...

Thermal shock to boilers can be reduced by

Thermal shock to boilers can be reduced by a) warming up boilers slowly b) keeping the boiler free of scale build-up c) covering the tube sheets...

The maximum pressure of a low pressure steam heating boiler is

The maximum pressure of a low pressure steam heating boiler is a) 70 kPa b) 103 kPa c) 113 kPa d) 207 kPa e) 1104 kPa Answer:...

There are two conditions that may occur during the warm up period which may seem to be abnormal to the operator but will disappear after the boiler heats up. These conditions are

There are two conditions that may occur during the warm up period which may seem to be abnormal to the operator but will disappear after the boiler...

The discharge pressure of steam heating pressure relief valves should never exceed

The discharge pressure of steam heating pressure relief valves should never exceed a) 14.7 kPa b) 121 kPa c) 93 kPa d) 103 kPa e) 153 kPa Answer:...

The pressure relief valve on a hot water heating boiler should be set

The pressure relief valve on a hot water heating boiler should be set a) 25% lower than operating pressure b) 10% lower than operating pressure c)...

In hot water boiler operation the maximum operating temperature should never exceed

In hot water boiler operation the maximum operating temperature should never exceed a) 77 degrees C b) 87 degrees C c) 100 degrees C d) 121 degrees...

If the low-water fuel cutoff and/or the high limit control are equipped with a trip-out device on a boiler, it is recommended as part of the startup preparation to

If the low-water fuel cutoff and/or the high limit control are equipped with a trip-out device on a boiler, it is recommended as part of the startup...

When preparing a boiler for startup and the boiler is equipped with a modulating combustion control, it is best to

When preparing a boiler for startup and the boiler is equipped with a modulating combustion control, it is best to a) set the manual-auto switch...

How often would you test the low level fuel cut-off on a low pressure steam heating boiler by blowing out the float chamber?

How often would you test the low level fuel cut-off on a low pressure steam heating boiler by blowing out the float chamber? a. Daily b. Monthly c....

Rust in the gauge glass is an indication that:

Rust in the gauge glass is an indication that: a. The boiler should to be blown down b. Raw water is leaking into the boiler c. The copper and brass...

The most important rule in safe operation of steam boilers is to:

The most important rule in safe operation of steam boilers is to: a. Watch the steam pressure b. Not overheat the boiler c. Ensure an adequate air...

A gradual increase in stack temperature is an indication of:

A gradual increase in stack temperature is an indication of: a. Correct burner operation b. Poor operator skill c. A defective stack thermometer d....

Slight smoking during the start-up of a cold oil-fired boiler is caused by:

Slight smoking during the start-up of a cold oil-fired boiler is caused by: a. Dislodging soot from the gas passes b. Having the initial fire too...

The most efficient way to keep oxygen out of the boiler water system is to:

The most efficient way to keep oxygen out of the boiler water system is to: a. Add sufficient oxygen scavenger b. Keep make-up water to a minimum c....

Thermal shock to boilers can be reduced by:

Thermal shock to boilers can be reduced by: a. Warming up boilers quickly b. Allowing the boiler to develop a thin, insulating coating of scale c....

If your low pressure steam boiler was in service and you found that there was no water level showing in the gauge glass, your first action would be to:

If your low pressure steam boiler was in service and you found that there was no water level showing in the gauge glass, your first action would be...

During the warm up period of a heating boiler, the main burner goes out. The operator should:

During the warm up period of a heating boiler, the main burner goes out. The operator should: a. Shut down the boiler immediately purge the boiler...

It is vitally important to slowly heat up a cold boiler to prevent:

It is vitally important to slowly heat up a cold boiler to prevent: a. Smoky flue gas b. Uneven expansion c. Even expansion. d. Low efficiency e....

It is very important that boilers should be:

It is very important that boilers should be: a. Warmed up quickly to prevent condensation b. Warmed up quickly to prevent scale build-up c. Warmed...

Before starting up a new boiler or one that has been out of service the following must be ensured:

Before starting up a new boiler or one that has been out of service the following must be ensured: a. The manufacturer's recommendations are read b....

While warming up an additional hot water heating boiler in preparation to put into service with other boilers, which of the following is true?

While warming up an additional hot water heating boiler in preparation to put into service with other boilers, which of the following is true? a....

The most important rule in safe operation of a steam heating boiler is:

The most important rule in safe operation of a steam heating boiler is: a. Operate the burner properly b. Keep the water level in the boiler at the...

During warm-up of a cold hot water boiler excessive pressure build-up is prevented by

During warm-up of a cold hot water boiler excessive pressure build-up is prevented by a) a very slow warm-up b) an expansion tank c) a pressure relief...

A hot water boiler is protected from over pressure by means of

A hot water boiler is protected from over pressure by means of a) a safety pop valve b) a high limit pressure control c) an expansion valve d) an...

The expansion and contraction rod type of temperature relief device will open the valve at __________ degrees Celsius and close it at __________ degrees Celsius.

The expansion and contraction rod type of temperature relief device will open the valve at __________ degrees Celsius and close it at __________ degrees...

