BOILER COMPLETE LATEST ACTUAL
EXAM STUDY GUIDE WITH QUESTIONS
AND CORRECT/VERIFIED ANSWERS
removes sludge and sediment from the mud drum - ANS-✅The bottom blowdown on a boiler ___.
outside diameter - ANS-✅Boiler tubes are sized using the ___.
tin - ANS-✅A boiler fusible plug is brass or bronze with a core of ___.
hairline cracks in the refractory - ANS-✅Spalling in a boiler refers to ___.
34.5 - ANS-✅Boiler horsepower is the evaporation of ___ lb of water/hr from and at a feedwater
temperature of 212°F.
steam temperature - ANS-✅A siphon installed between the boiler and the pressure gauge protects the
Bourdon tube from___.
10 to 11.5 - ANS-✅The pH of the boiler water should be ___.
steam leaving the boiler - ANS-✅The boiler superheater raises the temperature of the ___.
feedwater - ANS-✅An economizer is used to preheat ___.
oily waste rags - ANS-✅Fires caused by spontaneous combustion would probably start in the ___.
dirty strainers - ANS-✅A high suction reading on the fuel oil pressure gauge indicates ___.
try cock - ANS-✅The ___ is a secondary means of determining boiler water level.
pyrometer - ANS-✅A(n) ___ is used to measure furnace temperature.
1 ½ - ANS-✅The range of a boiler pressure gauge must not be less than ___ times the safety valve
setting.
prevent formation of scale - ANS-✅Boiler feedwater is chemically treated to ___.
deadweight tester - ANS-✅Pressure gauges are calibrated with a(n) ___.
inside tube surface - ANS-✅In a firetube boiler, soot settles on the ___.
complete - ANS-✅Carbon dioxide in the flue gas is a sign of ___ combustion.
incomplete - ANS-✅Carbon monoxide in the flue gas is a sign of ___ combustion.
Globe - ANS-✅___ valves should be used for throttling service.
a dirty heating surface - ANS-✅A gradual increase in chimney temperature indicates ___.
1 ½ - ANS-✅The pressure applied on the boiler during a hydrostatic test is ___ times the MAWP.
6 - ANS-✅Boiler safety valve capacity must be such that the steam pressure can never go higher than
___% above the MAWP.
decreased - ANS-✅As fuel oil is heated, its viscosity is ___.
6 - ANS-✅No. ___ fuel oil has the highest Btu content per gallon.
T - ANS-✅T/F All steam boilers must have one or more safety valves.
T - ANS-✅T/F An open feedwater heater vents gases to the atmosphere.
F - ANS-✅T/F A hydrostatic test will determine whether a steam boiler has sufficient relieving capacity.
T - ANS-✅T/F When boilers are set in battery, the main steam stop valves, bottom blowdown valves,
and feedwater valves should be locked closed before anyone enters the boiler drums.
F - ANS-✅T/F Open and closed feedwater heaters are never used at the same time.
T - ANS-✅T/F In an open feedwater heater, the water and steam come into direct contact; in a closed
feedwater heater, the water and steam are separated.
T - ANS-✅T/F An economizer is a fuel-saving device that reclaims heat from the gases of combustion.
F - ANS-✅T/F Soot accumulation on the tubes of a watertube boiler does not affect the efficiency of the
boiler.
F - ANS-✅T/F Scale protects the boiler heating surfaces.
F - ANS-✅T/F Boiler corrosion cannot be prevented as long as water is in contact with metal.
, T - ANS-✅T/F To prevent water hammer, water should be drained out of all high pressure steam lines
T - ANS-✅T/F Dry saturated steam is in a gaseous state.
F - ANS-✅T/F Pressure on water does not change the boiling point of the water.
F - ANS-✅T/F The stop valve in a boiler feedwater line should have the pump discharge pressure on the
top of the valve disc when the valve is closed.
T - ANS-✅T/F According to the ASME Code, weighted lever safety valves cannot be used on boilers.
F - ANS-✅T/F The interior of the Bourdon tube in a steam pressure gauge is always filled with live steam
when it is operating.
T - ANS-✅T/F Safety valves on superheaters should be set to open before main safety valves on boilers.
T - ANS-✅T/F When air preheaters or economizers are used in a boiler, induced draft is usually
employed.
T - ANS-✅T/F Waterwalls permit greater heat absorption per cubic foot of furnace volume than
refractory walls.
T - ANS-✅T/F A steam trap is a device that removes air and condensate without loss of steam.
F - ANS-✅T/F Steam traps are only used on high-temperature hot water systems.
T - ANS-✅T/F Steam traps are used wherever condensate collects.
