Boiler Exam
Study Guide
Questions
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, boiler exam study guide 1
1.0.433: The pressure at the base of a vertical foot of water is ___ psi.
2.1 ½ times the safety valve setting: When performing a hydrostatic test, the pressure on the
boiler should be increased to ___.
3.1 ½ to 2 times the safety valve setting: A boiler steam pressure gauge should have a range of
___.
4.2 ½: The maximum size of the bottom blowdown line and the surface blowdown line is ___".
5.3: During startup, the boiler vent should remain open until a pressure of approximately ___ psi
is on the boiler.
6.6: No. ___ fuel oil must be heated to reach the required temperature for combustion.
7.6: No. ___ fuel oil must be heater in order to be pumped.
8.6: Fuel oil heaters must be used when burning No. ___ fuel oil.
9.8.3: Water weighs approximately ___ lb/gal.
10.15: In order to burn 1 lb of fuel, approximately ___ lb of air are needed.
11.15 psi: A low pressure steam boiler has a maximum allowable working pressure (MAWP) of up
to ___.
12.20,000 lb of water/hr: A boiler generating 20,000 lb of steam/hr must be supplied with at
least ___.
13.21; 79: Air needed for the combustion of fuel is made up of approximately ___% oxygen and
___% nitrogen.
14.75% to 85% of the line pressure: The automatic nonreturn valve on a boiler being cut in on a
line should be opened when the steam pressure on the boiler reaches ___.
15.a boiler explosion: A sudden drop in boiler steam pressure without a corresponding drop in
boiler water temperature could result in ___.
16.a continuous flow of steam: Superheater tubes are protected from warping or burning out by
___.
17.a firetube boiler: Because of the large volume of water, the boiler most likely to cause a boiler
explosion is ___.
18.a firetube boiler (high or low pressure): Stays and braces are needed to prevent bulging in ___.
19.a hydrostatic test: After a boiler has had major repair work made on its steam or water side or
has developed a low water condition, it should be subjected to ___.
20.a large pressure drop: An indication of a dirty fuel oil strainer would be ___ across the
strainer.
21.a loss of air for combustion and lower boiler efficiency: If air supplied for combustion mixes
with gases of combustion, it could lead to ___.
22.a nonadhering sludge: Chemicals added to the boiler water change the scale-forming salts into
___.
23.a possible furnace explosion: The purpose of a flame failure control is to protect the boiler
from ___.
24.a prepurge period: To eliminate the danger of a furnace explosion during startup, the firing
sequence must first allow for ___.
25.a secondary means of determining water level in a boiler.: Try cocks are ___.
26.a siphon: The boiler steam-pressure gauge is protected from high temperatures by ___.
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Study Guide
Questions
www.EngineeringBooksPdf.com
, boiler exam study guide 1
1.0.433: The pressure at the base of a vertical foot of water is ___ psi.
2.1 ½ times the safety valve setting: When performing a hydrostatic test, the pressure on the
boiler should be increased to ___.
3.1 ½ to 2 times the safety valve setting: A boiler steam pressure gauge should have a range of
___.
4.2 ½: The maximum size of the bottom blowdown line and the surface blowdown line is ___".
5.3: During startup, the boiler vent should remain open until a pressure of approximately ___ psi
is on the boiler.
6.6: No. ___ fuel oil must be heated to reach the required temperature for combustion.
7.6: No. ___ fuel oil must be heater in order to be pumped.
8.6: Fuel oil heaters must be used when burning No. ___ fuel oil.
9.8.3: Water weighs approximately ___ lb/gal.
10.15: In order to burn 1 lb of fuel, approximately ___ lb of air are needed.
11.15 psi: A low pressure steam boiler has a maximum allowable working pressure (MAWP) of up
to ___.
12.20,000 lb of water/hr: A boiler generating 20,000 lb of steam/hr must be supplied with at
least ___.
13.21; 79: Air needed for the combustion of fuel is made up of approximately ___% oxygen and
___% nitrogen.
14.75% to 85% of the line pressure: The automatic nonreturn valve on a boiler being cut in on a
line should be opened when the steam pressure on the boiler reaches ___.
15.a boiler explosion: A sudden drop in boiler steam pressure without a corresponding drop in
boiler water temperature could result in ___.
16.a continuous flow of steam: Superheater tubes are protected from warping or burning out by
___.
17.a firetube boiler: Because of the large volume of water, the boiler most likely to cause a boiler
explosion is ___.
18.a firetube boiler (high or low pressure): Stays and braces are needed to prevent bulging in ___.
19.a hydrostatic test: After a boiler has had major repair work made on its steam or water side or
has developed a low water condition, it should be subjected to ___.
20.a large pressure drop: An indication of a dirty fuel oil strainer would be ___ across the
strainer.
21.a loss of air for combustion and lower boiler efficiency: If air supplied for combustion mixes
with gases of combustion, it could lead to ___.
22.a nonadhering sludge: Chemicals added to the boiler water change the scale-forming salts into
___.
23.a possible furnace explosion: The purpose of a flame failure control is to protect the boiler
from ___.
24.a prepurge period: To eliminate the danger of a furnace explosion during startup, the firing
sequence must first allow for ___.
25.a secondary means of determining water level in a boiler.: Try cocks are ___.
26.a siphon: The boiler steam-pressure gauge is protected from high temperatures by ___.
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