STATIONARY ENGINEER BOILER LATEST EXAM | QUESTIONS
AND ANSWERS | VERIFIED ANSWERS (100% CORRECT) | LATEST
EXAM UPDATE
Pressure gauges should never have a range less than
A. half the safety valve set pressure.
B. double the safety valve set pressure.
C. 3/4 times the safety valve set pressure.
D. 1 1/2 times the safety valve set pressure. - CORRECT ANSWER- D. 1 1/2
times the safety valve set pressure.
After water is blown out of a siphon, why should live steam never be allowed to
enter a Bourdon tube?
A. The steam will rupture the siphon tube.
B. Combustion gases will mix with the steam.
C. Live steam will damage the pressure gauge.
D. The water level gauge will be damaged or destroyed. - CORRECT
ANSWER- C. Live steam will damage the pressure gauge.
All of the following are essential to maintain the proper fuel oil pressure with
fuel oil accessories EXCEPT
A. achieving the right flow of fuel.
B. proper atomization of the fuel oil.
C. heating fuel oil to the correct temperature.
D. obtaining the correct difference in pressure inside and outside the boiler. -
CORRECT ANSWER- D. obtaining the correct difference in pressure inside
and outside the boiler.
,Which of the following could be dangerous to safe operation of a low pressure
boiler?
A. Adding water to an operating boiler when the water level cannot be seen in
the gauge glass tube.
B. Opening the blowdown valve at the bottom of the water gauge glass before
making a water level reading.
C. Checking the water level using the try cocks valves when the line to the glass
gauge tube is clogged.
D. Opening the water column blowdown valve every day. - CORRECT
ANSWER- A. Adding water to an operating boiler when the water level cannot
be seen in the gauge glass tube.
Which of the following is best if a low-pressure boiler does not have an air
vent?
A. Vent the boiler with the try cocks.
B. Vent the boiler with the safety valve.
C. Vent the boiler with the fusible plug.
D. Vent the boiler with the blowdown line. - CORRECT ANSWER- A. Vent
the boiler with the try cocks.
What is the purpose of an evaporation test on a low pressure boiler?
A. To test the water column
B. To test the bottom blowdown valve
C. To test the steam pressure safety valve
D. To test the low water cutoff control. - CORRECT ANSWER- D. To test the
low water cutoff control.
Following flame failure, controls must de-energize fuel and ignition circuits
A. within 4 seconds.
B. within 6 seconds.
,C. within 10 seconds.
D. within 15 seconds. - CORRECT ANSWER- A. within 4 seconds.
How can an operator prevent damage to the tubes while using a cleaner to
remove scale from boiler tubes?
A. Never use a chemical cleaning procedure.
B. Never use cleaning water under pressure.
C. Never allow the cleaner to stay in one place.
D. Never clean the tubes more often than every six months. - CORRECT
ANSWER- C. Never allow the cleaner to stay in one place.
In a steam boiler, which of the following should never be placed between the
safety relief valve and the boiler?
A. A steam trap
B. A shut-off valve
C. An air eliminator
D. A discharge pipe - CORRECT ANSWER- B. A shut-off valve
Which of these should be used on live electrical fires?
A. Class D extinguishers
B. Class C extinguishers
C. Class B extinguishers
D. Class A extinguishers - CORRECT ANSWER- B. Class C extinguishers
If certain grades of fuel oil are not preheated properly, they may cause
A. higher temperatures in the furnace.
B. back pressure and leaks in the fuel lines.
C. poor combustion and high fuel consumption.
, D. increased pressure and dangerous levels of steam. - CORRECT ANSWER-
C. poor combustion and high fuel consumption.
The furnace is almost always in a ___________ pressure.
Negative
Positive - CORRECT ANSWER- Negative
In an open feedwater heater or de-aerating feedwater tank, a clogged vent line
will _______ air/non-condensables in feedwater.
Increase
Decrease - CORRECT ANSWER- Increase
Reciprocating pump- rated by diameter of piston. 4x2x4 pump. The first number
is the diameter of the ___________. The second number is the diameter of the
______. The third number is the length of ________. - CORRECT ANSWER-
steam piston, water piston, stroke
Suction valve on reciprocating pump allows water into the ______ and keeps it
from backing up into the ______ line. If suction water is too hot the pump will
become steam bound. - CORRECT ANSWER- cylinder, suction
Horizontal split case centrifugal pump- center eye of impeller is ________
suction pressure. _________ is the formation and collapse of vapor bubbles
which will cause vibration and noise. Caused by __________ water temp or low
pressure. Vibration causes damage. - CORRECT ANSWER- Lowest,
Cavitation, high
Condensate system has ________ vent on top. Condensate is treated to get rid
of ____________. - CORRECT ANSWER- atmospheric, carbonic acid
AND ANSWERS | VERIFIED ANSWERS (100% CORRECT) | LATEST
EXAM UPDATE
Pressure gauges should never have a range less than
A. half the safety valve set pressure.
B. double the safety valve set pressure.
C. 3/4 times the safety valve set pressure.
D. 1 1/2 times the safety valve set pressure. - CORRECT ANSWER- D. 1 1/2
times the safety valve set pressure.