With the fusible plug type of temperature relief device, the fusible plug will melt at __________ degrees Celsius and allow hot water to escape.

With the fusible plug type of temperature relief device, the fusible plug will melt at __________ degrees Celsius and allow hot water to escape. a)...

Hot water heating boilers must be equipped with a

Hot water heating boilers must be equipped with a a) thermometer b) fusible plug c) return trap d) blow down tank e) steam pressure gage Answer:...

When the pressure pointer of a closed system reads lower than the altitude pointer the

When the pressure pointer of a closed system reads lower than the altitude pointer the a) system is full of water b) expansion tank level will be...

The dial of a pressure gauge on a hot water boiler indicating SI units can be graduated in

The dial of a pressure gauge on a hot water boiler indicating SI units can be graduated in a) metres of mercury b) mm of water c) mPa d) psi e) kPa Answer:...

The lever handle of the shut-off cock between a pressure or altitude gauge and a hot water boiler should be __________ to the pipe in which it is located when the cock is open.

The lever handle of the shut-off cock between a pressure or altitude gauge and a hot water boiler should be __________ to the pipe in which it is located...

Siphon is not required between a pressure or an altitude gauge and a hot water boiler since these boilers are

Siphon is not required between a pressure or an altitude gauge and a hot water boiler since these boilers are a) filled with steam b) partially filled...

When a closed expansion tank is used and the system is cold

When a closed expansion tank is used and the system is cold a) the auto fill valve will maintain a system minimum pressure b) the tank level will...

An altitude gauge on a hot water heating boiler is used to indicate:

An altitude gauge on a hot water heating boiler is used to indicate: a. Expansion tank temperature b. Boiler temperature c. Furnace draft d. The highest...

The entrained air in a hot water heating system is directed to the:

The entrained air in a hot water heating system is directed to the: a. Relief valve b. Boiler c. Radiator vents d. Expansion tank e. Atmosphere Answer:...

When a closed type expansion tank on a hot water boiler is completely filled with water and the water in the system is raised in temperature so that it expands, the result will be that the:

When a closed type expansion tank on a hot water boiler is completely filled with water and the water in the system is raised in temperature so that...

A closed expansion tank is often equipped with:

A closed expansion tank is often equipped with: a. A gauge glass b. A pressure relief valve c. An automatic fill valve d. A circulating pump e. A...

A closed type expansion tank in a hot water heating system must:

A closed type expansion tank in a hot water heating system must: a. Be full of water at all times b. Have a vent open to atmosphere at all times c....

A pressure or altitude gauge for a hot water heating boiler:

A pressure or altitude gauge for a hot water heating boiler: a. Must be calibrated in kPa b. Shall have a dial scale at least three times the maximum...

In a closed expansion tank system an air separator:

In a closed expansion tank system an air separator: a. Removes air from the system b. Is installed at the boiler inlet c. Is installed at the boiler...

An automatic fill valve for a hot water boiler:

An automatic fill valve for a hot water boiler: a. Will maintain maximum system pressure at all times b. Operates to maintain a constant boiler water...

When too much air has been absorbed by water in the expansion tank of a closed system, the tank must be:

When too much air has been absorbed by water in the expansion tank of a closed system, the tank must be: a. Attached to an air separator b. Filled c....

The temperature indicator of a hot water boiler should indicate water temperature:

The temperature indicator of a hot water boiler should indicate water temperature: a. At the boiler inlet b. In the expansion tank c. Midway through...

The pressure relief valve on a hot water boiler:

The pressure relief valve on a hot water boiler: a. Should be installed on the boiler or close to it b. Can be installed anywhere in the system c....

If a hot-water heating boiler has an automatic fill valve, and is requiring a lot of makeup water, this may indicate:

If a hot-water heating boiler has an automatic fill valve, and is requiring a lot of makeup water, this may indicate: a. The expansion tank is empty. b....

The scale on the dial of the pressure or altitude gauge on a hot water heating boiler shall be graduated approximately to not less than _____ times the maximum allowable working pressure.

The scale on the dial of the pressure or altitude gauge on a hot water heating boiler shall be graduated approximately to not less than _____ times...

Boiler stop valves shall be:

Boiler stop valves shall be: a. Always of the outside screw and yoke design b. Globe valves c. Identified with durable tags d. Installed on horizontal...

The scale on the dial of the pressure or altitude gauge on a hot water heating boiler shall be graduated to not more than _____ times the pressure at which the safety relief valve is set.

The scale on the dial of the pressure or altitude gauge on a hot water heating boiler shall be graduated to not more than _____ times the pressure at...

How many pressure relief valves shall a hot water heating boiler have?

How many pressure relief valves shall a hot water heating boiler have? a. None b. At least one c. At least two d. At least three e. At least four Answer:...

An expansion tank is used to:

An expansion tank is used to: a. Dampen pulsations in the water pressure b. Increase water temperature c. Allow for the expansion of the water d....

