Minnesota Special Engineer Boiler
License Practice Exam Questions and
Verified Correct Answers
10 Sq. Ft. Heating Surface - correct answer ✔✔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?
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.
- correct answer ✔✔What is meant by the term "Low Pressure Boiler"?
High and Low pressure boilers not to exceed a total of 50 boiler horsepower, or a shift engineer
in a 100 horsepower plant. - correct answer ✔✔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)?
In any plant regardless of size under the direct supervision of a properly licensed engineer. -
correct answer ✔✔Special Engineer may serve as an apprentice of what size water/liquid or
steam/vapor boiler?
Shut off the burner when a low water condition exists. - correct answer ✔✔The purpose of low
water cut out on a steam or hot water boiler is to what?
Safety valve and/or an ASME approved safety relief valve. - correct answer ✔✔The valve or
valves that must relieve all excess pressure on a steam or hot water boiler are what?
Hot water boiler - correct answer ✔✔A Tri indicator could be found on a:
, The TEMPERATURE of the water, the PRESSURE of the water in PSIG, and the ALTITUDE of water
in feet. - correct answer ✔✔A tri indicator would inform the boiler operator of what?
The instant release of energy stored in the water as heat. - correct answer ✔✔What is the
destructive force in a steam or hot water boiler explosion?
Steam first then hot water. - correct answer ✔✔An ASME approved safety relieve calve used on
a hot water boiler is tested at the factory on what?
Low water cut off, safety valve or safety relief valve, pressure gauge. - correct answer ✔✔Some
of the things you could find on a steam boiler (or hot water boiler) are what?
Steam pressure gauge, tricocks, Pressuretrols - correct answer ✔✔What devices would only be
found on a steam boiler?
Hot water boiler - correct answer ✔✔An expansion tank or compression tank would be used in
what?
To provide for expansion and contraction of the water volume as its temperature varies. -
correct answer ✔✔What is the purpose of the expansion tank?
To make sure there is water inside the boiler and to vent any trapped air. - correct answer
✔✔On a hot water boiler, what is the purpose of the vent valve?
Have the valve repaired or replaced. - correct answer ✔✔If the safety valve or ASME safety
relief valve leaks you would do what?
License Practice Exam Questions and
Verified Correct Answers
10 Sq. Ft. Heating Surface - correct answer ✔✔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?
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.
- correct answer ✔✔What is meant by the term "Low Pressure Boiler"?
High and Low pressure boilers not to exceed a total of 50 boiler horsepower, or a shift engineer
in a 100 horsepower plant. - correct answer ✔✔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)?
In any plant regardless of size under the direct supervision of a properly licensed engineer. -
correct answer ✔✔Special Engineer may serve as an apprentice of what size water/liquid or
steam/vapor boiler?
Shut off the burner when a low water condition exists. - correct answer ✔✔The purpose of low
water cut out on a steam or hot water boiler is to what?
Safety valve and/or an ASME approved safety relief valve. - correct answer ✔✔The valve or
valves that must relieve all excess pressure on a steam or hot water boiler are what?
Hot water boiler - correct answer ✔✔A Tri indicator could be found on a:
, The TEMPERATURE of the water, the PRESSURE of the water in PSIG, and the ALTITUDE of water
in feet. - correct answer ✔✔A tri indicator would inform the boiler operator of what?
The instant release of energy stored in the water as heat. - correct answer ✔✔What is the
destructive force in a steam or hot water boiler explosion?
Steam first then hot water. - correct answer ✔✔An ASME approved safety relieve calve used on
a hot water boiler is tested at the factory on what?
Low water cut off, safety valve or safety relief valve, pressure gauge. - correct answer ✔✔Some
of the things you could find on a steam boiler (or hot water boiler) are what?
Steam pressure gauge, tricocks, Pressuretrols - correct answer ✔✔What devices would only be
found on a steam boiler?
Hot water boiler - correct answer ✔✔An expansion tank or compression tank would be used in
what?
To provide for expansion and contraction of the water volume as its temperature varies. -
correct answer ✔✔What is the purpose of the expansion tank?
To make sure there is water inside the boiler and to vent any trapped air. - correct answer
✔✔On a hot water boiler, what is the purpose of the vent valve?
Have the valve repaired or replaced. - correct answer ✔✔If the safety valve or ASME safety
relief valve leaks you would do what?
