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Boiler Exam Study Guide 2 – Questions / Answers
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Boiler Exam Study Guide 2 – Questions / AnswersRemoves 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.
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