MN SPECIAL BOILERS LICENSE PREP TEST ANSWERED #21
Special (License Grade) - correct answer Work in any type of plant
Grade C (License Grade) - correct answer Can operate low-pressure steam or hot
water (no steam engines/turbines)
Grade B (License Grade) - correct answer Can operate high-pressure or low-pressure
steam or hot water (no steam engines/turbines)
Grade A (License Grade) - correct answer Can operate any plant including plants with
steam engines/turbines
Special (License Class) - correct answer Take Charge (max 50 hpr)
Shift Engineer (max 100 hpr)
2nd Class (License Class) - correct answer Take Charge (max 100 hpr)
Shift Engineer (max 500 hpr)
1st Class (License Class) - correct answer Take Charge (max 500 hpr)
Shift Engineer (unlimited hpr)
Chief (License Class) - correct answer Take Charge (unlimited hpr)
Shift engineer (unlimited hpr)
Shift Engineer - correct answer Can operate and take responsibility for the plant while
on duty
Take Charge - correct answer You are the main person in charge of the plant. You
supervise shift engineers.
1 boiler horsepower = - correct answer = 10 sq. Ft of heating surface
8.3 - correct answer 1 gallon of water weighs _____ pounds
10 kilowatts (for licensing) - correct answer _____ kilowatts = 1 horsepower
67,000 BTU/hr (for licensing) - correct answer __________ BTU/hr = 1 horsepower
In the boiler room - correct answer Where should a boiler license be displayed?
One BTU - correct answer What will raise one pound of water by one degree F
Check water level - correct answer When 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 - correct answer A high
pressure boiler is classified as such when what - ?
A.S.M.E. Approved - correct answer What type of safety valve is required?
Efficiency - correct answer When operating a boiler, what is most important?
Shuts off fuel in case of low water - correct answer How does a low water fuel cut off
(LWCO) protect a boiler?
Shut off the burner when a low water condition exists. - correct answer If you cannot
determine water level what do you do?
No - correct answer Can you compress a liquid?
Cast Iron Sectional and Firebox - correct answer What boilers are low pressure only?
Push nipples and Tie Rods - correct answer What holds cast iron sections together?
At least as big as the largest incoming wire - correct answer On electric boilers, how
large should the ground wire be?
Baffle - correct answer Directs flow of combustion gasses, water, and/or steam
Passes - correct answer Amount of times the heat moves through the tubes in a fire
tube boiler
Refractory - correct answer Hard surface insulation (brick, concrete,...)
Stays - correct answer Helps keep shape and position of boiler
Tubing - correct answer Measured by Outside Diameter (OD)
Package Boiler - correct answer Comes completely assembled with its own feedwater
pumps, fuel system & draft fans
Firetube, Watertube, Cast Iron - correct answer The 3 basic types of boilers (per ASME)
are:
Pressure Controls - correct answer Steam boilers have __________ ___________ to
control burner (turn burner on and off)
Aquastat - correct answer Hydronic systems have a(n) ______________ to turn the
burner on or off
Low water cut off - correct answer What prevents thermal shock in a hydronic system?
Special (License Grade) - correct answer Work in any type of plant
Grade C (License Grade) - correct answer Can operate low-pressure steam or hot
water (no steam engines/turbines)
Grade B (License Grade) - correct answer Can operate high-pressure or low-pressure
steam or hot water (no steam engines/turbines)
Grade A (License Grade) - correct answer Can operate any plant including plants with
steam engines/turbines
Special (License Class) - correct answer Take Charge (max 50 hpr)
Shift Engineer (max 100 hpr)
2nd Class (License Class) - correct answer Take Charge (max 100 hpr)
Shift Engineer (max 500 hpr)
1st Class (License Class) - correct answer Take Charge (max 500 hpr)
Shift Engineer (unlimited hpr)
Chief (License Class) - correct answer Take Charge (unlimited hpr)
Shift engineer (unlimited hpr)
Shift Engineer - correct answer Can operate and take responsibility for the plant while
on duty
Take Charge - correct answer You are the main person in charge of the plant. You
supervise shift engineers.
1 boiler horsepower = - correct answer = 10 sq. Ft of heating surface
8.3 - correct answer 1 gallon of water weighs _____ pounds
10 kilowatts (for licensing) - correct answer _____ kilowatts = 1 horsepower
67,000 BTU/hr (for licensing) - correct answer __________ BTU/hr = 1 horsepower
In the boiler room - correct answer Where should a boiler license be displayed?
One BTU - correct answer What will raise one pound of water by one degree F
Check water level - correct answer When 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 - correct answer A high
pressure boiler is classified as such when what - ?
A.S.M.E. Approved - correct answer What type of safety valve is required?
Efficiency - correct answer When operating a boiler, what is most important?
Shuts off fuel in case of low water - correct answer How does a low water fuel cut off
(LWCO) protect a boiler?
Shut off the burner when a low water condition exists. - correct answer If you cannot
determine water level what do you do?
No - correct answer Can you compress a liquid?
Cast Iron Sectional and Firebox - correct answer What boilers are low pressure only?
Push nipples and Tie Rods - correct answer What holds cast iron sections together?
At least as big as the largest incoming wire - correct answer On electric boilers, how
large should the ground wire be?
Baffle - correct answer Directs flow of combustion gasses, water, and/or steam
Passes - correct answer Amount of times the heat moves through the tubes in a fire
tube boiler
Refractory - correct answer Hard surface insulation (brick, concrete,...)
Stays - correct answer Helps keep shape and position of boiler
Tubing - correct answer Measured by Outside Diameter (OD)
Package Boiler - correct answer Comes completely assembled with its own feedwater
pumps, fuel system & draft fans
Firetube, Watertube, Cast Iron - correct answer The 3 basic types of boilers (per ASME)
are:
Pressure Controls - correct answer Steam boilers have __________ ___________ to
control burner (turn burner on and off)
Aquastat - correct answer Hydronic systems have a(n) ______________ to turn the
burner on or off
Low water cut off - correct answer What prevents thermal shock in a hydronic system?