After water is blown out of a siphon, why should live steam never be allowed to
enter a Bourdon tube?
A. The steam will rupture the siphon tube.
B. Combustion gases will mix with the steam.
C. Live steam will damage the pressure gauge.
D. The water level gauge will be damaged or destroyed. - CORRECT
ANSWER- C. Live steam will damage the pressure gauge.
All of the following are essential to maintain the proper fuel oil pressure with
fuel oil accessories EXCEPT
A. achieving the right flow of fuel.
B. proper atomization of the fuel oil.
C. heating fuel oil to the correct temperature.
D. obtaining the correct difference in pressure inside and outside the boiler. -
CORRECT ANSWER- D. obtaining the correct difference in pressure inside
and outside the boiler.
,Which of the following could be dangerous to safe operation of a low pressure
boiler?
A. Adding water to an operating boiler when the water level cannot be seen in
the gauge glass tube.
B. Opening the blowdown valve at the bottom of the water gauge glass before
making a water level reading.
C. Checking the water level using the try cocks valves when the line to the glass
gauge tube is clogged.
D. Opening the water column blowdown valve every day. - CORRECT
ANSWER- A. Adding water to an operating boiler when the water level cannot
be seen in the gauge glass tube.
Which of the following is best if a low-pressure boiler does not have an air
vent?
A. Vent the boiler with the try cocks.
B. Vent the boiler with the safety valve.
C. Vent the boiler with the fusible plug.
D. Vent the boiler with the blowdown line. - CORRECT ANSWER- A. Vent
the boiler with the try cocks.
What is the purpose of an evaporation test on a low pressure boiler?
A. To test the water column
B. To test the bottom blowdown valve
C. To test the steam pressure safety valve
D. To test the low water cutoff control. - CORRECT ANSWER- D. To test the
low water cutoff control.
Following flame failure, controls must de-energize fuel and ignition circuits
A. within 4 seconds.
B. within 6 seconds.
,C. within 10 seconds.
D. within 15 seconds. - CORRECT ANSWER- A. within 4 seconds.
How can an operator prevent damage to the tubes while using a cleaner to
remove scale from boiler tubes?
A. Never use a chemical cleaning procedure.
B. Never use cleaning water under pressure.
C. Never allow the cleaner to stay in one place.
D. Never clean the tubes more often than every six months. - CORRECT
ANSWER- C. Never allow the cleaner to stay in one place.
In a steam boiler, which of the following should never be placed between the
safety relief valve and the boiler?
A. A steam trap
B. A shut-off valve
C. An air eliminator
D. A discharge pipe - CORRECT ANSWER- B. A shut-off valve
Which of these should be used on live electrical fires?
A. Class D extinguishers
B. Class C extinguishers
C. Class B extinguishers
D. Class A extinguishers - CORRECT ANSWER- B. Class C extinguishers
If certain grades of fuel oil are not preheated properly, they may cause
A. higher temperatures in the furnace.
B. back pressure and leaks in the fuel lines.
C. poor combustion and high fuel consumption.
, D. increased pressure and dangerous levels of steam. - CORRECT ANSWER-
C. poor combustion and high fuel consumption.
The furnace is almost always in a ___________ pressure.
Negative
Positive - CORRECT ANSWER- Negative
In an open feedwater heater or de-aerating feedwater tank, a clogged vent line
will _______ air/non-condensables in feedwater.
Increase
Decrease - CORRECT ANSWER- Increase
Reciprocating pump- rated by diameter of piston. 4x2x4 pump. The first number
is the diameter of the ___________. The second number is the diameter of the
______. The third number is the length of ________. - CORRECT ANSWER-
steam piston, water piston, stroke
Suction valve on reciprocating pump allows water into the ______ and keeps it
from backing up into the ______ line. If suction water is too hot the pump will
become steam bound. - CORRECT ANSWER- cylinder, suction
Horizontal split case centrifugal pump- center eye of impeller is ________
suction pressure. _________ is the formation and collapse of vapor bubbles
which will cause vibration and noise. Caused by __________ water temp or low
pressure. Vibration causes damage. - CORRECT ANSWER- Lowest,
Cavitation, high
Condensate system has ________ vent on top. Condensate is treated to get rid
of ____________. - CORRECT ANSWER- atmospheric, carbonic acid
