BOILER OPERATOR LICENSING EXAM
QUESTIONS & ANSWERS 100%
CORRECT!!
1 or more safety valves - ANSWERall steam boilers must have
Locked closed - ANSWERbefore anyone enters the boiler drum, the main steam
stop valve, bottom blowdown valves, & feedwater valves should be
212 degrees F - ANSWERat atmospheric pressure, water begins to boil at
approximately
Fuel oil, gas, & coal - ANSWERfuels most commonly used in boilers
Steam pressure gauge - ANSWERmust be connected to the highest part of the
steam side of the boiler
Half full - ANSWERwith an NOWL in a boiler, the gauge glass is approximately
Foaming - ANSWERa high surface tension on top of the boiler water can lead to
Mud drum - ANSWERBottom blowdown on a boiler removes sludge & sediment from
the
Tin - ANSWERa boiler fusible plug is brass or bronze with a core of
Pounds per square inch - ANSWERa steam pressure gauge is calibrated in
Try cocks - ANSWERa secondary means of determining boiler water level
Oily waste rag storage - ANSWERfires caused by spontaneous combustion are most
likely to occur in the
Steam - ANSWERa siphon installed between the boiler & the pressure gauge
protects the Bourdon tube from
Prevent formation of scale - ANSWERboiler feedwater is chemically treated to
Inside tube surface - ANSWERin a firetube boiler, soot accumulates on the
1.5 times the MAWP - ANSWERthe pressure applied on the boiler during a
hydrostatic test should be
Decreased - ANSWERas fuel oil is heated, its viscosity is
Chimney - ANSWERthe induced draft fan is located between the boiler & the
, Flash when exposed to an open flame - ANSWERthe flash point of fuel oil is the
minimum temperature at which the fuel will
Burn continually - ANSWERthe fire point of fuel oil is the minimum temperature at
which the fuel will
Lowest; flow - ANSWERthe pour point of fuel oil is the ____ temperature at which
fuel oil will ____
Dangerous to handle - ANSWERfuel oil with a low flash point is
Pressure control - ANSWERthe operating range of a steam boiler is controlled by a
Condensate in the line - ANSWERwater hammer in steam lines is caused by
Manometer - ANSWERmeasures the difference in pressure between 2 points,
measures draft
Lowest load - ANSWERthe best time to blowdown a boiler is when it is at its
Silica gel - ANSWERBoilers that are laid up dry have trays of ____ put in the steam
& water drums to absorb moisture
Mixture; atomization; temperature; time - ANSWERrequired to obtain complete
combustion of a fuel
Firetube boiler - ANSWERa scotch marine boiler is a
All safety valves are removed or gagged, the boiler vent is closed, the main steam
stop valve is closed - ANSWERwhen performing a hydrostatic test on a boiler
Draft - ANSWERthe difference in pressure between 2 points of measurement that
causes air or gases to flow
#6 fuel oil - ANSWERhas high viscosity compared to #2 fuel oil
Conduction - ANSWERheat transfer that occurs when molecules in a material are
heated & the heat is passed from molecule to molecule through the material
Pitting - ANSWERoxygen in the boiler causes
Secure the fires & feedwater - ANSWERwhen the boiler low water alarm is ringing,
the operator should
Purging the furnace after ignition failure - ANSWERa furnace explosion can be
prevented by
QUESTIONS & ANSWERS 100%
CORRECT!!
1 or more safety valves - ANSWERall steam boilers must have
Locked closed - ANSWERbefore anyone enters the boiler drum, the main steam
stop valve, bottom blowdown valves, & feedwater valves should be
212 degrees F - ANSWERat atmospheric pressure, water begins to boil at
approximately
Fuel oil, gas, & coal - ANSWERfuels most commonly used in boilers
Steam pressure gauge - ANSWERmust be connected to the highest part of the
steam side of the boiler
Half full - ANSWERwith an NOWL in a boiler, the gauge glass is approximately
Foaming - ANSWERa high surface tension on top of the boiler water can lead to
Mud drum - ANSWERBottom blowdown on a boiler removes sludge & sediment from
the
Tin - ANSWERa boiler fusible plug is brass or bronze with a core of
Pounds per square inch - ANSWERa steam pressure gauge is calibrated in
Try cocks - ANSWERa secondary means of determining boiler water level
Oily waste rag storage - ANSWERfires caused by spontaneous combustion are most
likely to occur in the
Steam - ANSWERa siphon installed between the boiler & the pressure gauge
protects the Bourdon tube from
Prevent formation of scale - ANSWERboiler feedwater is chemically treated to
Inside tube surface - ANSWERin a firetube boiler, soot accumulates on the
1.5 times the MAWP - ANSWERthe pressure applied on the boiler during a
hydrostatic test should be
Decreased - ANSWERas fuel oil is heated, its viscosity is
Chimney - ANSWERthe induced draft fan is located between the boiler & the
, Flash when exposed to an open flame - ANSWERthe flash point of fuel oil is the
minimum temperature at which the fuel will
Burn continually - ANSWERthe fire point of fuel oil is the minimum temperature at
which the fuel will
Lowest; flow - ANSWERthe pour point of fuel oil is the ____ temperature at which
fuel oil will ____
Dangerous to handle - ANSWERfuel oil with a low flash point is
Pressure control - ANSWERthe operating range of a steam boiler is controlled by a
Condensate in the line - ANSWERwater hammer in steam lines is caused by
Manometer - ANSWERmeasures the difference in pressure between 2 points,
measures draft
Lowest load - ANSWERthe best time to blowdown a boiler is when it is at its
Silica gel - ANSWERBoilers that are laid up dry have trays of ____ put in the steam
& water drums to absorb moisture
Mixture; atomization; temperature; time - ANSWERrequired to obtain complete
combustion of a fuel
Firetube boiler - ANSWERa scotch marine boiler is a
All safety valves are removed or gagged, the boiler vent is closed, the main steam
stop valve is closed - ANSWERwhen performing a hydrostatic test on a boiler
Draft - ANSWERthe difference in pressure between 2 points of measurement that
causes air or gases to flow
#6 fuel oil - ANSWERhas high viscosity compared to #2 fuel oil
Conduction - ANSWERheat transfer that occurs when molecules in a material are
heated & the heat is passed from molecule to molecule through the material
Pitting - ANSWERoxygen in the boiler causes
Secure the fires & feedwater - ANSWERwhen the boiler low water alarm is ringing,
the operator should
Purging the furnace after ignition failure - ANSWERa furnace explosion can be
prevented by
