Minnesota Special Engineer Boiler License Exam
2025 With 400 Practice Exam Questions and
Correct Verified Answers/ MN Special Boiler
License Test Prep 2025 (Latest)
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.
Boiler and boiler fitting used in the state of Minnesota must be constructed to what
code? - ANSWER-A.S.M.E
Boiler room log books area state of Minnesota requirement for ever boiler room,
what are some of the things you should be writing down in the book? - ANSWER-
The log entry should start out with today's date NEXT what you did you do in the
boiler room NEXT sign your name
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
A boiler weighs 1000 pounds empty filling the boiler with water to its normal
operating level requires 500 gal. What is the total weight of the boiler and water? -
ANSWER-5165
pg. 1
,On a steam boiler what is the unit called that is used to reduce the amount of
movement of the water so the boiler operator can get an accurate reading of the
water level in the gauge glass? - ANSWER-Water Column
if idle boilers are left filled with water, what precaution should be taken to prevent
corrosion an oxygen pitting? - ANSWER-keep the boiler water properly treated
A boiler equipped with the two low water fuel cut-outs must have
_______________ on the secondary low water fuel cut-out. - ANSWER-A manual
reset.
A boiler with a new burner OR a new boiler room must have: - ANSWER-A kill
switch by each door leaving the boiler room.
The low water fuel cut off should be tested: - ANSWER-At least once a day when
the boiler is in operation.
What is the purpose of a check valve used in a feed water line going to a steam
boiler? - ANSWER-To restrict the flow in one direction only.
Where would you expect to locate pyrometer? - ANSWER-In the exhaust gases
leaving the boiler
What would the pyrometer tell you? - ANSWER-The temperature
An aqua state would be used on what type of boiler? - ANSWER-A hot water
boiler
pg. 2
,Globe valves are used when you need to: - ANSWER-Throttle or restrict the flow
Three types of drafts are: - ANSWER-Natural, forced, and induced.
How many way can heat be transferred? - ANSWER-Three (Conduction --
Convection -- Radiation)
How may types of low pressure are there? - ANSWER-Three
What controls the starting ans stopping of the burner by sending the temperature of
the water in a hot water boiler? - ANSWER-Aqua Stat
When a hydrostatic test of a boiler exceeds the maximum allowed working
pressure each safety valve, if left attached to the boiler, should: - ANSWER-Have
its valve disc held to its seat by means of testing clamp or "gag"
Heat can be transferred in three ways and they are: - ANSWER-Conduction --
Convection - Radiation
The first sequence in the series of automatic burner control is: - ANSWER-Purging
Can a low water low water condition i a hot water heating type boiler? -
ANSWER-Yes, for numerous reasons
Other than a safety relieve valve what other safety device should be installed on a
hot water heating boiler? - ANSWER-Low water cut off
pg. 3
, Each boiler in a battery (pipe together sharing the same common header) must
have: - ANSWER-A main stem stop
what removes air from a hot water boiler system? - ANSWER-Air Control
In a stem boiler system, the unit that turns be burner on and off based on steam
pressure is the: - ANSWER-Pressure Control
If water in the gauge is not visible because of failure of the feed water supply, what
should be done? - ANSWER-Shut off the fuel to the burner and secure the boiler.
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.
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.
pg. 4
2025 With 400 Practice Exam Questions and
Correct Verified Answers/ MN Special Boiler
License Test Prep 2025 (Latest)
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.
Boiler and boiler fitting used in the state of Minnesota must be constructed to what
code? - ANSWER-A.S.M.E
Boiler room log books area state of Minnesota requirement for ever boiler room,
what are some of the things you should be writing down in the book? - ANSWER-
The log entry should start out with today's date NEXT what you did you do in the
boiler room NEXT sign your name
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
A boiler weighs 1000 pounds empty filling the boiler with water to its normal
operating level requires 500 gal. What is the total weight of the boiler and water? -
ANSWER-5165
pg. 1
,On a steam boiler what is the unit called that is used to reduce the amount of
movement of the water so the boiler operator can get an accurate reading of the
water level in the gauge glass? - ANSWER-Water Column
if idle boilers are left filled with water, what precaution should be taken to prevent
corrosion an oxygen pitting? - ANSWER-keep the boiler water properly treated
A boiler equipped with the two low water fuel cut-outs must have
_______________ on the secondary low water fuel cut-out. - ANSWER-A manual
reset.
A boiler with a new burner OR a new boiler room must have: - ANSWER-A kill
switch by each door leaving the boiler room.
The low water fuel cut off should be tested: - ANSWER-At least once a day when
the boiler is in operation.
What is the purpose of a check valve used in a feed water line going to a steam
boiler? - ANSWER-To restrict the flow in one direction only.
Where would you expect to locate pyrometer? - ANSWER-In the exhaust gases
leaving the boiler
What would the pyrometer tell you? - ANSWER-The temperature
An aqua state would be used on what type of boiler? - ANSWER-A hot water
boiler
pg. 2
,Globe valves are used when you need to: - ANSWER-Throttle or restrict the flow
Three types of drafts are: - ANSWER-Natural, forced, and induced.
How many way can heat be transferred? - ANSWER-Three (Conduction --
Convection -- Radiation)
How may types of low pressure are there? - ANSWER-Three
What controls the starting ans stopping of the burner by sending the temperature of
the water in a hot water boiler? - ANSWER-Aqua Stat
When a hydrostatic test of a boiler exceeds the maximum allowed working
pressure each safety valve, if left attached to the boiler, should: - ANSWER-Have
its valve disc held to its seat by means of testing clamp or "gag"
Heat can be transferred in three ways and they are: - ANSWER-Conduction --
Convection - Radiation
The first sequence in the series of automatic burner control is: - ANSWER-Purging
Can a low water low water condition i a hot water heating type boiler? -
ANSWER-Yes, for numerous reasons
Other than a safety relieve valve what other safety device should be installed on a
hot water heating boiler? - ANSWER-Low water cut off
pg. 3
, Each boiler in a battery (pipe together sharing the same common header) must
have: - ANSWER-A main stem stop
what removes air from a hot water boiler system? - ANSWER-Air Control
In a stem boiler system, the unit that turns be burner on and off based on steam
pressure is the: - ANSWER-Pressure Control
If water in the gauge is not visible because of failure of the feed water supply, what
should be done? - ANSWER-Shut off the fuel to the burner and secure the boiler.
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.
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.
pg. 4