Hot water heating boilers have stop valves in their supply and return piping:

Hot water heating boilers have stop valves in their supply and return piping: a. To allow for better warm ups b. To prevent water from entering another...

An agency or code with which fittings must comply is:

An agency or code with which fittings must comply is: a. Health and Safety Code b. Fittings and Boiler Parts Act c. Boiler Repair Code d. Plumbing...

A compound gauge shows both:

A compound gauge shows both: a. Pressure and vacuum b. Kilopascals and Pounds per square inch c. Pressure and temperature d. Pressure and head Answer:...

The cross-section of a Bourdon tube is generally

The cross-section of a Bourdon tube is generally a) circular b) round c) cylindrical d) spherical e) oval Answer:...

As the boiler pressure increases, the bourdon tube of the pressure gauge will

As the boiler pressure increases, the bourdon tube of the pressure gauge will a) tend to straighten b) compress more c) become less circular in cross-section d)...

The working medium in the dead weight tester is

The working medium in the dead weight tester is a) air b) water c) heavy oil d) medium weight oil e) alcohol Answer:...

When installing a siphon it

When installing a siphon it a) must be perpendicular to the piping b) must be dry c) should be downstream of an inspectors' test connection d) should...

A function of a Bourdon tube gage hairspring is

A function of a Bourdon tube gage hairspring is a) return the tube to its zero position b) keep the pointer on zero c) eliminate backlash d) return...

The purpose of the tee fitting on the piping leading to a boiler steam pressure gauge is to:

The purpose of the tee fitting on the piping leading to a boiler steam pressure gauge is to: a. Bypass the siphon tube b. Test a sample of steam...

One purpose of the small valve on top of the shell or the water column on most boilers is to:

One purpose of the small valve on top of the shell or the water column on most boilers is to: a. Signal when the boiler is full of water r. b....

An inspector's test connection for a boiler pressure gauge:

An inspector's test connection for a boiler pressure gauge: a. Should be located upstream of a siphon b. Should be of 12.7 mm NPT size c. Is required...

When using a dead weight tester, the effect of friction:

When using a dead weight tester, the effect of friction: a. Is reduced by rotating the platform b. Will cause a higher than desired reading c. Is...

The minimum size of the blowoff piping of a steam heating boiler is:

The minimum size of the blowoff piping of a steam heating boiler is: a. 75 mm b. 51 mm c. 20 mm d. 19 mm e. 15 mm Answer:...

All boiler fittings not properly or clearly identified should be:

All boiler fittings not properly or clearly identified should be: a. Rejected b. Used for low pressure services only c. First approved for use by...

A globe valve should be used in the feedwater line:

A globe valve should be used in the feedwater line: a. At all times b. Whenever it may be used for throttling purposes c. Only if it is of the outside...

How many blow-off valves does a steam heating boiler require?

How many blow-off valves does a steam heating boiler require? a. None b. One c. Two d. Three e. Four Answer:...

An indication of a pressure gauge not performing properly is:

An indication of a pressure gauge not performing properly is: a. The needle fluctuating b. The needle not returning to zero when gauge is depressurised c....

An outside screw and yoke valve:

An outside screw and yoke valve: a. Must be a gate valve b. Readily shows its operating position c. Is difficult to lubricate d. Requires no packing e....

A boiler feedwater stop valve:

A boiler feedwater stop valve: a. Should never be used to control water level b. Is used to isolate the deaerator c. Must be a globe valve d. Should...

Boiler blowoff piping has a specific size range, depending upon:

Boiler blowoff piping has a specific size range, depending upon: a. Water impurities b. The type of boiler c. Boiler capacity d. Operating pressure e....

Which of the following units would the pressure gauge on a steam boiler likely use?

Which of the following units would the pressure gauge on a steam boiler likely use? a. Pascals b. Pascals per square metre c. Kilograms per square...

The purpose of the pipe siphon installed between the boiler and the pressure gauge is to prevent:

The purpose of the pipe siphon installed between the boiler and the pressure gauge is to prevent: a. Air from entering the gauge b. Water from entering...

A steam boiler is regularly blown off in order to:

A steam boiler is regularly blown off in order to: a. Clean the soot and carbon out of the firebox and tubes b. Lower the operating water level in...

When the steam outlet of a boiler is 51mm or larger, the boiler steam outlet stop valve should be a:

When the steam outlet of a boiler is 51mm or larger, the boiler steam outlet stop valve should be a: a. Non-rising stem globe valve b. Rising spindle...

On a multiple steam boiler heating system, a stop valve must be placed at each boiler outlet to:

On a multiple steam boiler heating system, a stop valve must be placed at each boiler outlet to: a. Permit slower system warm-ups b. Allow the boiler...

An essential fitting between the boiler and the steam pressure gauge is a:

An essential fitting between the boiler and the steam pressure gauge is a: a. Check valve b. Gate valve c. Gauge glass d. Siphon e. Steam trap Answer:...

According to code, the scale of a pressure gauge for a steam heating boiler shall be graduated between

According to code, the scale of a pressure gauge for a steam heating boiler shall be graduated between a. 100 to 300 kPa b. 200 to 414 kPa c. 200...

