MN BOILERS LICENSE PREP TEST
QUESTIONS & ANSWERS(GRADED A+)
Special (License Grade) - ANSWERWork in any type of plant
Grade C (License Grade) - ANSWERCan operate low-pressure steam or hot water
(no steam engines/turbines)
67,000 BTU/hr (for licensing) - ANSWER__________ BTU/hr = 1 horsepower
In the boiler room - ANSWERWhere should a boiler license be displayed?
One BTU - ANSWERWhat will raise one pound of water by one degree F
Check water level - ANSWERWhen entering a steam boiler room what is the first
thing an operator should do?
Above 15 psi, above 160 psi water, and temps above 250°F - ANSWERA high
pressure boiler is classified as such when what - ?
Grade B (License Grade) - ANSWERCan operate high-pressure or low-pressure
steam or hot water (no steam engines/turbines)
Grade A (License Grade) - ANSWERCan operate any plant including plants with
steam engines/turbines
Special (License Class) - ANSWERTake Charge (max 50 hpr)
Shift Engineer (max 100 hpr)
2nd Class (License Class) - ANSWERTake Charge (max 100 hpr)
Shift Engineer (max 500 hpr)
1st Class (License Class) - ANSWERTake Charge (max 500 hpr)
Shift Engineer (unlimited hpr)
Chief (License Class) - ANSWERTake Charge (unlimited hpr)
Shift engineer (unlimited hpr)
Shift Engineer - ANSWERCan operate and take responsibility for the plant while on
duty
Take Charge - ANSWERYou are the main person in charge of the plant. You
supervise shift engineers.
1 boiler horsepower = - ANSWER= 10 sq. Ft of heating surface
8.3 - ANSWER1 gallon of water weighs _____ pounds
, 10 kilowatts (for licensing) - ANSWER_____ kilowatts = 1 horsepower
A.S.M.E. Approved - ANSWERWhat type of safety valve is required?
Efficiency - ANSWERWhen operating a boiler, what is most important?
Shuts off fuel in case of low water - ANSWERHow does a low water fuel cut off
(LWCO) protect a boiler?
shut off the burner when a low water condition exists. - ANSWERIf you cannot
determine water level what do you do?
No - ANSWERCan you compress a liquid?
Cast Iron Sectional and Firebox - ANSWERWhat boilers are low pressure only?
Push nipples and Tie Rods - ANSWERWhat holds cast iron sections together?
At least as big as the largest incoming wire - ANSWEROn electric boilers, how large
should the ground wire be?
Baffle - ANSWERDirects flow of combustion gasses, water, and/or steam
Passes - ANSWERAmount of times the heat moves through the tubes in a fire tube
boiler
Refractory - ANSWERHard surface insulation (brick, concrete,...)
Stays - ANSWERHelps keep shape and position of boiler
Tubing - ANSWERMeasured by Outside Diameter (OD)
Package Boiler - ANSWERComes completely assembled with its own feedwater
pumps, fuel system & draft fans
Firetube, Watertube, Cast Iron - ANSWERThe 3 basic types of boilers (per ASME)
are:
Vertical firetube - ANSWERSingle pass
Turbulator
Gas water heater
Turbulator - ANSWERType of baffle that has three (3) twists
Firebox - ANSWERTwo pass
Low pressure only
Uses stays
QUESTIONS & ANSWERS(GRADED A+)
Special (License Grade) - ANSWERWork in any type of plant
Grade C (License Grade) - ANSWERCan operate low-pressure steam or hot water
(no steam engines/turbines)
67,000 BTU/hr (for licensing) - ANSWER__________ BTU/hr = 1 horsepower
In the boiler room - ANSWERWhere should a boiler license be displayed?
One BTU - ANSWERWhat will raise one pound of water by one degree F
Check water level - ANSWERWhen entering a steam boiler room what is the first
thing an operator should do?
Above 15 psi, above 160 psi water, and temps above 250°F - ANSWERA high
pressure boiler is classified as such when what - ?
Grade B (License Grade) - ANSWERCan operate high-pressure or low-pressure
steam or hot water (no steam engines/turbines)
Grade A (License Grade) - ANSWERCan operate any plant including plants with
steam engines/turbines
Special (License Class) - ANSWERTake Charge (max 50 hpr)
Shift Engineer (max 100 hpr)
2nd Class (License Class) - ANSWERTake Charge (max 100 hpr)
Shift Engineer (max 500 hpr)
1st Class (License Class) - ANSWERTake Charge (max 500 hpr)
Shift Engineer (unlimited hpr)
Chief (License Class) - ANSWERTake Charge (unlimited hpr)
Shift engineer (unlimited hpr)
Shift Engineer - ANSWERCan operate and take responsibility for the plant while on
duty
Take Charge - ANSWERYou are the main person in charge of the plant. You
supervise shift engineers.
1 boiler horsepower = - ANSWER= 10 sq. Ft of heating surface
8.3 - ANSWER1 gallon of water weighs _____ pounds
, 10 kilowatts (for licensing) - ANSWER_____ kilowatts = 1 horsepower
A.S.M.E. Approved - ANSWERWhat type of safety valve is required?
Efficiency - ANSWERWhen operating a boiler, what is most important?
Shuts off fuel in case of low water - ANSWERHow does a low water fuel cut off
(LWCO) protect a boiler?
shut off the burner when a low water condition exists. - ANSWERIf you cannot
determine water level what do you do?
No - ANSWERCan you compress a liquid?
Cast Iron Sectional and Firebox - ANSWERWhat boilers are low pressure only?
Push nipples and Tie Rods - ANSWERWhat holds cast iron sections together?
At least as big as the largest incoming wire - ANSWEROn electric boilers, how large
should the ground wire be?
Baffle - ANSWERDirects flow of combustion gasses, water, and/or steam
Passes - ANSWERAmount of times the heat moves through the tubes in a fire tube
boiler
Refractory - ANSWERHard surface insulation (brick, concrete,...)
Stays - ANSWERHelps keep shape and position of boiler
Tubing - ANSWERMeasured by Outside Diameter (OD)
Package Boiler - ANSWERComes completely assembled with its own feedwater
pumps, fuel system & draft fans
Firetube, Watertube, Cast Iron - ANSWERThe 3 basic types of boilers (per ASME)
are:
Vertical firetube - ANSWERSingle pass
Turbulator
Gas water heater
Turbulator - ANSWERType of baffle that has three (3) twists
Firebox - ANSWERTwo pass
Low pressure only
Uses stays
