MN BOILER LICENSE QUESTIONS &
ANSWERS
an answer - correct answers ✔✔a question
c) turbulence, temperature, time 3T's - correct answers ✔✔what are the conditions
necessary for good combustion?
a) low sulfur content
b) Thermal, thermocoupler, tubular
c) turbulence, temperature, time 3T's
a) Necessary to burn the combustible gases - correct answers ✔✔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
,b) decreases - correct answers ✔✔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
a) increases - correct answers ✔✔when pressure increases on steam from a given
amount of water what happens to its temperature?
a) increases
b) decreases
c) remains the same
c) more "over the fire" air is needed - correct answers ✔✔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
c) air supplied above that theoretically required - correct answers ✔✔excess air is an
expression that refers to:
a) overabundance of air
b) theoretical amount of air
c) air supplied above that theoretically required
a) 12% - correct answers ✔✔a good percentage of carbon dioxide when burning oil is:
a) 12%
b) 8 %
c) 10%
b) difference in pressure between atmosphere and furnace or firebox - correct answers
✔✔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
a) oil (18000 - 19500 BTU)
(coal has (6900 - 12910 BTU)) - correct answers ✔✔which has greater heating value
per pound?
a) oil
b) coal
c) get proper atomization - correct answers ✔✔heavy oil must be heated before
entering the burner to:
a) increase carbon content
,b) decreased sulfur content
c) get proper atomization
c) change an operation, causing heat loss, can be detected - correct answers ✔✔why
should a daily log be kept of flue gas temperature?
a) Valuable information in case of explosion
b) superintendent files them
c) change an operation, causing heat loss, can be detected
b) 143.6 - correct answers ✔✔find SWP of a boiler 72 inches in diameter, thickness of
one-half inch, tensile strength of 55,000 pounds, quadruple riveted butt and strap joint
(.94) factor of safety 5:
a) 14.3
b) 143.6
c) 1436
c) 1.07 - correct answers ✔✔the total heat of steam is 1,188 BTUs, and feed water
temperature is 182 degrees Fahrenheit. What is the factor of evaporation?
a) 107
b) 10.7
c) 1.07
c) effects ease with which it can be handled - correct answers ✔✔why would viscosity
be important in fuel oil?
a) more heat is recovered in water
b) has more volatile hydrocarbons
c) affects ease with which it can be handled
b) loss of efficiency - correct answers ✔✔why is too much air objectionable?
a) Cost too high
b) loss of efficiency
c) corrosive effect
a) flue gas analyzer - correct answers ✔✔what is a fyrite used for?
a) flue gas analyzer
b) combustion programmer
c) water analysis
c) atmospheric pressure + gauge pressure - correct answers ✔✔absolute pressure is
(ABS):
a) atmospheric pressure - gauge pressure
b) gauge pressure minus atmospheric pressure
c) atmospheric pressure + gauge pressure
a) Goes up - correct answers ✔✔when pressure of steam increases, what happens to
the temperature?
, a) Goes up
b) goes down
c) remains the same
d) 20.93'sq - correct answers ✔✔find the square feet of heating surface of a flu 4" in
diameter and 20' in length:
a) 25'sq
b) 251.32'sq
c) 2513'sq
d) 20.93'sq
a) 3/4 inch - correct answers ✔✔what is the minimum size of the pipes connecting the
boiler to the water column?
a) 3/4 inch
b) 1 inch
c) 1/2 inch
c) line may be easily cleaned - correct answers ✔✔why are crosses used instead of ells
on water column connections?
a) Cost less
b) has more strength
c) line may be easily cleaned
a) Yes, if they are locked or sealed open - correct answers ✔✔can you have valves
between boiler and water column?
a) Yes, if they are locked or sealed open
b) no, they might be closed accidentally
c) only if the boiler is under 100 horsepower
a) Yes, if they are locked or sealed open - correct answers ✔✔can you have valves
between boiler and water column?
a) Yes, if they are locked or sealed open
b) no, they might be closed accidentally
c) only if the boiler is under 100 horsepower
a) 2" - correct answers ✔✔in the HRT boiler, the fuse plug is located in the rear head,
_____ inches above the top row of tubes.
a) 2"
b) 1/2"
c) 1"
a) Bourdon tube - correct answers ✔✔a siphon coil (pigtail) is employed in steam gauge
line protects the :
a) Bourdon tube
b) piping
c) draft gauge
ANSWERS
an answer - correct answers ✔✔a question
c) turbulence, temperature, time 3T's - correct answers ✔✔what are the conditions
necessary for good combustion?
