MINNESOTA SPECIAL ENGINEER BOILER
LICENSE PRACTICE EXAM 2025 WITH
QUESTIONS AND WELL-VERIFIED ANSWERS |
ALREADY GRADED A+ | GUARANTEED PASS |
MINNESOTA ACTUAL LATEST EXAM
For the purpose of rating boiler horsepower for an engineer's License only, how
many square feet of boiler surface shall be equivalent to one boiler horsepower on
a boiler? - ANSWER- 10 Sq. Ft. Heating Surface
What is meant by the term "Low-Pressure Boiler"? - ANSWER- Boilers operating
at a steam or other vapor pressure of 15psig or less, or a hot water or other liquid
boiler in which the pressure does not exceed 160 psig or a temperature of 250
degrees F.
Safety valves or safety relief valves should be manually tested at least...? -
ANSWER- Monthly
The low water cut out is one of the most important electrical/mechanical devices
on your boiler. How often should you test it? - ANSWER- Daily
What device must be located between a hot water boiler and the expansion tank? -
ANSWER- A shut off valve so the expansion can be isolated and drained during
operation of the boiler.
,On a hot water boiler, every time the burner operates the safety relief valve opens.
Why? - ANSWER- The expansion tank is water logged, or the isolating valve for
the expansion tank is closed.
An Aquastat is used on a...? - ANSWER- Hot water boiler
To reduce thermal shock on hot water boilers, what devices are used? - ANSWER-
Low limit or low fire hold control, three-way valve, run around pump.
On a steam boiler the control named operator will... - ANSWER- On pressure
decrease: Start. On pressure increase: Stop.
On a steam boiler what is a siphon or pigtail used for? - ANSWER- To protect the
steam gauge from too high of temperature.
What is one reason causing the expansion tank to fill with water? - ANSWER- Air
leaks from the gauge glass fitting.
What would you do if you cam into a boiler room and found no water in the boiler?
- ANSWER- Shut off the burner and allow boiler to cool.
What is the purpose of the bottom blow down on a steam boiler? - ANSWER- To
remove sludge and sediment and to drain the boiler.
When blowing down the water column the water should do what? - ANSWER-
Refill the gauge glass quickly.
When doing the annual boiler inspection, the boiler should... - ANSWER- Water
and fire side cleaned and inspection ports open.
, Purging is part of what cycle? - ANSWER- Firing cycle
All steam traps will prevent steam from passing through them but will allow what
to pass through them? - ANSWER- Dirt, air, and condensate.
A person holding a current State of Minnesota Special Engineers License could be
in charge of, or a shift engineer in what size plant(s)? - ANSWER- High and Low
pressure boilers not to exceed a total of 50 boiler horsepower, or a shift engineer in
a 100 horsepower plant.
Special Engineer may serve as an apprentice of what size water/liquid or
steam/vapor boiler? - ANSWER- In any plant regardless of size under the direct
supervision of a properly licensed engineer.
The purpose of low water cut out on a steam or hot water boiler is to what? -
ANSWER- Shut off the burner when a low water condition exists.
The valve or valves that must relieve all excess pressure on a steam or hot water
boiler are what? - ANSWER- Safety valve and/or an ASME approved safety relief
valve.
A Tri indicator could be found on a: - ANSWER- Hot water boiler
A tri indicator would inform the boiler operator of what? - ANSWER- The
TEMPERATURE of the water, the PRESSURE of the water in PSIG, and the
ALTITUDE of water in feet.
What is the destructive force in a steam or hot water boiler explosion? -
ANSWER- The instant release of energy stored in the water as heat.
LICENSE PRACTICE EXAM 2025 WITH
QUESTIONS AND WELL-VERIFIED ANSWERS |
ALREADY GRADED A+ | GUARANTEED PASS |
MINNESOTA ACTUAL LATEST EXAM
For the purpose of rating boiler horsepower for an engineer's License only, how
many square feet of boiler surface shall be equivalent to one boiler horsepower on
a boiler? - ANSWER- 10 Sq. Ft. Heating Surface
What is meant by the term "Low-Pressure Boiler"? - ANSWER- Boilers operating
at a steam or other vapor pressure of 15psig or less, or a hot water or other liquid
boiler in which the pressure does not exceed 160 psig or a temperature of 250
degrees F.
Safety valves or safety relief valves should be manually tested at least...? -
ANSWER- Monthly
The low water cut out is one of the most important electrical/mechanical devices
on your boiler. How often should you test it? - ANSWER- Daily
What device must be located between a hot water boiler and the expansion tank? -
ANSWER- A shut off valve so the expansion can be isolated and drained during
operation of the boiler.
,On a hot water boiler, every time the burner operates the safety relief valve opens.
Why? - ANSWER- The expansion tank is water logged, or the isolating valve for
the expansion tank is closed.
An Aquastat is used on a...? - ANSWER- Hot water boiler
To reduce thermal shock on hot water boilers, what devices are used? - ANSWER-
Low limit or low fire hold control, three-way valve, run around pump.
On a steam boiler the control named operator will... - ANSWER- On pressure
decrease: Start. On pressure increase: Stop.
On a steam boiler what is a siphon or pigtail used for? - ANSWER- To protect the
steam gauge from too high of temperature.
What is one reason causing the expansion tank to fill with water? - ANSWER- Air
leaks from the gauge glass fitting.
What would you do if you cam into a boiler room and found no water in the boiler?
- ANSWER- Shut off the burner and allow boiler to cool.
What is the purpose of the bottom blow down on a steam boiler? - ANSWER- To
remove sludge and sediment and to drain the boiler.
When blowing down the water column the water should do what? - ANSWER-
Refill the gauge glass quickly.
When doing the annual boiler inspection, the boiler should... - ANSWER- Water
and fire side cleaned and inspection ports open.
, Purging is part of what cycle? - ANSWER- Firing cycle
All steam traps will prevent steam from passing through them but will allow what
to pass through them? - ANSWER- Dirt, air, and condensate.
A person holding a current State of Minnesota Special Engineers License could be
in charge of, or a shift engineer in what size plant(s)? - ANSWER- High and Low
pressure boilers not to exceed a total of 50 boiler horsepower, or a shift engineer in
a 100 horsepower plant.
Special Engineer may serve as an apprentice of what size water/liquid or
steam/vapor boiler? - ANSWER- In any plant regardless of size under the direct
supervision of a properly licensed engineer.
The purpose of low water cut out on a steam or hot water boiler is to what? -
ANSWER- Shut off the burner when a low water condition exists.
The valve or valves that must relieve all excess pressure on a steam or hot water
boiler are what? - ANSWER- Safety valve and/or an ASME approved safety relief
valve.
A Tri indicator could be found on a: - ANSWER- Hot water boiler
A tri indicator would inform the boiler operator of what? - ANSWER- The
TEMPERATURE of the water, the PRESSURE of the water in PSIG, and the
ALTITUDE of water in feet.
What is the destructive force in a steam or hot water boiler explosion? -
ANSWER- The instant release of energy stored in the water as heat.