A boiler feedwater stop valve:

A boiler feedwater stop valve: a. Should never be used to control water level b. Is used to isolate the deaerator c. Must be a globe valve d. Should...

The prime importance of boiler fittings is:

The prime importance of boiler fittings is: a. Economics b. To satisfy regulations c. Safety & efficiency d. Convenience e. Ease of operations Answer:...

Boiler blowoff piping:

Boiler blowoff piping: a. Can be reduced in size after the blowdown valves b. Must be full size to the point of discharge c. Must be at least 51 mm...

Combination burners use:

Combination burners use: a. Two different gas burners arrangements b. Two different pilot flames c. Two different fuels d. Two different air supplies Answer:...

Premix Percentage is the another name for:

Premix Percentage is the another name for: a. The quantity of gas in the air/gas mixture b. Primary air c. Secondary air d. The quantity of gas in...

Which features do Motorized Gas Valves have? 1. Slow to open, quick to close 2. Quick to open, slow to close 3. Fail-safe 4. Spring and supply pressure to close 5. Spring and supply pressure to open

Which features do Motorized Gas Valves have?1. Slow to open, quick to close2. Quick to open, slow to close3. Fail-safe4. Spring and supply pressure...

To prevent a furnace puff, larger size solenoid type oil and gas valves usually have a delayed opening action so that it takes __ seconds to open the valve up wide, but they close instantly when de-energized.

To prevent a furnace puff, larger size solenoid type oil and gas valves usually have a delayed opening action so that it takes __ seconds to open the...

Diaphragm Gas Valve is popular as a control valve for?

Diaphragm Gas Valve is popular as a control valve for? a. low capacity gas-fired heating boilers b. high capacity gas-fired heating boilers c. gas...

Which pilots are ignited electrically by means of electrodes?

Which pilots are ignited electrically by means of electrodes? a) interrupted b) intermittent c) continuous d) all of the above e) A and B Answer:...

An ___ pilot is used to light off the main burner but does not burn throughout the burner "on" period.

An ___ pilot is used to light off the main burner but does not burn throughout the burner "on" period. a) interrupted b) intermittent c) automatic d)...

A ____ pilot burns at all times and has to be manually ignited.

A ____ pilot burns at all times and has to be manually ignited.  a) interrupted b) intermittent c) automatic d) manual e) continuous Answer:...

The __________ pilot is most often used on small boilers.

The __________ pilot is most often used on small boilers. a) interrupted b) intermittent c) automatic d) manual e) continuous Answer:...

One of the advantages of the refractory (gas) burner is the

One of the advantages of the refractory (gas) burner is the a) low cost b) gas and air mixture is thoroughly preheated before it enters the furnace c)...

A refractory burner disadvantage is

A refractory burner disadvantage is a) high initial cost b) too much fuel preheat c) low radiant heat d) low combustion efficiency e) overheating...

When an atmospheric gas fired burner is burning fuel properly:

When an atmospheric gas fired burner is burning fuel properly: a. It will have a blue, non-luminous flame b. The furnace will pulsate c. There will...

An atmospheric premix burner has air entering around the flame that is termed:

An atmospheric premix burner has air entering around the flame that is termed: a. Primary air b. Secondary air c. Atomizing air d. Combustion air e....

Atmospheric burners are used for:

Atmospheric burners are used for: a. Gas stoves, hot water heaters, heating furnaces and many heating boilers b. Ring type burners c. Coal firing d....

Large capacity burners:

Large capacity burners: a. Require high flow on ignition b. Are very safe relative to puff-back c. Require only a small pilot flame d. Should have...

The main function of a gas burner is:

The main function of a gas burner is: a. Atomization of the fuel b. A source of ignition c. Provide thorough mixing of the fuel and air d. Regulation...

The Venturi tube in the atmospheric burner mixing head has a:

The Venturi tube in the atmospheric burner mixing head has a: a. Gradually decreasing cross-sectional area b. Gradually increasing cross-sectional...

An atmospheric burner head which is very popular on heating boilers is the:

An atmospheric burner head which is very popular on heating boilers is the: a. Refractory type b. Star type c. Ring type d. Rectangular type e. Ribbon...

A solenoid type fuel valve;

A solenoid type fuel valve; a. Is held closed by fuel pressure b. Always opens rapidly c. Is held closed by electrical current d. Closes slowly e....

Which of the following is NOT a pilot for a gas burner?

Which of the following is NOT a pilot for a gas burner?  a. Continuous b. Intermittent c. Manual d. Interrupted e. Standing Answer:...

An intermittent pilot:

An intermittent pilot: a. Lights the main flame then extinguishes b. Must be manually ignited c. Lights the main flame and remains on until the main...

A very popular packaged boiler gas burner is the:

A very popular packaged boiler gas burner is the: a. Ring burner b. In-duct burner c. Post mix atmospheric burner d. Mechanical atomizing burner e....

Gas burners for heating boilers can be divided into two general classes:

Gas burners for heating boilers can be divided into two general classes: a. Mixing and non-mixing b. Refractory and ribbon-type c. In-shot and up-shot d....