a) low sulfur content
b) Thermal, thermocoupler, tubular
c) turbulence, temperature, time 3T's
a) Necessary to burn the combustible gases - correct answers ✔✔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
,b) decreases - correct answers ✔✔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
a) increases - correct answers ✔✔when pressure increases on steam from a given
amount of water what happens to its temperature?
a) increases
b) decreases
c) remains the same
c) more "over the fire" air is needed - correct answers ✔✔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
c) air supplied above that theoretically required - correct answers ✔✔excess air is an
expression that refers to:
a) overabundance of air
b) theoretical amount of air
c) air supplied above that theoretically required
a) 12% - correct answers ✔✔a good percentage of carbon dioxide when burning oil is:
a) 12%
b) 8 %
c) 10%
b) difference in pressure between atmosphere and furnace or firebox - correct answers
✔✔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
a) oil (18000 - 19500 BTU)
(coal has (6900 - 12910 BTU)) - correct answers ✔✔which has greater heating value
per pound?
a) oil
b) coal
c) get proper atomization - correct answers ✔✔heavy oil must be heated before
entering the burner to:
a) increase carbon content
,b) decreased sulfur content
c) get proper atomization
c) change an operation, causing heat loss, can be detected - correct answers ✔✔why
should a daily log be kept of flue gas temperature?
a) Valuable information in case of explosion
b) superintendent files them
c) change an operation, causing heat loss, can be detected
b) 143.6 - correct answers ✔✔find SWP of a boiler 72 inches in diameter, thickness of
one-half inch, tensile strength of 55,000 pounds, quadruple riveted butt and strap joint
(.94) factor of safety 5:
a) 14.3
b) 143.6
c) 1436
c) 1.07 - correct answers ✔✔the total heat of steam is 1,188 BTUs, and feed water
temperature is 182 degrees Fahrenheit. What is the factor of evaporation?
a) 107
b) 10.7
c) 1.07
c) effects ease with which it can be handled - correct answers ✔✔why would viscosity
be important in fuel oil?
a) more heat is recovered in water
b) has more volatile hydrocarbons
c) affects ease with which it can be handled
b) loss of efficiency - correct answers ✔✔why is too much air objectionable?
a) Cost too high
b) loss of efficiency
c) corrosive effect
a) flue gas analyzer - correct answers ✔✔what is a fyrite used for?
a) flue gas analyzer
b) combustion programmer
c) water analysis
c) atmospheric pressure + gauge pressure - correct answers ✔✔absolute pressure is
(ABS):
a) atmospheric pressure - gauge pressure
b) gauge pressure minus atmospheric pressure
c) atmospheric pressure + gauge pressure
a) Goes up - correct answers ✔✔when pressure of steam increases, what happens to
the temperature?
, a) Goes up
b) goes down
c) remains the same
d) 20.93'sq - correct answers ✔✔find the square feet of heating surface of a flu 4" in
diameter and 20' in length:
a) 25'sq
b) 251.32'sq
c) 2513'sq
d) 20.93'sq
a) 3/4 inch - correct answers ✔✔what is the minimum size of the pipes connecting the
boiler to the water column?
a) 3/4 inch
b) 1 inch
c) 1/2 inch
c) line may be easily cleaned - correct answers ✔✔why are crosses used instead of ells
on water column connections?
a) Cost less
b) has more strength
c) line may be easily cleaned
a) Yes, if they are locked or sealed open - correct answers ✔✔can you have valves
between boiler and water column?
a) Yes, if they are locked or sealed open
b) no, they might be closed accidentally
c) only if the boiler is under 100 horsepower
a) Yes, if they are locked or sealed open - correct answers ✔✔can you have valves
between boiler and water column?
a) Yes, if they are locked or sealed open
b) no, they might be closed accidentally
c) only if the boiler is under 100 horsepower
a) 2" - correct answers ✔✔in the HRT boiler, the fuse plug is located in the rear head,
_____ inches above the top row of tubes.
a) 2"
b) 1/2"
c) 1"
a) Bourdon tube - correct answers ✔✔a siphon coil (pigtail) is employed in steam gauge
line protects the :
a) Bourdon tube
b) piping
c) draft gauge
