MINNESOTA SPECIAL ENGINEER BOILER
LICENSE 2026 PRACTICE QUESTION SET TWO
◉ 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
◉ The bottom blow down line on a steam boiler system is located at
the: Answer: Lowest Point on the waterside of a steam boiler.
◉ For the purpose of rating boiler horsepower for engineer license
classifications only. How many sq. ft. of heating surface shall be
considered equivalent to one boiler horsepower for conventional
boiler? Answer: 10 sq. ft.
◉ What is recommended for boilers that will be out of service a long
time is a possibility of freezing? Answer: A dry lay up.
◉ The rapid burning of fuel oxygen that the results in the release of
heat is called? Answer: Combustion
, ◉ On a steam boiler what is used to reduce the amount of movement
of the water so the operator can get accurate reading of the water
level in the gauge glass? Answer: Water Column
◉ After repair work is done on the boiler what test is used to check
for leaks? Answer: Hydro static test
◉ How can you tell if the sight / gauge glass isn't working properly?
Answer: Water move up and down slowly
◉ What is the best way to test the low water fuel cut off? Answer: An
evaporating test-if the water goes out the glasses before the burner
shuts down secure the fire immediately.
◉ After new boiler is installed, but before it is put into operation,
this test must be performed and witnessed by State Boiler
Inspector? Answer: Hydro static Test
◉ Tri- Cocks or gauge are sued on steam boiler yo indicate? Answer:
The true water level inside the boiler.
◉ On steam or hot boiler, the safety valve or safety relieve valve
could be tested by? Answer: By lifting the lever on the valve or
raising the pressure until they operate.
LICENSE 2026 PRACTICE QUESTION SET TWO
◉ 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
◉ The bottom blow down line on a steam boiler system is located at
the: Answer: Lowest Point on the waterside of a steam boiler.
◉ For the purpose of rating boiler horsepower for engineer license
classifications only. How many sq. ft. of heating surface shall be
considered equivalent to one boiler horsepower for conventional
boiler? Answer: 10 sq. ft.
◉ What is recommended for boilers that will be out of service a long
time is a possibility of freezing? Answer: A dry lay up.
◉ The rapid burning of fuel oxygen that the results in the release of
heat is called? Answer: Combustion
, ◉ On a steam boiler what is used to reduce the amount of movement
of the water so the operator can get accurate reading of the water
level in the gauge glass? Answer: Water Column
◉ After repair work is done on the boiler what test is used to check
for leaks? Answer: Hydro static test
◉ How can you tell if the sight / gauge glass isn't working properly?
Answer: Water move up and down slowly
◉ What is the best way to test the low water fuel cut off? Answer: An
evaporating test-if the water goes out the glasses before the burner
shuts down secure the fire immediately.
◉ After new boiler is installed, but before it is put into operation,
this test must be performed and witnessed by State Boiler
Inspector? Answer: Hydro static Test
◉ Tri- Cocks or gauge are sued on steam boiler yo indicate? Answer:
The true water level inside the boiler.
◉ On steam or hot boiler, the safety valve or safety relieve valve
could be tested by? Answer: By lifting the lever on the valve or
raising the pressure until they operate.
