Power Engineering - 4B4 Practice Questions With Complete
Solutions
"SOP" stands for
a. Special Operating Procedure
b. Standard Operating Procedure
c. Simplified Operating Practices
d. Simplified Operating Procedure Correct Answers b. Standard
Operating Procedure
A boiler boil-out
a. is done with an alkaline solution.
b. must be done annually.
c. is done before curing the refractory.
d. is done at 1.5 times the maximum allowable working
pressure. Correct Answers a. is done with an alkaline solution.
A boiler furnace pre-purge:
a. Happens after the ignition transformer is energized.
b. Can occur even if the boiler has a low water condition.
c. Happens only when the draft fans are at low speed.
d. Must last a specific amount of time. Correct Answers d. Must
last a specific amount of time.
A boiler pressure explosion is NOT caused by:
a. Scale and sludge build-up
b. Overheating
,c. Insufficient combustion air
d. Thermal shock Correct Answers c. Insufficient combustion
air
A boiler pressure 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 a defective flame scanner Correct Answers
c. May be caused by a low water condition
A fast-closing valve that automatically and completely shuts off
the fuel supply, in response to an operating limit or a safety
limit, is a
a. test firing valve
b. firing rate control valve
c. safety shut-off valve
d. schrader valve Correct Answers c. safety shut-off valve
A high water level in a boiler:
a. Will cause the high water cut-off to shut down the boiler
b. Is usually caused by a boiler feed pump malfunction
c. Will necessitate an immediate shutdown and cool down
d. May cause water carryover into the header Correct Answers
d. May cause water carryover into the header
A light fuel oil flame should
, a. impinge on the refractory, to stabilize ignition.
b. be bright yellow, with orange at the tips of the flame.
c. be predominantly blue, with orange at the tips of the flame.
d. be bright yellow, with smoke at the tips of the flame. Correct
Answers b. be bright yellow, with orange at the tips of the
flame.
A power boiler in steam service has a safety valve set to 2000
kPa. What should the maximum operating pressure be for this
boiler?
a. 1800 kPa.
b. 2000 kPa.
c. 1950 kPa.
d. 1990 kPa. Correct Answers a. 1800 kPa.
A slow drain test is performed to
a. check the operation of the blowoff tank and quenching water
system
b. check the blowoff valves and blowoff line for obstruction
c. check the operation of a low water cut-off
d. check the operation of a feedwater control valve Correct
Answers c. check the operation of a low water cut-off
A typical natural gas flame should be
a. asymmetrical, and as close as possible to the heat transfer
surfaces.
b. bright yellow, with orange tips.
c. blue, with orange at the tip of the flame
Solutions
"SOP" stands for
a. Special Operating Procedure
b. Standard Operating Procedure
c. Simplified Operating Practices
d. Simplified Operating Procedure Correct Answers b. Standard
Operating Procedure
A boiler boil-out
a. is done with an alkaline solution.
b. must be done annually.
c. is done before curing the refractory.
d. is done at 1.5 times the maximum allowable working
pressure. Correct Answers a. is done with an alkaline solution.
A boiler furnace pre-purge:
a. Happens after the ignition transformer is energized.
b. Can occur even if the boiler has a low water condition.
c. Happens only when the draft fans are at low speed.
d. Must last a specific amount of time. Correct Answers d. Must
last a specific amount of time.
A boiler pressure explosion is NOT caused by:
a. Scale and sludge build-up
b. Overheating
,c. Insufficient combustion air
d. Thermal shock Correct Answers c. Insufficient combustion
air
A boiler pressure 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 a defective flame scanner Correct Answers
c. May be caused by a low water condition
A fast-closing valve that automatically and completely shuts off
the fuel supply, in response to an operating limit or a safety
limit, is a
a. test firing valve
b. firing rate control valve
c. safety shut-off valve
d. schrader valve Correct Answers c. safety shut-off valve
A high water level in a boiler:
a. Will cause the high water cut-off to shut down the boiler
b. Is usually caused by a boiler feed pump malfunction
c. Will necessitate an immediate shutdown and cool down
d. May cause water carryover into the header Correct Answers
d. May cause water carryover into the header
A light fuel oil flame should
, a. impinge on the refractory, to stabilize ignition.
b. be bright yellow, with orange at the tips of the flame.
c. be predominantly blue, with orange at the tips of the flame.
d. be bright yellow, with smoke at the tips of the flame. Correct
Answers b. be bright yellow, with orange at the tips of the
flame.
A power boiler in steam service has a safety valve set to 2000
kPa. What should the maximum operating pressure be for this
boiler?
a. 1800 kPa.
b. 2000 kPa.
c. 1950 kPa.
d. 1990 kPa. Correct Answers a. 1800 kPa.
A slow drain test is performed to
a. check the operation of the blowoff tank and quenching water
system
b. check the blowoff valves and blowoff line for obstruction
c. check the operation of a low water cut-off
d. check the operation of a feedwater control valve Correct
Answers c. check the operation of a low water cut-off
A typical natural gas flame should be
a. asymmetrical, and as close as possible to the heat transfer
surfaces.
b. bright yellow, with orange tips.
c. blue, with orange at the tip of the flame
