MINNESOTA BOILER EXAM 2025 LATEST PREP TEST
BANK WITH 300 REAL EXAM QUESTIONS AND
CORRECT ANSWERS/ MN BOILER LICENSE TEST 2025/
MN BOILER OPERATOR EXAM 2025 (NEWEST!)
For purposes of the exam, experience must be obtained within the previous how
many years?
a) 5
b) 20
c) 10 - ANSWER-c) 10
For purposes of the exam a "year of experience" is defined as?
a) a twelve month period for low pressure boiler, including off season
maintenance.
b) 2,000 hrs or more
c) all of above - ANSWER-c) all of above
For purposes of the exam only, a boiler horsepower is defined as?
a) 10 sq ft of heating surface
b) boiler BTU input / 676,000
c) 10 kw
d) all of above - ANSWER-a) 10 sq ft of heating surface
b) boiler BTU input / 676,000
c) 10 kw
d) all of above
,a high pressure boiler plant of 30 or less bhp must be attended (checked) to?
a) daily
b) 4 hours a day
c) cannot be left unattended over consecutive 2 hrs - ANSWER-a) daily
a high pressure boiler plant of 31 to 200 bhp must be attended (checked) to?
a) daily
b) 4 hours a day
c) cannot be left unattended over consecutive 2 hrs - ANSWER-c) cannot be left
unattended over consecutive 2 hrs
a high pressure boiler plant of over 200 bhp must be attended ?
a) may be left for 15 mins as long as they are within 500ft of boiler room
b) may be left for 30 mins as long as they are within 500ft of boiler room
c) cannot approach near continuous absence - ANSWER-b) may be left for 30 mins
as long as they are within 500ft of boiler room
c) cannot approach near continuous absence
what are the conditions necessary for good combustion?
a) low sulfur content
b) Thermal, thermocoupler, tubular
c) turbulence, temperature, time 3T's - ANSWER-c) turbulence, temperature, time
3T's
,why is secondary air necessary in hand fired boilers?
a) Necessary to burn the combustible gases
b) if primary air should fail
c) used only if sulfur content is high - ANSWER-a) Necessary to burn the
combustible gases
when pressure increases on steam from a given amount of water what happens to
its volume and latent heat?
a) increases
b) decreases
c) remains the same - ANSWER-b) decreases
when pressure increases on steam from a given amount of water what happens to
its temperature?
a) increases
b) decreases
c) remains the same - ANSWER-a) increases
when carbon monoxide (co) is formed and carbon dioxide (co2) is very high what
does it generally signify?
a) More "under the fire air" is needed
b) less "under the fire air" is required
c) more "over the fire" air is needed
d) less "over the fire" is needed less - ANSWER-c) more "over the fire" air is
needed
, excess air is an expression that refers to:
a) overabundance of air
b) theoretical amount of air
c) air supplied above that theoretically required - ANSWER-c) air supplied above
that theoretically required
a good percentage of carbon dioxide when burning oil is:
a) 12%
b) 8 %
c) 10% - ANSWER-a) 12%
what is draft on a boiler in operation?
a) Flow of gases through boiler
b) difference in pressure between atmosphere and furnace or firebox
c) difference between atmospheric pressure and breeching - ANSWER-b)
difference in pressure between atmosphere and furnace or firebox
which has greater heating value per pound?
a) oil
b) coal - ANSWER-a) oil (18000 - 19500 BTU)
(coal has (6900 - 12910 BTU))
heavy oil must be heated before entering the burner to:
a) increase carbon content
BANK WITH 300 REAL EXAM QUESTIONS AND
CORRECT ANSWERS/ MN BOILER LICENSE TEST 2025/
MN BOILER OPERATOR EXAM 2025 (NEWEST!)
For purposes of the exam, experience must be obtained within the previous how
many years?
a) 5
b) 20
c) 10 - ANSWER-c) 10
For purposes of the exam a "year of experience" is defined as?
a) a twelve month period for low pressure boiler, including off season
maintenance.
b) 2,000 hrs or more
c) all of above - ANSWER-c) all of above
For purposes of the exam only, a boiler horsepower is defined as?
a) 10 sq ft of heating surface
b) boiler BTU input / 676,000
c) 10 kw
d) all of above - ANSWER-a) 10 sq ft of heating surface
b) boiler BTU input / 676,000
c) 10 kw
d) all of above
,a high pressure boiler plant of 30 or less bhp must be attended (checked) to?
a) daily
b) 4 hours a day
c) cannot be left unattended over consecutive 2 hrs - ANSWER-a) daily
a high pressure boiler plant of 31 to 200 bhp must be attended (checked) to?
a) daily
b) 4 hours a day
c) cannot be left unattended over consecutive 2 hrs - ANSWER-c) cannot be left
unattended over consecutive 2 hrs
a high pressure boiler plant of over 200 bhp must be attended ?
a) may be left for 15 mins as long as they are within 500ft of boiler room
b) may be left for 30 mins as long as they are within 500ft of boiler room
c) cannot approach near continuous absence - ANSWER-b) may be left for 30 mins
as long as they are within 500ft of boiler room
c) cannot approach near continuous absence
what are the conditions necessary for good combustion?
a) low sulfur content
b) Thermal, thermocoupler, tubular
c) turbulence, temperature, time 3T's - ANSWER-c) turbulence, temperature, time
3T's
,why is secondary air necessary in hand fired boilers?
a) Necessary to burn the combustible gases
b) if primary air should fail
c) used only if sulfur content is high - ANSWER-a) Necessary to burn the
combustible gases
when pressure increases on steam from a given amount of water what happens to
its volume and latent heat?
a) increases
b) decreases
c) remains the same - ANSWER-b) decreases
when pressure increases on steam from a given amount of water what happens to
its temperature?
a) increases
b) decreases
c) remains the same - ANSWER-a) increases
when carbon monoxide (co) is formed and carbon dioxide (co2) is very high what
does it generally signify?
a) More "under the fire air" is needed
b) less "under the fire air" is required
c) more "over the fire" air is needed
d) less "over the fire" is needed less - ANSWER-c) more "over the fire" air is
needed
, excess air is an expression that refers to:
a) overabundance of air
b) theoretical amount of air
c) air supplied above that theoretically required - ANSWER-c) air supplied above
that theoretically required
a good percentage of carbon dioxide when burning oil is:
a) 12%
b) 8 %
c) 10% - ANSWER-a) 12%
what is draft on a boiler in operation?
a) Flow of gases through boiler
b) difference in pressure between atmosphere and furnace or firebox
c) difference between atmospheric pressure and breeching - ANSWER-b)
difference in pressure between atmosphere and furnace or firebox
which has greater heating value per pound?
a) oil
b) coal - ANSWER-a) oil (18000 - 19500 BTU)
(coal has (6900 - 12910 BTU))
heavy oil must be heated before entering the burner to:
a) increase carbon content