F - ANS-✅T/F A boiler feedwater pump cannot become steambound.
F - ANS-✅T/F In both firetube and watertube boilers, the fire is inside the tubes.
T - ANS-✅T/F Foaming can lead to carryover.
Steam entering the huddling chamber exposing a larger area for the steam pressure to act on - ANS-
✅___ makes a pop-type safety valve pop open.
pulling the test lever by hand and then releasing it to allow it to "snap" closed - ANS-✅Manual testing
of the safety valve is accomplished by ___.
a mixture of water and steam - ANS-✅The middle try cock should be mounted at the NOWL and, when
operated, should blow ___.
soot blowers - ANS-✅To ensure good heat transfer in a watertube boiler, the outside of the tubes are
kept clean by ___.
recommended feedwater treatment - ANS-✅To ensure good heat transfer in a firetube boiler, the
outside of the tubes are kept clean by ___.
1 - ANS-✅When economizers are used to heat boiler feedwater, every 10°F rise in feedwater
temperature is accompanied by a ___% savings in fuel.
the boiler's main steam stop valves, feedwater lines, and bottom blowdown lines be closed, locked, and
tagged out - ANS-✅Proper safety procedure requires that ___ before anyone is allowed to enter the
steam and water drum.
boiler setting is cool enough to enter the firebox - ANS-✅Boilers taken off-line for cleaning and
inspection may be dumped (emptied) when the ___.
Overfire air - ANS-✅___ is necessary to burn the volatile matter in coal more efficiently.
boiler; chimney - ANS-✅The induced draft fan is located between the ___ and ___.
flash when exposed to an open flame - ANS-✅The flash point of fuel oil is the minimum temperature at
which the fuel oil will ___.
burn continually - ANS-✅The fire point of fuel oil is the minimum temperature at which the fuel oil will
___.
lowest; flow - ANS-✅The pour point of fuel oil is the ___ temperature at which fuel oil will ___.
dangerous to handle - ANS-✅Fuel oil with a low flash point is ___.
Sulfur - ANS-✅___ dioxide is a major cause of air pollution and is caused by burning fuel oil.
do not mix - ANS-✅In a closed feedwater heater, the steam and water ___.
operating pressure control - ANS-✅The operating range of a steam boiler is controlled by a(n) ___.
condensation in the line - ANS-✅Water hammer in steam lines is caused by ___.
EXAM STUDY GUIDE WITH QUESTIONS
AND CORRECT/VERIFIED ANSWERS
removes sludge and sediment from the mud drum - ANS-✅The bottom blowdown on a boiler ___.
outside diameter - ANS-✅Boiler tubes are sized using the ___.
tin - ANS-✅A boiler fusible plug is brass or bronze with a core of ___.
hairline cracks in the refractory - ANS-✅Spalling in a boiler refers to ___.
34.5 - ANS-✅Boiler horsepower is the evaporation of ___ lb of water/hr from and at a feedwater
temperature of 212°F.
steam temperature - ANS-✅A siphon installed between the boiler and the pressure gauge protects the
Bourdon tube from___.
10 to 11.5 - ANS-✅The pH of the boiler water should be ___.
steam leaving the boiler - ANS-✅The boiler superheater raises the temperature of the ___.
feedwater - ANS-✅An economizer is used to preheat ___.
oily waste rags - ANS-✅Fires caused by spontaneous combustion would probably start in the ___.
dirty strainers - ANS-✅A high suction reading on the fuel oil pressure gauge indicates ___.
try cock - ANS-✅The ___ is a secondary means of determining boiler water level.
pyrometer - ANS-✅A(n) ___ is used to measure furnace temperature.
1 ½ - ANS-✅The range of a boiler pressure gauge must not be less than ___ times the safety valve
setting.
prevent formation of scale - ANS-✅Boiler feedwater is chemically treated to ___.
deadweight tester - ANS-✅Pressure gauges are calibrated with a(n) ___.
inside tube surface - ANS-✅In a firetube boiler, soot settles on the ___.
complete - ANS-✅Carbon dioxide in the flue gas is a sign of ___ combustion.
incomplete - ANS-✅Carbon monoxide in the flue gas is a sign of ___ combustion.
Globe - ANS-✅___ valves should be used for throttling service.
a dirty heating surface - ANS-✅A gradual increase in chimney temperature indicates ___.
1 ½ - ANS-✅The pressure applied on the boiler during a hydrostatic test is ___ times the MAWP.
6 - ANS-✅Boiler safety valve capacity must be such that the steam pressure can never go higher than
___% above the MAWP.
decreased - ANS-✅As fuel oil is heated, its viscosity is ___.
