Minnesota Special Boiler License
EXAM 2025/2026 COMPLETE QUESTIONS
WITH CORRECT DETAILED ANSWERS ||
100% GUARANTEED PASS
<LATEST VERSION>
1. High Pressure Boiler - ANSWER ✓ Above 15psi steam & 160psi water
pressure
2. After blowing down column and glass the water should return how? -
ANSWER ✓ Quickly
3. When entering a steam boiler room what is the first thing an operator should
do? - ANSWER ✓ Check water level
4. What type of safety valve is required - ANSWER ✓ A.S.M.E. approved
direct spring loaded
5. When operating a boiler what is most important? - ANSWER ✓ Safety
6. When draining a boiler how should you cool it? - ANSWER ✓ Slowly
7. How does a low water cut off protect a boiler? - ANSWER ✓ Shuts off fuel
in case of low water
8. State of MN requires boilers to be inspected how often? - ANSWER ✓
Depends if it is steam or hot water.
9. How long do you vent a boiler before starting fires? - ANSWER ✓ 4 air
exchanges
,10.What is the rapid burning of fuel and oxygen resulting in heat? - ANSWER
✓ Combustion
11.What is the purpose of bottom blowdowns besides removing sludge? -
ANSWER ✓ To drain the boiler
12.What turns a hot water boiler on based on water temperature? - ANSWER ✓
An aquastat
13.Steam boilers under 200 horsepower must have low water cutoff tested how
often? - ANSWER ✓ When in operation and on low fire
14.What is an indication of a gauge glass not working properly? - ANSWER ✓
No movement in the water glass
15.When comparing a hot water boiler to a steam boiler, what does a hot water
boiler have that a steam boiler does not? - ANSWER ✓ Circulating pump,
expansion tank, and an aquastat
16.What is the device that will shut the boiler down in case of low water? -
ANSWER ✓ Low water cutoff
17.What must be displayed in a boiler room? - ANSWER ✓ Current license and
log book
18.According to national board code, safety valves are to be tested how often? -
ANSWER ✓ 90 days
19.What device removes air and condensate? - ANSWER ✓ Steam trap
20.What must be done after a hot water boiler has been drained, cleaned and
refilled? - ANSWER ✓ Remove air
21.What can a special engineer operate? - ANSWER ✓ In charge of 50
horsepower. Shift operator 100 horsepower high or low pressure
,22.What are the three main types of boilers? - ANSWER ✓ Fire tube, water
tube, cast iron sectional
23.How much experience is required for a special license? - ANSWER ✓ No
experience
24.At a minimum, what is required in a log book? - ANSWER ✓ Who, what
and when
25.When in operation a 40 horsepower boiler may be left unattended for how
long? - ANSWER ✓ 24 hours
26.What method of testing low water cut off most accurately simulates low
water? - ANSWER ✓ Shutting off the feed pump and feeder valve supply
and blowing down low water cutoff
27.How do we know if we are using and approved safety valve for a steam
boiler or a safety relief valve for a hot water boiler? - ANSWER ✓ A spring
loaded direct acting safety valve or safety relief valve.
28.Before testing a low water fuel cut-out what must be done? - ANSWER ✓
The burner must be on.
29.Heat can be transferred in how many ways? - ANSWER ✓ Three.
30.Aqua stats work by sensing: - ANSWER ✓ Temperature.
31.Name the different ways heat can be transferred and give a definition of each
way. - ANSWER ✓ Radiation, Conduction, Convection
32.How many types of boilers are there? - ANSWER ✓ Three: Fire tube, Water
tube, Cast iron sectional
33.What type of boiler can be made larger? - ANSWER ✓ Cast Iron sectional
34.What type of boiler has the water surrounding the tubes? - ANSWER ✓ Fire
tube
, 35.What type of boiler has the water running through the tubes? - ANSWER ✓
Water tube
36.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
37.What is condensate? - ANSWER ✓ Condensed steam
38.A firing cycle consists of events that safely controls the burning of a fuel.
What even occur first? - ANSWER ✓ Safety controls must be in the circuit.
39.After blowing down the water column and gauge glass you are looking for
the: - ANSWER ✓ Water reentering the gauge glass to rise promptly.
40.Give an example of cold water start for a hot water boiler. - ANSWER ✓
XXX
41.Two low water fuel cut-outs are required when the BTU input of the burner
exceeds: - ANSWER ✓ 750,000
42.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.
43.A boiler with a new burner OR a new boiler room must have: - ANSWER ✓
A kill switch by each door leaving the boiler room.
44.The low water fuel cut off should be tested: - ANSWER ✓ At least once a
day when the boiler is in operation.
45.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.
