MINNESOTA SPECIAL ENGINEER BOILER LICENSE
PRACTICE EXAM QUESTIONS WITH 100% CORRECT
ANSWERS
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?
CORRECT ANSWER 10 Sq. Ft. Heating Surface
What is meant by the term "Low Pressure Boiler"? CORRECT 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)? CORRECT 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? CORRECT 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? CORRECT
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? CORRECT ANSWER Safety valve and/or an ASME approved safety relief
valve.
A Tri indicator could be found on a: CORRECT ANSWER Hot water boiler
A tri indicator would inform the boiler operator of what? CORRECT 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? CORRECT
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? CORRECT ANSWER Steam first then hot water.
Some of the things you could find on a steam boiler (or hot water boiler) are what?
CORRECT ANSWER Low water cut off, safety valve or safety relief valve, pressure
gauge.
, What devices would only be found on a steam boiler? CORRECT ANSWER Steam
pressure gauge, tricocks, Pressuretrols
An expansion tank or compression tank would be used in what? CORRECT ANSWER
Hot water boiler
What is the purpose of the expansion tank? CORRECT 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? CORRECT 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? CORRECT
ANSWER Have the valve repaired or replaced.
Tri cocks or gauge cocks are sued on a steam boiler to indicate? CORRECT 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? CORRECT 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? CORRECT
ANSWER Water in the boiler.
True or False: Bottom blow down valves are used for both steam and hot water.
CORRECT ANSWER True
Safety valves or safety relief valves should be manually tested at least...? CORRECT
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? CORRECT ANSWER Daily
What device must be located between a hot water boiler and the expansion tank?
CORRECT 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? CORRECT ANSWER The expansion tank is water logged, or the isolating valve
for the expansion tank is closed.
An Aquastat is used on a...? CORRECT ANSWER Hot water boiler
PRACTICE EXAM QUESTIONS WITH 100% CORRECT
ANSWERS
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?
CORRECT ANSWER 10 Sq. Ft. Heating Surface
What is meant by the term "Low Pressure Boiler"? CORRECT 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)? CORRECT 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? CORRECT 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? CORRECT
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? CORRECT ANSWER Safety valve and/or an ASME approved safety relief
valve.
A Tri indicator could be found on a: CORRECT ANSWER Hot water boiler
A tri indicator would inform the boiler operator of what? CORRECT 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? CORRECT
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? CORRECT ANSWER Steam first then hot water.
Some of the things you could find on a steam boiler (or hot water boiler) are what?
CORRECT ANSWER Low water cut off, safety valve or safety relief valve, pressure
gauge.
, What devices would only be found on a steam boiler? CORRECT ANSWER Steam
pressure gauge, tricocks, Pressuretrols
An expansion tank or compression tank would be used in what? CORRECT ANSWER
Hot water boiler
What is the purpose of the expansion tank? CORRECT 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? CORRECT 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? CORRECT
ANSWER Have the valve repaired or replaced.
Tri cocks or gauge cocks are sued on a steam boiler to indicate? CORRECT 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? CORRECT 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? CORRECT
ANSWER Water in the boiler.
True or False: Bottom blow down valves are used for both steam and hot water.
CORRECT ANSWER True
Safety valves or safety relief valves should be manually tested at least...? CORRECT
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? CORRECT ANSWER Daily
What device must be located between a hot water boiler and the expansion tank?
CORRECT 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? CORRECT ANSWER The expansion tank is water logged, or the isolating valve
for the expansion tank is closed.
An Aquastat is used on a...? CORRECT ANSWER Hot water boiler