One of the advantages of using natural gas as a fuel in a boiler is:

One of the advantages of using natural gas as a fuel in a boiler is: a. No storage space is required b. Low cost c. Abundance in supplies d. Portability e....

The amount of pre-mix air to an atmospheric burner is typically:

The amount of pre-mix air to an atmospheric burner is typically: a. 10% to 12% b. 5% to 8% c. 20% to 50% d. 30% to 40% e. 100% Answer:...

If the power is cut off to an automatic gas valve, the valve will:

If the power is cut off to an automatic gas valve, the valve will: a. Close slowly b. Close immediately c. De-pressurize the gas train d. Chatter e....

The advantage of a motorized (hydramotor) gas valve is that the valve opens _____, thus preventing "furnace puff".

The advantage of a motorized (hydramotor) gas valve is that the valve opens _____, thus preventing "furnace puff". a. Slowly b. Quickly c. Immediately d....

The purpose of the deflector vanes in the center of a ring (gas) burner is to:

The purpose of the deflector vanes in the center of a ring (gas) burner is to: a. Atomize the gas particles b. Increase the gas velocity c. Decrease...

On a two fixed capacity nozzle system both burners are lit when the system is:

On a two fixed capacity nozzle system both burners are lit when the system is: a. Low fire b. Initial start up c. High fire d. On-off cycling Answer:...

The purpose of a cut off valve is to:

The purpose of a cut off valve is to: a. Prevents too low of an oil pressure to supply the burner b. Cut off the burner is to high c. Relieve the...

The purpose of pressure relief valve on a constant capacity fuel supply is to:

The purpose of pressure relief valve on a constant capacity fuel supply is to: a. Relieve the pressure from the oil line any discharge it to atmosphere b....

A modulating capacity mechanical atomizing oil burner is also called an?

A modulating capacity mechanical atomizing oil burner is also called an? a. Constant capacity b. Steam atomized c. Wide range atomizer d. Centrifugal...

An air atomizing compressor is usually

An air atomizing compressor is usually a) a variable displacement type b) a centrifugal type c) an axial type d) a positive displacement type e) a...

A time delay oil valve

A time delay oil valve a) opens when the pump starts b) opens once ignition is verified c) opens on flame failure d) is located on the return line e)...

A relief valve is placed on the discharge of a fuel oil pump

A relief valve is placed on the discharge of a fuel oil pump a) because the pump is a dynamic type b) so burner design pressure is not exceeded c)...

Oil burners can be divided into three classes:

Oil burners can be divided into three classes: 1. air and steam atomizing burners 2. mechanical or pressure atomizing burners 3. centrifugal or rotary...

The reducing of oil into very small particles is termed

The reducing of oil into very small particles is termed a) fluidization b) fractionation c) turbulence d) atomization e) distillation Answer:...

An atomizing air compressor is usually:

An atomizing air compressor is usually: a. A variable displacement type b. A centrifugal type c. An axial type d. A small, rotary air compressor e....

When using mechanical fuel oil atomization:

When using mechanical fuel oil atomization: a. 70 kPa steam pressure is required at the burner b. Dry saturated steam or superheated steam should...

The design capacity of a constant capacity mechanical atomizer is a function of:

The design capacity of a constant capacity mechanical atomizer is a function of: a. Orifice size b. Pump speed c. Pump size d. Supply pressure e....

The pressure range for pressure-atomizing burners fired with light fuel oil is approximately:

The pressure range for pressure-atomizing burners fired with light fuel oil is approximately: a. 50 to 100 kPa b. 150 to 250 kPa c. 300 to 550 kPa d....

The compressed air used as atomizing air in the air atomizing oil burner is also called:

The compressed air used as atomizing air in the air atomizing oil burner is also called: a. Secondary air b. Primary air c. Pre-mixed air d. Combustion...

The two basic varieties of mechanical atomizing oil burners are the:

The two basic varieties of mechanical atomizing oil burners are the: a. Variable capacity and modulating burners b. Constant and variable capacity...

To prevent the possibility of a furnace explosion, it is important that the furnace is _____ before the igniter is energized and fuel is supplied to the burner nozzle(s).

To prevent the possibility of a furnace explosion, it is important that the furnace is _____ before the igniter is energized and fuel is supplied to...

When a greater than normal amount of combustible mixture is ignited, the result may be:

When a greater than normal amount of combustible mixture is ignited, the result may be: a. A boiler explosion b. A puff-back c. A negative furnace...

Intermediate and high fire burner nozzles have higher capacities than the primary burner nozzle:

Intermediate and high fire burner nozzles have higher capacities than the primary burner nozzle: a. To give greater firing variations b. To prevent...

A multi-burner cluster has secondary and tertiary nozzles ignited by:

A multi-burner cluster has secondary and tertiary nozzles ignited by: a. An igniter spark b. An intermittent pilot flame c. An interrupted pilot d....