6 - ANS-✅No. ___ fuel oil has the highest Btu content per gallon.
T - ANS-✅T/F All steam boilers must have one or more safety valves.
T - ANS-✅T/F An open feedwater heater vents gases to the atmosphere.
F - ANS-✅T/F A hydrostatic test will determine whether a steam boiler has sufficient relieving capacity.
T - ANS-✅T/F When boilers are set in battery, the main steam stop valves, bottom blowdown valves,
and feedwater valves should be locked closed before anyone enters the boiler drums.
F - ANS-✅T/F Open and closed feedwater heaters are never used at the same time.
T - ANS-✅T/F In an open feedwater heater, the water and steam come into direct contact; in a closed
feedwater heater, the water and steam are separated.
T - ANS-✅T/F An economizer is a fuel-saving device that reclaims heat from the gases of combustion.
F - ANS-✅T/F Soot accumulation on the tubes of a watertube boiler does not affect the efficiency of the
boiler.
F - ANS-✅T/F Scale protects the boiler heating surfaces.
F - ANS-✅T/F Boiler corrosion cannot be prevented as long as water is in contact with metal.
, T - ANS-✅T/F To prevent water hammer, water should be drained out of all high pressure steam lines
T - ANS-✅T/F Dry saturated steam is in a gaseous state.
F - ANS-✅T/F Pressure on water does not change the boiling point of the water.
F - ANS-✅T/F The stop valve in a boiler feedwater line should have the pump discharge pressure on the
top of the valve disc when the valve is closed.
T - ANS-✅T/F According to the ASME Code, weighted lever safety valves cannot be used on boilers.
F - ANS-✅T/F The interior of the Bourdon tube in a steam pressure gauge is always filled with live steam
when it is operating.
T - ANS-✅T/F Safety valves on superheaters should be set to open before main safety valves on boilers.
T - ANS-✅T/F When air preheaters or economizers are used in a boiler, induced draft is usually
employed.
T - ANS-✅T/F Waterwalls permit greater heat absorption per cubic foot of furnace volume than
refractory walls.
T - ANS-✅T/F A steam trap is a device that removes air and condensate without loss of steam.
F - ANS-✅T/F Steam traps are only used on high-temperature hot water systems.
T - ANS-✅T/F Steam traps are used wherever condensate collects.
F - ANS-✅T/F A boiler feedwater pump cannot become steambound.
F - ANS-✅T/F In both firetube and watertube boilers, the fire is inside the tubes.
T - ANS-✅T/F Foaming can lead to carryover.
Steam entering the huddling chamber exposing a larger area for the steam pressure to act on - ANS-
✅___ makes a pop-type safety valve pop open.
pulling the test lever by hand and then releasing it to allow it to "snap" closed - ANS-✅Manual testing
of the safety valve is accomplished by ___.
a mixture of water and steam - ANS-✅The middle try cock should be mounted at the NOWL and, when
operated, should blow ___.
soot blowers - ANS-✅To ensure good heat transfer in a watertube boiler, the outside of the tubes are
kept clean by ___.
recommended feedwater treatment - ANS-✅To ensure good heat transfer in a firetube boiler, the
outside of the tubes are kept clean by ___.
1 - ANS-✅When economizers are used to heat boiler feedwater, every 10°F rise in feedwater
temperature is accompanied by a ___% savings in fuel.
the boiler's main steam stop valves, feedwater lines, and bottom blowdown lines be closed, locked, and
tagged out - ANS-✅Proper safety procedure requires that ___ before anyone is allowed to enter the
steam and water drum.
boiler setting is cool enough to enter the firebox - ANS-✅Boilers taken off-line for cleaning and
inspection may be dumped (emptied) when the ___.
Overfire air - ANS-✅___ is necessary to burn the volatile matter in coal more efficiently.
boiler; chimney - ANS-✅The induced draft fan is located between the ___ and ___.
flash when exposed to an open flame - ANS-✅The flash point of fuel oil is the minimum temperature at
which the fuel oil will ___.
burn continually - ANS-✅The fire point of fuel oil is the minimum temperature at which the fuel oil will
___.
lowest; flow - ANS-✅The pour point of fuel oil is the ___ temperature at which fuel oil will ___.
dangerous to handle - ANS-✅Fuel oil with a low flash point is ___.
Sulfur - ANS-✅___ dioxide is a major cause of air pollution and is caused by burning fuel oil.
do not mix - ANS-✅In a closed feedwater heater, the steam and water ___.
operating pressure control - ANS-✅The operating range of a steam boiler is controlled by a(n) ___.
condensation in the line - ANS-✅Water hammer in steam lines is caused by ___.
