BOILER LICENSE EXAM QUESTIONS WITH
REVIEWED 100% CORRECT ANSWERS
GUARANTEED PASS
What joint is subject to the greatest stress? - Answer-Longitudinal joint
What does the bottom blow down/boiler drain do? - Answer-- Removes sludge and
sediment
- Drains the boiler for maintenance and inspection
What is the boiler drain size? - Answer-3/4 -2 1/2 inches (Quarter of an inch to two and
a half inches)
What are the types of hot water boilers? - Answer-fire tube; water tube; cast iron
sectional; condensing; electric
For a boiler to need two blow down valves, they need to have more than _______? -
Answer-100 PSI
What does NOWL stand for? - Answer-Normal Operating Water Level
When should water be at Normal Operating Water Level (NOWL)? - Answer-During
blow down
What is the purpose of a hot water boiler? - Answer-Heats a building that normally does
not heat water passed flash
What occurs in a condensing boiler? - Answer-Condensing vapor from the exhaust
gasses release the latent heat of the water
What do safety relief valves do? - Answer-Open when water is over pressure
What does the temperature pressure gauge indicate? - Answer-Shows temperature and
pressure in hot water systems only (not in steam!!!)
What are the three phases of matter? - Answer-Solid; liquid; gas
What type of boilers do Menasha use? - Answer-Scotch Marine boilers (dry back)
, What are the two types of scotch marine boilers? - Answer-dry back and wet back
What is a dry back scotch marine boiler? - Answer-Less efficient, cheaper, easier to
clean, door on each side
What is a wet back scotch marine boiler? - Answer-More efficient, more costly, harder to
access
What are the characteristics of water tube boilers? - Answer-- Process and power
generation
- 2 or more drums connected by tubes
- Bottom drum(s) is water drum or mud drum
- Top drum is the steam drum
- The tubes connecting the drums are called risers or steam generating tubes
What is a commercial water tube boiler? - Answer-Straight tube, bent tube, flex tube
and membrane
What is a industrial water tube boiler? - Answer-A, O, or D
What are electric boilers? - Answer-Can be steam or hot water
What are the two types of electric boilers? - Answer-Electrode and resistant coil
What is breeching? - Answer-- The exhaust pipe between the boiler and the stack
- When flu gases leave the boiler, they travel through this.
What are the benefits of a superheater? - Answer-- Increases efficiency
- Increases temp but not PSI
- Uses steam longer, reduces moisture which increases steam quality for steam
equipment (turbans and engines)
What does an economizer do? - Answer-Preheats feed water before it enders the steam
drum
What does a reheater do? - Answer-Increases steam pressure for later sections of
turban
What does a preheater do? - Answer-Preheats combustion air before entering furnace
What are the parts of breeching? - Answer-Economizer; reheater; preheater
What do boiler stays do? - Answer-Prevent bulging in areas not supported by tubes
What do water tubes do in boilers? - Answer-Assist in the flow of combustion air
REVIEWED 100% CORRECT ANSWERS
GUARANTEED PASS
What joint is subject to the greatest stress? - Answer-Longitudinal joint
What does the bottom blow down/boiler drain do? - Answer-- Removes sludge and
sediment
- Drains the boiler for maintenance and inspection
What is the boiler drain size? - Answer-3/4 -2 1/2 inches (Quarter of an inch to two and
a half inches)
What are the types of hot water boilers? - Answer-fire tube; water tube; cast iron
sectional; condensing; electric
For a boiler to need two blow down valves, they need to have more than _______? -
Answer-100 PSI
What does NOWL stand for? - Answer-Normal Operating Water Level
When should water be at Normal Operating Water Level (NOWL)? - Answer-During
blow down
What is the purpose of a hot water boiler? - Answer-Heats a building that normally does
not heat water passed flash
What occurs in a condensing boiler? - Answer-Condensing vapor from the exhaust
gasses release the latent heat of the water
What do safety relief valves do? - Answer-Open when water is over pressure
What does the temperature pressure gauge indicate? - Answer-Shows temperature and
pressure in hot water systems only (not in steam!!!)
What are the three phases of matter? - Answer-Solid; liquid; gas
What type of boilers do Menasha use? - Answer-Scotch Marine boilers (dry back)
, What are the two types of scotch marine boilers? - Answer-dry back and wet back
What is a dry back scotch marine boiler? - Answer-Less efficient, cheaper, easier to
clean, door on each side
What is a wet back scotch marine boiler? - Answer-More efficient, more costly, harder to
access
What are the characteristics of water tube boilers? - Answer-- Process and power
generation
- 2 or more drums connected by tubes
- Bottom drum(s) is water drum or mud drum
- Top drum is the steam drum
- The tubes connecting the drums are called risers or steam generating tubes
What is a commercial water tube boiler? - Answer-Straight tube, bent tube, flex tube
and membrane
What is a industrial water tube boiler? - Answer-A, O, or D
What are electric boilers? - Answer-Can be steam or hot water
What are the two types of electric boilers? - Answer-Electrode and resistant coil
What is breeching? - Answer-- The exhaust pipe between the boiler and the stack
- When flu gases leave the boiler, they travel through this.
What are the benefits of a superheater? - Answer-- Increases efficiency
- Increases temp but not PSI
- Uses steam longer, reduces moisture which increases steam quality for steam
equipment (turbans and engines)
What does an economizer do? - Answer-Preheats feed water before it enders the steam
drum
What does a reheater do? - Answer-Increases steam pressure for later sections of
turban
What does a preheater do? - Answer-Preheats combustion air before entering furnace
What are the parts of breeching? - Answer-Economizer; reheater; preheater
What do boiler stays do? - Answer-Prevent bulging in areas not supported by tubes
What do water tubes do in boilers? - Answer-Assist in the flow of combustion air
