boiler exam study guide 2 Questions And
Correct Answers (Verified Answers) 2026
removes sludge and sediment from the mud drum - CORRECT ANSWER-The bottom blowdown
on a boiler ___.
outside diameter - CORRECT ANSWER-Boiler tubes are sized using the ___.
tin - CORRECT ANSWER-A boiler fusible plug is brass or bronze with a core of ___.
hairline cracks in the refractory - CORRECT ANSWER-Spalling in a boiler refers to ___.
34.5 - CORRECT ANSWER-Boiler horsepower is the evaporation of ___ lb of water/hr from and
at a feedwater temperature of 212°F.
steam temperature - CORRECT ANSWER-A siphon installed between the boiler and the pressure
gauge protects the Bourdon tube from___.
10 to 11.5 - CORRECT ANSWER-The pH of the boiler water should be ___.
steam leaving the boiler - CORRECT ANSWER-The boiler superheater raises the temperature of
the ___.
feedwater - CORRECT ANSWER-An economizer is used to preheat ___.
,oily waste rags - CORRECT ANSWER-Fires caused by spontaneous combustion would probably
start in the ___.
dirty strainers - CORRECT ANSWER-A high suction reading on the fuel oil pressure gauge
indicates ___.
try cock - CORRECT ANSWER-The ___ is a secondary means of determining boiler water level.
pyrometer - CORRECT ANSWER-A(n) ___ is used to measure furnace temperature.
1 ½ - CORRECT ANSWER-The range of a boiler pressure gauge must not be less than ___ times
the safety valve setting.
prevent formation of scale - CORRECT ANSWER-Boiler feedwater is chemically treated to ___.
deadweight tester - CORRECT ANSWER-Pressure gauges are calibrated with a(n) ___.
inside tube surface - CORRECT ANSWER-In a firetube boiler, soot settles on the ___.
complete - CORRECT ANSWER-Carbon dioxide in the flue gas is a sign of ___ combustion.
incomplete - CORRECT ANSWER-Carbon monoxide in the flue gas is a sign of ___ combustion.
Globe - CORRECT ANSWER-___ valves should be used for throttling service.
a dirty heating surface - CORRECT ANSWER-A gradual increase in chimney temperature indicates
___.
, 1 ½ - CORRECT ANSWER-The pressure applied on the boiler during a hydrostatic test is ___
times the MAWP.
6 - CORRECT ANSWER-Boiler safety valve capacity must be such that the steam pressure can
never go higher than ___% above the MAWP.
decreased - CORRECT ANSWER-As fuel oil is heated, its viscosity is ___.
6 - CORRECT ANSWER-No. ___ fuel oil has the highest Btu content per gallon.
T - CORRECT ANSWER-T/F All steam boilers must have one or more safety valves.
T - CORRECT ANSWER-T/F An open feedwater heater vents gases to the atmosphere.
F - CORRECT ANSWER-T/F A hydrostatic test will determine whether a steam boiler has
sufficient relieving capacity.
T - 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 - CORRECT ANSWER-T/F Open and closed feedwater heaters are never used at the same time.
T - 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.
Correct Answers (Verified Answers) 2026
removes sludge and sediment from the mud drum - CORRECT ANSWER-The bottom blowdown
on a boiler ___.
outside diameter - CORRECT ANSWER-Boiler tubes are sized using the ___.
tin - CORRECT ANSWER-A boiler fusible plug is brass or bronze with a core of ___.
hairline cracks in the refractory - CORRECT ANSWER-Spalling in a boiler refers to ___.
34.5 - CORRECT ANSWER-Boiler horsepower is the evaporation of ___ lb of water/hr from and
at a feedwater temperature of 212°F.
steam temperature - CORRECT ANSWER-A siphon installed between the boiler and the pressure
gauge protects the Bourdon tube from___.
10 to 11.5 - CORRECT ANSWER-The pH of the boiler water should be ___.
steam leaving the boiler - CORRECT ANSWER-The boiler superheater raises the temperature of
the ___.
feedwater - CORRECT ANSWER-An economizer is used to preheat ___.
,oily waste rags - CORRECT ANSWER-Fires caused by spontaneous combustion would probably
start in the ___.
dirty strainers - CORRECT ANSWER-A high suction reading on the fuel oil pressure gauge
indicates ___.
try cock - CORRECT ANSWER-The ___ is a secondary means of determining boiler water level.
pyrometer - CORRECT ANSWER-A(n) ___ is used to measure furnace temperature.
1 ½ - CORRECT ANSWER-The range of a boiler pressure gauge must not be less than ___ times
the safety valve setting.
prevent formation of scale - CORRECT ANSWER-Boiler feedwater is chemically treated to ___.
deadweight tester - CORRECT ANSWER-Pressure gauges are calibrated with a(n) ___.
inside tube surface - CORRECT ANSWER-In a firetube boiler, soot settles on the ___.
complete - CORRECT ANSWER-Carbon dioxide in the flue gas is a sign of ___ combustion.
incomplete - CORRECT ANSWER-Carbon monoxide in the flue gas is a sign of ___ combustion.
Globe - CORRECT ANSWER-___ valves should be used for throttling service.
a dirty heating surface - CORRECT ANSWER-A gradual increase in chimney temperature indicates
___.
, 1 ½ - CORRECT ANSWER-The pressure applied on the boiler during a hydrostatic test is ___
times the MAWP.
6 - CORRECT ANSWER-Boiler safety valve capacity must be such that the steam pressure can
never go higher than ___% above the MAWP.
decreased - CORRECT ANSWER-As fuel oil is heated, its viscosity is ___.
6 - CORRECT ANSWER-No. ___ fuel oil has the highest Btu content per gallon.
T - CORRECT ANSWER-T/F All steam boilers must have one or more safety valves.
T - CORRECT ANSWER-T/F An open feedwater heater vents gases to the atmosphere.
F - CORRECT ANSWER-T/F A hydrostatic test will determine whether a steam boiler has
sufficient relieving capacity.
T - 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 - CORRECT ANSWER-T/F Open and closed feedwater heaters are never used at the same time.
T - 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.