Before being pumped to the burner, heavy oils are heated to approximately:

Before being pumped to the burner, heavy oils are heated to approximately: a. 203°C b. 95°C c. 115°C d. 75°C e. 150°C Answer: ...

To which of the following oil burners is the oil supplied under high pressure?

To which of the following oil burners is the oil supplied under high pressure? a. Mechanical atomizing burner b. Air atomizing burner c. Rotary cup...

An air atomizing burner utilizes an air pressure of approximately:

An air atomizing burner utilizes an air pressure of approximately: a. 15 kPa b. 150 kPa c. 75 kPa d. 95 kPa e. 100 kPa Answer:...

Regulations require that the minimum distance between an oil-fired furnace and an indoor oil storage tank must be:

Regulations require that the minimum distance between an oil-fired furnace and an indoor oil storage tank must be: a. 7 m b. 5.2 m c. 2.1 m d. 4.7...

A time delay oil valve:

A time delay oil valve: a. Opens when the oil pump starts b. Opens 5 to 15 seconds after ignition begins. c. Opens on flame failure d. Is located...

A modulating pressure atomizer has its return oil flow regulated by:

A modulating pressure atomizer has its return oil flow regulated by: a. A modulating valve to the burner b. A modulating valve in the return line c....

Which of the following is NOT a type of oil burner?

Which of the following is NOT a type of oil burner?  a. Atmospheric burners b. Steam atomizing burners c. Mechanical or pressure atomizing burners d....

Maximum static pressure in a fuel oil line before the oil pump is limited by code to approximately:

Maximum static pressure in a fuel oil line before the oil pump is limited by code to approximately: a. 10 kPa b. 15 kPa c. 80 kPa d. 35 kPa e. 70...

The cast-iron sectional boiler is generally used for steam and hot water heating systems in

The cast-iron sectional boiler is generally used for steam and hot water heating systems in  a. Small sized buildings b. Medium sized buildings c....

Cast-iron boiler capacity

Cast-iron boiler capacity a) is very large compared to steel boilers b) can be increased by simply adding sections c) cannot be increased once assembly...

To prevent flue gases from escaping in a cast iron sectional boiler, the spaces between the sections are sealed with high temperature

To prevent flue gases from escaping in a cast iron sectional boiler, the spaces between the sections are sealed with high temperature a) silicon chalking b)...

The sections of cast iron boilers are mainly designed to obtain maximum

The sections of cast iron boilers are mainly designed to obtain maximum a) water space b) steam space c) water circulation d) heat transfer e) steam...

Cast-iron boiler sections maximize heat transfer by

Cast-iron boiler sections maximize heat transfer by a) utilizing as few passes as possible b) vertical firing c) exposing as large a surface as...

A disadvantage of a cast iron boiler is:

A disadvantage of a cast iron boiler is: a. It is subject to corrosion b. Its difficult assembly c. Its extremely high cost d. Its efficiency e....

Boiler water legs:

Boiler water legs: a. Increase the radiant heating surface b. Surround the furnace entirely c. Make water treatment less critical d. Support the...

One advantage of cast iron boilers is:

One advantage of cast iron boilers is: a. Their high factor of brittleness b. Reduced vibration due to their heavy foundations c. Unlimited operating...

The ratio of heat released to heat transferred to boiler water is known as:

The ratio of heat released to heat transferred to boiler water is known as: a. Combustion efficiency b. Heating surface efficiency c. Boiler efficiency d....

The steam and water spaces of a cast iron sectional boiler are connected by:

The steam and water spaces of a cast iron sectional boiler are connected by: a. Tie rods b. Tie nipples c. Hydraulic jacks d. Steel studs e. Push...

Modular cast iron boiler water flow is:

Modular cast iron boiler water flow is: a. Continuous through all modules b. Connected in series c. Intermittent, occurring only while the unit is...

In a vertical sectional boiler, the sections are placed:

In a vertical sectional boiler, the sections are placed: a. One above the other b. Side by side c. On the furnace d. Above the draft hood e. 180°...

The fins cast on the flat surface of the sections of a cast iron sectional boiler are used for the purpose of increasing the:

The fins cast on the flat surface of the sections of a cast iron sectional boiler are used for the purpose of increasing the: a. Effectiveness of...

Heating boilers attain maximum efficiency only when they are operated:

Heating boilers attain maximum efficiency only when they are operated: a. Intermittently at 90% of the load b. Intermittently at half load c. Continuously...

In a cast iron modular heating boiler, the operation of the burner of each module is controlled by a _____ that starts or stops modules in sequence as load demand increases or decreases.

In a cast iron modular heating boiler, the operation of the burner of each module is controlled by a _____ that starts or stops modules in sequence...

Most low capacity cast iron boilers:

Most low capacity cast iron boilers: a. Cannot be site assembled b. Can withstand higher pressures c. Will pass through standard size doorways d....

The sections of a cast iron sectional boiler are held together by:

The sections of a cast iron sectional boiler are held together by: a. Cast iron pipes b. High-temperature rope c. Steel studs d. Push nipples and...

