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

Just before entering the waterside of the boiler it is important to

Just before entering the waterside of the boiler it is important to

a) notify the inspector in writing of your intent to do so
b) ensure the chief engineer is aware of your intent
c) be wearing self contained breathing apparatus (SCBA)
d) test the atmosphere with an oxygen "sniffer"
e) obtain permission to do so from plant management





Answer: D

What pressure is a boiler subjected to during a hydrostatic test?

What pressure is a boiler subjected to during a hydrostatic test?

a. Operating pressure
b. 1/2 of normal operating pressure
c. 1 1/2 times maximum allowable working pressure
d. 1/2 times design pressure
e. 2 times the setting of the lowest set safety valve






Answer: C

An inhibitor, when added to acid, will:

An inhibitor, when added to acid, will:

a. Prevent or minimize the effect of the acid on the boiler metal
b. Make the acid compatible with the sewer system for disposal
c. Strengthen the acid, thereby shortening the cleaning procedure
d. Neutralize the acid residue remaining on the boiler metal after a chemical cleaning
e. Cause foaming in the boiler





Answer: A

A chemical method used in boiler cleaning and treatment which requires vigilant control and monitoring is:

A chemical method used in boiler cleaning and treatment which requires vigilant control and monitoring is:

a. Chelates
b. Trisodium phosphate
c. Sodium hydroxide
d. Caustic soda
e. Hydrazine








Answer: A

A hydrostatic test should be applied to a boiler:

A hydrostatic test should be applied to a boiler:

a. At the request of the boiler inspector
b. Once per year
c. Once per week
d. Every shift
e. At the request of the owner




Answer: A

The most popular acid for boiler cleaning is:

The most popular acid for boiler cleaning is:

a. Sulphuric
b. Hydrochloric
c. Phosphoric
d. Nitric
e. Sulphamic







Answer: B

Chemical cleaning of smaller boilers is not usually done because:

Chemical cleaning of smaller boilers is not usually done because:

a. Of the small surface area that the chemical contacts
b. Of the thin boiler metal
c. They cannot adequately support the high density chemicals
d. It is impossible to achieve adequate chemical circulation
e. The cost is not justified







Answer: E

Prior to a worker entering the steam drum of an off-line boiler that is connected to a common, pressurized steam header, the

Prior to a worker entering the steam drum of an off-line boiler that is connected to a common, pressurized steam header, the

a. Worker must be equipped with the correct tools and a list of required repairs
b. Worker must be provided with a safety kit for confined space entry
c. Worker must be provided with a safety line, first aid kit, and hard hat
d. Main steam, blowdown and feedwater valves must be closed, locked and tagged
e. Drum must be vented, the safety valve must be gagged, and all ash and soot removed from the fire box






Answer: D

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 exterior of the tubes are in good condition
d. Must be done after the boiler has been drained
e. May include making sure the tubes are free of scale







Answer: A

When a boiler is removed from service, it can be drained once the temperature reaches approximately:

When a boiler is removed from service, it can be drained once the temperature reaches approximately:

a. 150°C
b. 30°C
c. 50°C
d. 90°C
e. 70°C







Answer: D

For an alkaline boil out, a boiler is fired and maintained under steam pressure for about:

For an alkaline boil out, a boiler is fired and maintained under steam pressure for about:

a. 12 hours
b. 8 hours
c. 16 hours
d. 48 hours
e. 24 hours





Answer: D

The recommended inspection procedures for a power boiler are outlined in the:

The recommended inspection procedures for a power boiler are outlined in the:

a. CSA B51 Boiler, Pressure Vessel and Pressure Piping Code
b. ANSI B31.1 Power Piping Code
c. ASME Boiler and Pressure Vessel Code, Section I
d. ASME Boiler and Pressure Vessel Code, Section IV
e. ASME Boiler and Pressure Vessel Code, Section VII






Answer: E

One of the legal responsibilities of the engineer during an inspection is:

One of the legal responsibilities of the engineer during an inspection is:

a. To notify the Workers' Compensation Board of the inspection
b. Point out any known or suspected defects to the inspector
c. To have at least two staff members present at all times
d. To allow the inspector onto the premises, but only during working hours
e. To be in possession of an inspection certificate






Answer: B