MINNESOTA SPECIAL ENGINEER BOILER LICENSE
EXAM 2025 WITH 500 PRACTICE EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ MN SPECIAL BOILER
LICENSE TEST PREP 2025 (LATEST)
How many way can heat be transferred? - ANSWER-Three (Conduction --
Convection -- Radiation)
How may types of low pressure are there? - ANSWER-Three
Boiler and boiler fitting used in the state of Minnesota must be constructed to what
code? - ANSWER-A.S.M.E
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
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 conditions are necessary to cause a furnace explosion? - ANSWER-
Accumulation of unburned fuel, oxygen and an ignition source
The LWCO should be tested: - ANSWER-Daily
Gauge pressure plus 14.7 psi is called what? - ANSWER-Absolute pressure
The evaporation of 34.5 ponds of water per hour from and at a temperature of 212
degrees Fahrenheit is defined as: - ANSWER-One boiler horsepower
,When a safety valve opens and closes rapidly it is referred to as - ANSWER-
Chattering
Furnace explosions are caused by a buildup of combustible gases, or vapors in the
combustion chamber, what is the term used to remedy this condition? - ANSWER-
Purging
Why is a pigtail or siphon required in steam pressure gauge lines? - ANSWER-to
protect the gauge from a high temperature.
In a stem boiler system, what is the term used for replacing the water that has been
lost by blowing down the boiler through leaks in the system? - ANSWER-A make
up water
On steam boiler system, why are bottom blow down valves installed at the lowest
point of the waterside of boilers? - ANSWER-To remove sludge and sediment.
Boiler heating is defining as : - ANSWER-Water on one side hot gases on the other
side.
In a fire tube boiler, the water - ANSWER-Surrounds the tubes
When the bottom blow down valves are used on a steam boiler, what valve located
closet to the boiler shell? - ANSWER-The quick opening valve
What is the function of an automatic city water feeder on a low pressure boiler? -
ANSWER-To control water to the feed water tank
, The purpose of a safety valve on a steam boiler is to: - ANSWER-To prevent the
boiler from exceeding its MAWP
The control designed as a safety back up, should the operating fail is: - ANSWER-
A high limit control
The capacity of a safety valve used on a steam boiler is measure in: - ANSWER-
pounds of steam that can be discharge in one hour.
How does a pressuretrol attach to the steam space of boiler control the burner
operation? - ANSWER-On pressure decrease - starts the burner.
What action should an operating engineer take if a defect is discovered in a boiler
requiring repairs not of a routine nature? - ANSWER-Notify the boiler inspector.
Boiler are considered low pressure when? - ANSWER-Steam Boiler are not over
15 psi and liquid boiler are not over psi 160 and 250 deg. F
What boiler license required is required for operating a boiler as a shift engineer in
a plant having 3 boiler each 1660 sq. ft. of heating surface? - ANSWER-Second
The maximum temperature to be carried on a low pressure hot water boiler is: -
ANSWER-Less than 250 f
The popping pressure of a safety relief valve on a low pressure hot water heating
boiler cannot exceed: - ANSWER-160 psi
EXAM 2025 WITH 500 PRACTICE EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ MN SPECIAL BOILER
LICENSE TEST PREP 2025 (LATEST)
How many way can heat be transferred? - ANSWER-Three (Conduction --
Convection -- Radiation)
How may types of low pressure are there? - ANSWER-Three
Boiler and boiler fitting used in the state of Minnesota must be constructed to what
code? - ANSWER-A.S.M.E
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
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 conditions are necessary to cause a furnace explosion? - ANSWER-
Accumulation of unburned fuel, oxygen and an ignition source
The LWCO should be tested: - ANSWER-Daily
Gauge pressure plus 14.7 psi is called what? - ANSWER-Absolute pressure
The evaporation of 34.5 ponds of water per hour from and at a temperature of 212
degrees Fahrenheit is defined as: - ANSWER-One boiler horsepower
,When a safety valve opens and closes rapidly it is referred to as - ANSWER-
Chattering
Furnace explosions are caused by a buildup of combustible gases, or vapors in the
combustion chamber, what is the term used to remedy this condition? - ANSWER-
Purging
Why is a pigtail or siphon required in steam pressure gauge lines? - ANSWER-to
protect the gauge from a high temperature.
In a stem boiler system, what is the term used for replacing the water that has been
lost by blowing down the boiler through leaks in the system? - ANSWER-A make
up water
On steam boiler system, why are bottom blow down valves installed at the lowest
point of the waterside of boilers? - ANSWER-To remove sludge and sediment.
Boiler heating is defining as : - ANSWER-Water on one side hot gases on the other
side.
In a fire tube boiler, the water - ANSWER-Surrounds the tubes
When the bottom blow down valves are used on a steam boiler, what valve located
closet to the boiler shell? - ANSWER-The quick opening valve
What is the function of an automatic city water feeder on a low pressure boiler? -
ANSWER-To control water to the feed water tank
, The purpose of a safety valve on a steam boiler is to: - ANSWER-To prevent the
boiler from exceeding its MAWP
The control designed as a safety back up, should the operating fail is: - ANSWER-
A high limit control
The capacity of a safety valve used on a steam boiler is measure in: - ANSWER-
pounds of steam that can be discharge in one hour.
How does a pressuretrol attach to the steam space of boiler control the burner
operation? - ANSWER-On pressure decrease - starts the burner.
What action should an operating engineer take if a defect is discovered in a boiler
requiring repairs not of a routine nature? - ANSWER-Notify the boiler inspector.
Boiler are considered low pressure when? - ANSWER-Steam Boiler are not over
15 psi and liquid boiler are not over psi 160 and 250 deg. F
What boiler license required is required for operating a boiler as a shift engineer in
a plant having 3 boiler each 1660 sq. ft. of heating surface? - ANSWER-Second
The maximum temperature to be carried on a low pressure hot water boiler is: -
ANSWER-Less than 250 f
The popping pressure of a safety relief valve on a low pressure hot water heating
boiler cannot exceed: - ANSWER-160 psi
