Boiler Operator Licensing Exam Questions and Answers
1 or more safety valves - ANSWER -all
steam boilers must have
Oily waste rag storage - ANSWER -fires
caused by spontaneous combustion are most
Locked closed - ANSWER -before anyone likely to occur in the
enters the boiler drum, the main steam stop
valve, bottom blowdown valves, & feedwater
valves should be Steam - ANSWER -a siphon installed
between the boiler & the pressure gauge protects
the Bourdon tube from
212 degrees F - ANSWER -at atmospheric
pressure, water begins to boil at approximately
Prevent formation of scale - ANSWER -
boiler feedwater is chemically treated to
Fuel oil, gas, & coal - ANSWER -fuels most
commonly used in boilers
Inside tube surface - ANSWER -in a
firetube boiler, soot accumulates on the
Steam pressure gauge - ANSWER -must
be connected to the highest part of the steam
side of the boiler 1.5 times the MAWP - ANSWER -the
pressure applied on the boiler during a
hydrostatic test should be
Half full - ANSWER -with an NOWL in a
boiler, the gauge glass is approximately
Decreased - ANSWER -as fuel oil is
heated, its viscosity is
Foaming - ANSWER -a high surface
tension on top of the boiler water can lead to
Chimney - ANSWER -the induced draft fan
is located between the boiler & the
Mud drum - ANSWER -Bottom blowdown
on a boiler removes sludge & sediment from the
Flash when exposed to an open flame -
ANSWER -the flash point of fuel oil is the
Tin - ANSWER -a boiler fusible plug is minimum temperature at which the fuel will
brass or bronze with a core of
Burn continually - ANSWER -the fire point
Pounds per square inch - ANSWER -a of fuel oil is the minimum temperature at which
steam pressure gauge is calibrated in the fuel will
Try cocks - ANSWER -a secondary means Lowest; flow - ANSWER -the pour point of
of determining boiler water level fuel oil is the ____ temperature at which fuel oil
1/7
, Boiler Operator Licensing Exam Questions and Answers
will ____ prevented by
Dangerous to handle - ANSWER -fuel oil Infrared light - ANSWER -a lead sulfide cell
with a low flash point is which is used for flame detection is sensitive to
Pressure control - ANSWER -the operating Spring loaded - ANSWER -a pop safety
range of a steam boiler is controlled by a valve is
Condensate in the line - ANSWER -water Secure feedwater going to the boiler -
hammer in steam lines is caused by ANSWER -to test a low water fuel cutoff
using an evaporation test, the boiler operator
must
Manometer - ANSWER -measures the
difference in pressure between 2 points,
measures draft NFPA - ANSWER -hazard signal system
provides container label information about
hazardous material
Lowest load - ANSWER -the best time to
blowdown a boiler is when it is at its
Open the boiler vent - ANSWER -to prevent
vacuum from forming on a boiler that is coming
Silica gel - ANSWER -Boilers that are laid offline
up dry have trays of ____ put in the steam &
water drums to absorb moisture
Quick opening; last - ANSWER -low
pressure boilers equipped with quick opening &
Mixture; atomization; temperature; time - screw valves are blown down by opening the
ANSWER -required to obtain complete ____ valve first & closing it ____
combustion of a fuel
Internal resistance to flow - ANSWER -the
Pitting - ANSWER -oxygen in the boiler viscosity of fuel oil is the measurement of the
causes
Change scale forming salts to a nonadhering
Secure the fires & feedwater - ANSWER - sludge - ANSWER -feedwater is treated
when the boiler low water alarm is ringing, the chemically before it enters the boiler to
operator should
Minimal amount of excess air - ANSWER -
Purging the furnace after ignition failure - complete combustion is defined as burning all
ANSWER -a furnace explosion can be fuel using
2/7
1 or more safety valves - ANSWER -all
steam boilers must have
Oily waste rag storage - ANSWER -fires
caused by spontaneous combustion are most
Locked closed - ANSWER -before anyone likely to occur in the
enters the boiler drum, the main steam stop
valve, bottom blowdown valves, & feedwater
valves should be Steam - ANSWER -a siphon installed
between the boiler & the pressure gauge protects
the Bourdon tube from
212 degrees F - ANSWER -at atmospheric
pressure, water begins to boil at approximately
Prevent formation of scale - ANSWER -
boiler feedwater is chemically treated to
Fuel oil, gas, & coal - ANSWER -fuels most
commonly used in boilers
Inside tube surface - ANSWER -in a
firetube boiler, soot accumulates on the
Steam pressure gauge - ANSWER -must
be connected to the highest part of the steam
side of the boiler 1.5 times the MAWP - ANSWER -the
pressure applied on the boiler during a
hydrostatic test should be
Half full - ANSWER -with an NOWL in a
boiler, the gauge glass is approximately
Decreased - ANSWER -as fuel oil is
heated, its viscosity is
Foaming - ANSWER -a high surface
tension on top of the boiler water can lead to
Chimney - ANSWER -the induced draft fan
is located between the boiler & the
Mud drum - ANSWER -Bottom blowdown
on a boiler removes sludge & sediment from the
Flash when exposed to an open flame -
ANSWER -the flash point of fuel oil is the
Tin - ANSWER -a boiler fusible plug is minimum temperature at which the fuel will
brass or bronze with a core of
Burn continually - ANSWER -the fire point
Pounds per square inch - ANSWER -a of fuel oil is the minimum temperature at which
steam pressure gauge is calibrated in the fuel will
Try cocks - ANSWER -a secondary means Lowest; flow - ANSWER -the pour point of
of determining boiler water level fuel oil is the ____ temperature at which fuel oil
1/7
, Boiler Operator Licensing Exam Questions and Answers
will ____ prevented by
Dangerous to handle - ANSWER -fuel oil Infrared light - ANSWER -a lead sulfide cell
with a low flash point is which is used for flame detection is sensitive to
Pressure control - ANSWER -the operating Spring loaded - ANSWER -a pop safety
range of a steam boiler is controlled by a valve is
Condensate in the line - ANSWER -water Secure feedwater going to the boiler -
hammer in steam lines is caused by ANSWER -to test a low water fuel cutoff
using an evaporation test, the boiler operator
must
Manometer - ANSWER -measures the
difference in pressure between 2 points,
measures draft NFPA - ANSWER -hazard signal system
provides container label information about
hazardous material
Lowest load - ANSWER -the best time to
blowdown a boiler is when it is at its
Open the boiler vent - ANSWER -to prevent
vacuum from forming on a boiler that is coming
Silica gel - ANSWER -Boilers that are laid offline
up dry have trays of ____ put in the steam &
water drums to absorb moisture
Quick opening; last - ANSWER -low
pressure boilers equipped with quick opening &
Mixture; atomization; temperature; time - screw valves are blown down by opening the
ANSWER -required to obtain complete ____ valve first & closing it ____
combustion of a fuel
Internal resistance to flow - ANSWER -the
Pitting - ANSWER -oxygen in the boiler viscosity of fuel oil is the measurement of the
causes
Change scale forming salts to a nonadhering
Secure the fires & feedwater - ANSWER - sludge - ANSWER -feedwater is treated
when the boiler low water alarm is ringing, the chemically before it enters the boiler to
operator should
Minimal amount of excess air - ANSWER -
Purging the furnace after ignition failure - complete combustion is defined as burning all
ANSWER -a furnace explosion can be fuel using
2/7
