2026 BOILER CERTIFICATION VAULT
– A+ PRACTICE TESTS FOR LOW- &
HIGH-PRESSURE SYSTEMS
deadweight tester - THE CORRECT ANSWER-Pressure gauges are
calibrated with a(n) ___.
inside tube surface - THE CORRECT ANSWER-In a firetube boiler, soot
settles on the ___.
complete - THE CORRECT ANSWER-Carbon dioxide in the flue gas is a
sign of ___ combustion.
incomplete - THE CORRECT ANSWER-Carbon monoxide in the flue gas
is a sign of ___ combustion.
Globe - THE CORRECT ANSWER-___ valves should be used for
throttling service.
a dirty heating surface - THE CORRECT ANSWER-A gradual increase in
chimney temperature indicates ___.
1 ½ - THE CORRECT ANSWER-The pressure applied on the boiler
during a hydrostatic test is ___ times the MAWP.
,6 - THE CORRECT ANSWER-Boiler safety valve capacity must be such
that the steam pressure can never go higher than ___% above
the MAWP.
decreased - THE CORRECT ANSWER-As fuel oil is heated, its viscosity
is ___.
6 - THE CORRECT ANSWER-No. ___ fuel oil has the highest Btu
content per gallon.
T - THE CORRECT ANSWER-T/F All steam boilers must have one or
more safety valves.
T - THE CORRECT ANSWER-T/F An open feedwater heater vents gases
to the atmosphere.
F - THE CORRECT ANSWER-T/F A hydrostatic test will determine
whether a steam boiler has sufficient relieving capacity.
T - THE CORRECT ANSWER-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 - THE CORRECT ANSWER-T/F Open and closed feedwater heaters
are never used at the same time.
,T - THE CORRECT ANSWER-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 - THE CORRECT ANSWER-T/F An economizer is a fuel-saving device
that reclaims heat from the gases of combustion.
F - THE CORRECT ANSWER-T/F Soot accumulation on the tubes of a
watertube boiler does not affect the efficiency of the boiler.
F - THE CORRECT ANSWER-T/F Scale protects the boiler heating
surfaces.
F - THE CORRECT ANSWER-T/F Boiler corrosion cannot be prevented
as long as water is in contact with metal.
T - THE CORRECT ANSWER-T/F To prevent water hammer, water
should be drained out of all high pressure steam lines
T - THE CORRECT ANSWER-T/F Dry saturated steam is in a gaseous
state.
F - THE CORRECT ANSWER-T/F Pressure on water does not change
the boiling point of the water.
F - THE CORRECT ANSWER-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 - THE CORRECT ANSWER-T/F According to the ASME Code,
weighted lever safety valves cannot be used on boilers.
F - THE CORRECT ANSWER-T/F The interior of the Bourdon tube in a
steam pressure gauge is always filled with live steam when it is
operating.
T - THE CORRECT ANSWER-T/F Safety valves on superheaters should
be set to open before main safety valves on boilers.
T - THE CORRECT ANSWER-T/F When air preheaters or economizers
are used in a boiler, induced draft is usually employed.
T - THE CORRECT ANSWER-T/F Waterwalls permit greater heat
absorption per cubic foot of furnace volume than refractory
walls.
T - THE CORRECT ANSWER-T/F A steam trap is a device that removes
air and condensate without loss of steam.
F - THE CORRECT ANSWER-T/F Steam traps are only used on high-
temperature hot water systems.
T - THE CORRECT ANSWER-T/F Steam traps are used wherever
condensate collects.
– A+ PRACTICE TESTS FOR LOW- &
HIGH-PRESSURE SYSTEMS
deadweight tester - THE CORRECT ANSWER-Pressure gauges are
calibrated with a(n) ___.
inside tube surface - THE CORRECT ANSWER-In a firetube boiler, soot
settles on the ___.
complete - THE CORRECT ANSWER-Carbon dioxide in the flue gas is a
sign of ___ combustion.
incomplete - THE CORRECT ANSWER-Carbon monoxide in the flue gas
is a sign of ___ combustion.
Globe - THE CORRECT ANSWER-___ valves should be used for
throttling service.
a dirty heating surface - THE CORRECT ANSWER-A gradual increase in
chimney temperature indicates ___.
1 ½ - THE CORRECT ANSWER-The pressure applied on the boiler
during a hydrostatic test is ___ times the MAWP.
,6 - THE CORRECT ANSWER-Boiler safety valve capacity must be such
that the steam pressure can never go higher than ___% above
the MAWP.
decreased - THE CORRECT ANSWER-As fuel oil is heated, its viscosity
is ___.
6 - THE CORRECT ANSWER-No. ___ fuel oil has the highest Btu
content per gallon.
T - THE CORRECT ANSWER-T/F All steam boilers must have one or
more safety valves.
T - THE CORRECT ANSWER-T/F An open feedwater heater vents gases
to the atmosphere.
F - THE CORRECT ANSWER-T/F A hydrostatic test will determine
whether a steam boiler has sufficient relieving capacity.
T - THE CORRECT ANSWER-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 - THE CORRECT ANSWER-T/F Open and closed feedwater heaters
are never used at the same time.
,T - THE CORRECT ANSWER-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 - THE CORRECT ANSWER-T/F An economizer is a fuel-saving device
that reclaims heat from the gases of combustion.
F - THE CORRECT ANSWER-T/F Soot accumulation on the tubes of a
watertube boiler does not affect the efficiency of the boiler.
F - THE CORRECT ANSWER-T/F Scale protects the boiler heating
surfaces.
F - THE CORRECT ANSWER-T/F Boiler corrosion cannot be prevented
as long as water is in contact with metal.
T - THE CORRECT ANSWER-T/F To prevent water hammer, water
should be drained out of all high pressure steam lines
T - THE CORRECT ANSWER-T/F Dry saturated steam is in a gaseous
state.
F - THE CORRECT ANSWER-T/F Pressure on water does not change
the boiling point of the water.
F - THE CORRECT ANSWER-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 - THE CORRECT ANSWER-T/F According to the ASME Code,
weighted lever safety valves cannot be used on boilers.
F - THE CORRECT ANSWER-T/F The interior of the Bourdon tube in a
steam pressure gauge is always filled with live steam when it is
operating.
T - THE CORRECT ANSWER-T/F Safety valves on superheaters should
be set to open before main safety valves on boilers.
T - THE CORRECT ANSWER-T/F When air preheaters or economizers
are used in a boiler, induced draft is usually employed.
T - THE CORRECT ANSWER-T/F Waterwalls permit greater heat
absorption per cubic foot of furnace volume than refractory
walls.
T - THE CORRECT ANSWER-T/F A steam trap is a device that removes
air and condensate without loss of steam.
F - THE CORRECT ANSWER-T/F Steam traps are only used on high-
temperature hot water systems.
T - THE CORRECT ANSWER-T/F Steam traps are used wherever
condensate collects.