46.Where would you expect to locate pyrometer? - ANSWER ✓ In the exhaust
gases leaving the boiler
EXAM 2025/2026 COMPLETE QUESTIONS
WITH CORRECT DETAILED ANSWERS ||
100% GUARANTEED PASS
<LATEST VERSION>
1. High Pressure Boiler - ANSWER ✓ Above 15psi steam & 160psi water
pressure
2. After blowing down column and glass the water should return how? -
ANSWER ✓ Quickly
3. When entering a steam boiler room what is the first thing an operator should
do? - ANSWER ✓ Check water level
4. What type of safety valve is required - ANSWER ✓ A.S.M.E. approved
direct spring loaded
5. When operating a boiler what is most important? - ANSWER ✓ Safety
6. When draining a boiler how should you cool it? - ANSWER ✓ Slowly
7. How does a low water cut off protect a boiler? - ANSWER ✓ Shuts off fuel
in case of low water
8. State of MN requires boilers to be inspected how often? - ANSWER ✓
Depends if it is steam or hot water.
9. How long do you vent a boiler before starting fires? - ANSWER ✓ 4 air
exchanges
,10.What is the rapid burning of fuel and oxygen resulting in heat? - ANSWER
✓ Combustion
11.What is the purpose of bottom blowdowns besides removing sludge? -
ANSWER ✓ To drain the boiler
12.What turns a hot water boiler on based on water temperature? - ANSWER ✓
An aquastat
13.Steam boilers under 200 horsepower must have low water cutoff tested how
often? - ANSWER ✓ When in operation and on low fire
14.What is an indication of a gauge glass not working properly? - ANSWER ✓
No movement in the water glass
15.When comparing a hot water boiler to a steam boiler, what does a hot water
boiler have that a steam boiler does not? - ANSWER ✓ Circulating pump,
expansion tank, and an aquastat
16.What is the device that will shut the boiler down in case of low water? -
ANSWER ✓ Low water cutoff
17.What must be displayed in a boiler room? - ANSWER ✓ Current license and
log book
18.According to national board code, safety valves are to be tested how often? -
ANSWER ✓ 90 days
19.What device removes air and condensate? - ANSWER ✓ Steam trap
20.What must be done after a hot water boiler has been drained, cleaned and
refilled? - ANSWER ✓ Remove air
21.What can a special engineer operate? - ANSWER ✓ In charge of 50
horsepower. Shift operator 100 horsepower high or low pressure
,22.What are the three main types of boilers? - ANSWER ✓ Fire tube, water
tube, cast iron sectional
23.How much experience is required for a special license? - ANSWER ✓ No
experience
24.At a minimum, what is required in a log book? - ANSWER ✓ Who, what
and when
25.When in operation a 40 horsepower boiler may be left unattended for how
long? - ANSWER ✓ 24 hours
26.What method of testing low water cut off most accurately simulates low
water? - ANSWER ✓ Shutting off the feed pump and feeder valve supply
and blowing down low water cutoff
27.How do we know if we are using and approved safety valve for a steam
boiler or a safety relief valve for a hot water boiler? - ANSWER ✓ A spring
loaded direct acting safety valve or safety relief valve.
28.Before testing a low water fuel cut-out what must be done? - ANSWER ✓
The burner must be on.
29.Heat can be transferred in how many ways? - ANSWER ✓ Three.
30.Aqua stats work by sensing: - ANSWER ✓ Temperature.
31.Name the different ways heat can be transferred and give a definition of each
way. - ANSWER ✓ Radiation, Conduction, Convection
32.How many types of boilers are there? - ANSWER ✓ Three: Fire tube, Water
tube, Cast iron sectional
33.What type of boiler can be made larger? - ANSWER ✓ Cast Iron sectional
34.What type of boiler has the water surrounding the tubes? - ANSWER ✓ Fire
tube
, 35.What type of boiler has the water running through the tubes? - ANSWER ✓
Water tube
36.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
37.What is condensate? - ANSWER ✓ Condensed steam
38.A firing cycle consists of events that safely controls the burning of a fuel.
What even occur first? - ANSWER ✓ Safety controls must be in the circuit.
39.After blowing down the water column and gauge glass you are looking for
the: - ANSWER ✓ Water reentering the gauge glass to rise promptly.
40.Give an example of cold water start for a hot water boiler. - ANSWER ✓
XXX
41.Two low water fuel cut-outs are required when the BTU input of the burner
exceeds: - ANSWER ✓ 750,000
42.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.
43.A boiler with a new burner OR a new boiler room must have: - ANSWER ✓
A kill switch by each door leaving the boiler room.
44.The low water fuel cut off should be tested: - ANSWER ✓ At least once a
day when the boiler is in operation.
45.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.
46.Where would you expect to locate pyrometer? - ANSWER ✓ In the exhaust
gases leaving the boiler
