Minnesota Special Engineer
Boiler License Practice Exam
Questions, Special Boiler
License Practice Exam
Minnesota, Safe Boiler
Operation Fundamentals—
Special Engineer's Guide for
the State of Minnesota,
Practice Test #1, Special Boiler
License Study...
Exam Study Guide – Practice
Questions with Answers.
GRADED A+. Latest 2026/2027
Update.
,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? - Ans✔✔-10 Sq. Ft. Heating Surface
What is meant by the term "Low Pressure Boiler"? - Ans✔✔-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)? - Ans✔✔-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? - Ans✔✔-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? -
Ans✔✔-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? - Ans✔✔-Safety valve and/or an ASME approved safety
relief valve.
A Tri indicator could be found on a: - Ans✔✔-Hot water boiler
,A tri indicator would inform the boiler operator of what? - Ans✔✔-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? -
Ans✔✔-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? - Ans✔✔-Steam first then hot water.
Some of the things you could find on a steam boiler (or hot water boiler) are
what? - Ans✔✔-Low water cut off, safety valve or safety relief valve, pressure
gauge.
What devices would only be found on a steam boiler? - Ans✔✔-Steam pressure
gauge, tricocks, Pressuretrols
An expansion tank or compression tank would be used in what? - Ans✔✔-Hot
water boiler
What is the purpose of the expansion tank? - Ans✔✔-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? - Ans✔✔-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? -
Ans✔✔-Have the valve repaired or replaced.
, Tri cocks or gauge cocks are sued on a steam boiler to indicate? - Ans✔✔-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? - Ans✔✔-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? -
Ans✔✔-Water in the boiler.
True or False: Bottom blow down valves are used for both steam and hot water.
- Ans✔✔-True
Safety valves or safety relief valves should be manually tested at least...? -
Ans✔✔-Monthly
The low water cut out is one of the most important electrical/mechanical
devices on your boiler. How often should you test it? - Ans✔✔-Daily
What device must be located between a hot water boiler and the expansion
tank? - Ans✔✔-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? - Ans✔✔-The expansion tank is water logged, or the isolating
valve for the expansion tank is closed.
Boiler License Practice Exam
Questions, Special Boiler
License Practice Exam
Minnesota, Safe Boiler
Operation Fundamentals—
Special Engineer's Guide for
the State of Minnesota,
Practice Test #1, Special Boiler
License Study...
Exam Study Guide – Practice
Questions with Answers.
GRADED A+. Latest 2026/2027
Update.
,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? - Ans✔✔-10 Sq. Ft. Heating Surface
What is meant by the term "Low Pressure Boiler"? - Ans✔✔-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)? - Ans✔✔-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? - Ans✔✔-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? -
Ans✔✔-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? - Ans✔✔-Safety valve and/or an ASME approved safety
relief valve.
A Tri indicator could be found on a: - Ans✔✔-Hot water boiler
,A tri indicator would inform the boiler operator of what? - Ans✔✔-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? -
Ans✔✔-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? - Ans✔✔-Steam first then hot water.
Some of the things you could find on a steam boiler (or hot water boiler) are
what? - Ans✔✔-Low water cut off, safety valve or safety relief valve, pressure
gauge.
What devices would only be found on a steam boiler? - Ans✔✔-Steam pressure
gauge, tricocks, Pressuretrols
An expansion tank or compression tank would be used in what? - Ans✔✔-Hot
water boiler
What is the purpose of the expansion tank? - Ans✔✔-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? - Ans✔✔-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? -
Ans✔✔-Have the valve repaired or replaced.
, Tri cocks or gauge cocks are sued on a steam boiler to indicate? - Ans✔✔-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? - Ans✔✔-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? -
Ans✔✔-Water in the boiler.
True or False: Bottom blow down valves are used for both steam and hot water.
- Ans✔✔-True
Safety valves or safety relief valves should be manually tested at least...? -
Ans✔✔-Monthly
The low water cut out is one of the most important electrical/mechanical
devices on your boiler. How often should you test it? - Ans✔✔-Daily
What device must be located between a hot water boiler and the expansion
tank? - Ans✔✔-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? - Ans✔✔-The expansion tank is water logged, or the isolating
valve for the expansion tank is closed.