The common standard control modes for a plant control system are

The common standard control modes for a plant control system are a) integral and derivative b) proportional and reset c) proportional, reset, and...

A typical use of a mainframe computer system in a process would be

A typical use of a mainframe computer system in a process would be a) the operation of a modulating control valve b) acting as a "host" computer c)...

A computer normally displays information to the operator via

A computer normally displays information to the operator via a. a CRT or LCD b. an icon c. a CAD d. a Modem e. a CPU Answer:...

The main function of a mainframe computer system is to:

The main function of a mainframe computer system is to: a. Evaluate systems by comparison b. Rapidly process large amounts of data c. Perform only...

The type of circuit used to store (write) and retrieve (read) information from a computer is known as its:

The type of circuit used to store (write) and retrieve (read) information from a computer is known as its: a. Bytes b. Motherboard c. RAM d. CPU e....

Run time totals, recorded by a computer, are commonly used:

Run time totals, recorded by a computer, are commonly used: a. In graphic displays b. For inventory control c. For logic supervisory systems d. For...

Digital output signals are processed by _____ before an analog controls can react to them.

Digital output signals are processed by _____ before an analog controls can react to them. a. Digital receivers b. Logic controllers c. Modems d....

A device used to convert audio tones to computer language is a:

A device used to convert audio tones to computer language is a: a. Transmitter b. Multiplexer c. Plotter d. Modulator/demodulator e. CPU Answer:...

Data cannot be permanently stored on a

Data cannot be permanently stored on a a. CD-ROM b. Hard disk c. CPU d. Monitor e. DVD-ROM Answer:...

An analog control loop output must be put through a _____ before the computer can react to the signal.

An analog control loop output must be put through a _____ before the computer can react to the signal. a. Digital converter b. Signal inverter c....

Transmitters that transmit digital codes directly to a computer are known as:

Transmitters that transmit digital codes directly to a computer are known as: a. Digital transmitters b. Smart transmitters c. Analog transmitters d....

A multiplexing sequence may be repeated as frequently as

A multiplexing sequence may be repeated as frequently as a. Once per hour b. Twice per minute c. Twice per second d. Four times or more per second e....

A process computer connected to digital inputs is protected from harmful voltages by means of:

A process computer connected to digital inputs is protected from harmful voltages by means of: a. Splitter bars b. Fuses c. Isolating circuits d....

Soft keying is:

Soft keying is: a. Done only with laptop computers b. Done to make the computer quicker and easier to use c. A method of pressing a key twice before...

Sharing and transferring information between computers is termed:

Sharing and transferring information between computers is termed: a. Central processing b. Multiplexing c. Plotting d. Number crunching e. Networking Answer:...

Which of the following would be the best choice for a powerhouse control-room installation?

Which of the following would be the best choice for a powerhouse control-room installation?  a. A minicomputer b. A mainframe computer c. A...

Inputs for logic and supervisory computer functions are mainly:

Inputs for logic and supervisory computer functions are mainly: a. By switch contacts b. Actions of an operator using the keyboard c. Stored on a...

The main component of any computer is the:

The main component of any computer is the: a. Keyboard b. Screen c. Modem d. Printer e. Central processing unit Answer:...

When personal computers are linked together and information flows between them, it is called:

When personal computers are linked together and information flows between them, it is called: a. Telecommunicating b. Networking c. Teleconferencing d....

Which of the following is a programming language?

Which of the following is a programming language? a. English b. Word c. Desktop publishing d. Latin e. Pascal Answer:...

A lockout switch will energize after __ to __ seconds.

A lockout switch will energize after __ to __ seconds. a. 5 to 10 b. 15 to 30 c. 10 to 15 d. 20 to 40 e. 15 to 25 Answer:...

On-off controls are common on?

On-off controls are common on? a. firetube boilers b. watertube boilers c. small package boilers d. large package boilers e. all of the above Answer:...

If the damper motor does not operate on a boiler which one would NOT be the possible cause?

If the damper motor does not operate on a boiler which one would NOT be the possible cause? a. Damper positioning switch in wrong position. b. Linkage...

If the burner stays on low fire on a boiler which one would NOT be the possible cause?

If the burner stays on low fire on a boiler which one would NOT be the possible cause? a. Boiler pressure above high-low fire control setting. b....

If shutdown occurs during firing a boiler which one would NOT be the possible cause?

If shutdown occurs during firing a boiler which one would NOT be the possible cause? a. Loss or stoppage of fuel b. Defective fuel valve, loose electrical...

If pilot or low-fire flame occurs in a boiler which one would NOT be the possible cause?

If pilot or low-fire flame occurs in a boiler which one would NOT be the possible cause? a. Low fire switch open. b. Insufficient pilot or low fire...

If no ignition occurs when starting a boiler which one would NOT be the possible cause?

If no ignition occurs when starting a boiler which one would NOT be the possible cause? a. Lack of spark. b. Insufficient pilot or low fire flame. c....

If a blower does not start which one would NOT be the possible cause?

If a blower does not start which one would NOT be the possible cause? a. Main disconnect switch open. b. Blown fuses, tripped overloads, loose electrical...

