Minnesota Special Engineer Boiler
License Practice Exam
Questions|Latest Expert
Update(2025-2026)|Verified Exam
Questions with 100% Correct
Answers| All Graded A+.
For the purpose of rating boiler horsepower for an Engineers 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.
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.
An ASME approved safety relieve calve used on a hot water boiler is tested at the
factory on what? - ANSWER✅✅ Steam first then hot water.
Some of the things you could find on a steam boiler (or hot water boiler) are what? -
ANSWER✅✅ Low water cut off, safety valve or safety relief valve, pressure gauge.
What devices would only be found on a steam boiler? - ANSWER✅✅ Steam
pressure gauge, tricocks, Pressuretrols
An expansion tank or compression tank would be used in what? - ANSWER✅✅ Hot
water boiler
What is the purpose of the expansion tank? - ANSWER✅✅ To provide for
expansion and contraction of the water volume as its temperature varies.
On a hot water boiler, what is the purpose of the vent valve? - ANSWER✅✅ To
make sure there is water inside the boiler and to vent any trapped air.
If the safety valve or ASME safety relief valve leaks you would do what? -
ANSWER✅✅ Have the valve repaired or replaced.
Tri cocks or gauge cocks are sued on a steam boiler to indicate? - ANSWER✅✅ The
true water level inside the boiler.
On a steam or hot water boiler, the safety valve or safety relief valve could be tested
by? - ANSWER✅✅ When the boiler is running lifting the lever on the valve or raising
the pressure until they operate.
Before starting a steam or hot water boiler you should check for what? -
ANSWER✅✅ Water in the boiler.
True or False: Bottom blow down valves are used for both steam and hot water. -
ANSWER✅✅ True
Safety valves or safety relief valves should be manually tested at least...? -
ANSWER✅✅ Monthly
License Practice Exam
Questions|Latest Expert
Update(2025-2026)|Verified Exam
Questions with 100% Correct
Answers| All Graded A+.
For the purpose of rating boiler horsepower for an Engineers 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.
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.
An ASME approved safety relieve calve used on a hot water boiler is tested at the
factory on what? - ANSWER✅✅ Steam first then hot water.
Some of the things you could find on a steam boiler (or hot water boiler) are what? -
ANSWER✅✅ Low water cut off, safety valve or safety relief valve, pressure gauge.
What devices would only be found on a steam boiler? - ANSWER✅✅ Steam
pressure gauge, tricocks, Pressuretrols
An expansion tank or compression tank would be used in what? - ANSWER✅✅ Hot
water boiler
What is the purpose of the expansion tank? - ANSWER✅✅ To provide for
expansion and contraction of the water volume as its temperature varies.
On a hot water boiler, what is the purpose of the vent valve? - ANSWER✅✅ To
make sure there is water inside the boiler and to vent any trapped air.
If the safety valve or ASME safety relief valve leaks you would do what? -
ANSWER✅✅ Have the valve repaired or replaced.
Tri cocks or gauge cocks are sued on a steam boiler to indicate? - ANSWER✅✅ The
true water level inside the boiler.
On a steam or hot water boiler, the safety valve or safety relief valve could be tested
by? - ANSWER✅✅ When the boiler is running lifting the lever on the valve or raising
the pressure until they operate.
Before starting a steam or hot water boiler you should check for what? -
ANSWER✅✅ Water in the boiler.
True or False: Bottom blow down valves are used for both steam and hot water. -
ANSWER✅✅ True
Safety valves or safety relief valves should be manually tested at least...? -
ANSWER✅✅ Monthly