On a boiler with high-low fire control, if the damper positioning switch is in the wrong position

On a boiler with high-low fire control, if the damper positioning switch is in the wrong position a) the damper motor may not operate b) a pre-purge...

The second from last step in an automatic boiler programmed shutdown sequence is

The second from last step in an automatic boiler programmed shutdown sequence is a) timer shutdown b) main flame trial c) post purge d) operating...

The operating pressure control will control the

The operating pressure control will control the a) steam pressure in the boiler b) gas pressure to the burner c) water pressure to the boiler d) boiler...

The function of a programming control is

The function of a programming control is a) to supervise feedwater supply to the boiler b) to regulate the fuel supply to the burner c) to regulate...

Automatic boiler programming controls

Automatic boiler programming controls a) must incorporate a modulating control system b) do not require interlocking devices c) require an ON-OFF...

When an automatic unattended boiler starts up, the program timer will first:

When an automatic unattended boiler starts up, the program timer will first: a. Energize the ignition transformer and pilot gas solenoid valve b....

The timer of a programmed combustion control consists of a motor and a:

The timer of a programmed combustion control consists of a motor and a: a. Bellows b. A nozzle and vane assembly c. Number of cams and switches d....

If a shutdown occurs during normal firing of a boiler and the steam pressure is below the normal cutout value, the problem could be:

If a shutdown occurs during normal firing of a boiler and the steam pressure is below the normal cutout value, the problem could be: a. An interlock,...

On a gas fired automatic boiler a normal programmed start-up takes approximately:

On a gas fired automatic boiler a normal programmed start-up takes approximately: a. 105 seconds b. 55 seconds c. 27 - 40 seconds d. 120 seconds e....

If during the pilot trial for ignition period, the pilot does not ignite, a lockout will occur

If during the pilot trial for ignition period, the pilot does not ignite, a lockout will occur a. If the trial for ignition period has lasted approximately...

After extinguishing the main flame, the next step in a programmed burner shutdown is

After extinguishing the main flame, the next step in a programmed burner shutdown is a. The timer motor stops b. The main flame trial ends c. A post-purge...

An interrupted pilot of an automatic boiler:

An interrupted pilot of an automatic boiler: a. Burns continuously, like that in a home furnace b. Ignites before the main burner ignites, and is...

During a programmed start-up if an igniter spark is visible but no flame appears the operator should suspect:

During a programmed start-up if an igniter spark is visible but no flame appears the operator should suspect: a. A boiler low water level b. The...

Boiler furnaces are purged:

Boiler furnaces are purged: a. So that the programmer has time to verify permissiveness b. So that combustion gases are fully removed prior to ignition c....

If the pilot flame is adequate but the main burner fails to ignite, the programmer must:

If the pilot flame is adequate but the main burner fails to ignite, the programmer must: a. Hold the program in its present state b. Recycle the...

The manual fuel shut-off valves of an automatic oil-fired boiler must be opened

The manual fuel shut-off valves of an automatic oil-fired boiler must be opened a. Prior to pre-purging b. After pre-purging and just prior to pilot...

The programmer will go through a post purge:

The programmer will go through a post purge: a. Only if pilot fails to ignite b. Only on flame failure c. By manually advancing the timer d. On any...

During the start-up of a boiler equipped with an automatic control system and flame scanning device, the main burner safety shut-off valve:

During the start-up of a boiler equipped with an automatic control system and flame scanning device, the main burner safety shut-off valve: a. Must...

With an automatic oil-fired boiler programmed control, a typical firing period begins approximately:

With an automatic oil-fired boiler programmed control, a typical firing period begins approximately: a. 44 seconds after FD fan starts b. 75 seconds...

At the end of the pre-purge period, the combustion programmer:

At the end of the pre-purge period, the combustion programmer: a. Shuts down b. Opens the main fuel valve c. Closes the pilot valve d. Ends the ignition...

On a steam boiler with single element feedwater control, the following item is measured:

On a steam boiler with single element feedwater control, the following item is measured: a) steam flow b) feedwater flow c) boiler water level d)...

In a two element feedwater control the following items are measured:

In a two element feedwater control the following items are measured: a) boiler water level and steam flow b) feedwater flow and steam flow c) boiler...

A boiler control transfer or selector station

A boiler control transfer or selector station a) can be used to manually override automatic control loops b) can be changed from manual to automatic...

With single element feedwater control the level transmitter output is

With single element feedwater control the level transmitter output is a) received by a final element b) proportional to drum level c) sent to a selector...

Boiler modulating feedwater control flow rate depends on

Boiler modulating feedwater control flow rate depends on a) level set point b) control valve position c) actual level d) feedwater pressure e) set...

Which of the following is a flame sensing device?

Which of the following is a flame sensing device? a) thermopile b) heat sensing control c) stack relay d) cut-off valve e) scanner Answer:...

The function of a flame failure device is to

The function of a flame failure device is to a) shut off the fuel supply when the pressure gets too high b) shut off the fuel when the burner flame...