MN Boiler License Questions
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1. a question an answer
2. what are the conditions necessary for good combus- c) turbulence, temperature,
tion? time 3T's
a) low sulfur content
b) Thermal, thermocoupler, tubular
c) turbulence, temperature, time 3T's
3. why is secondary air necessary in hand fired boilers? a) Necessary to burn the
a) Necessary to burn the combustible gases combustible gases
b) if primary air should fail
c) used only if sulfur content is high
4. when pressure increases on steam from a given b) decreases
amount of water what happens to its volume and
latent heat?
a) increases
b) decreases
c) remains the same
5. when pressure increases on steam from a given a) increases
amount of water what happens to its temperature?
a) increases
b) decreases
c) remains the same
6. when carbon monoxide (co) is formed and carbon c) more "over the fire" air is
dioxide (co2) is very high what does it generally sig- needed
nify?
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
, MN Boiler License Questions
Study online at https://quizlet.com/_1qrlvi
7. excess air is an expression that refers to: c) air supplied above that
a) overabundance of air theoretically required
b) theoretical amount of air
c) air supplied above that theoretically required
8. a good percentage of carbon dioxide when burning a) 12%
oil is:
a) 12%
b) 8 %
c) 10%
9. what is draft on a boiler in operation? b) difference in pressure
a) Flow of gases through boiler between atmosphere and
b) difference in pressure between atmosphere and furnace or firebox
furnace or firebox
c) difference between atmospheric pressure and
breeching
10. which has greater heating value per pound? a) oil (18000 - 19500 BTU)
a) oil (coal has (6900 - 12910
b) coal BTU))
11. heavy oil must be heated before entering the burner c) get proper atomization
to:
a) increase carbon content
b) decreased sulfur content
c) get proper atomization
12. why should a daily log be kept of flue gas tempera- c) change an operation,
ture? causing heat loss, can be
a) Valuable information in case of explosion detected
b) superintendent files them
, MN Boiler License Questions
Study online at https://quizlet.com/_1qrlvi
c) change an operation, causing heat loss, can be
detected
13. find SWP of a boiler 72 inches in diameter, thickness b) 143.6
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
14. the total heat of steam is 1,188 BTUs, and feed water c) 1.07
temperature is 182 degrees Fahrenheit. What is the
factor of evaporation?
a) 107
b) 10.7
c) 1.07
15. why would viscosity be important in fuel oil? c) effects ease with which it
a) more heat is recovered in water can be handled
b) has more volatile hydrocarbons
c) affects ease with which it can be handled
16. why is too much air objectionable? b) loss of efficiency
a) Cost too high
b) loss of efficiency
c) corrosive effect
17. what is a fyrite used for? a) flue gas analyzer
a) flue gas analyzer
b) combustion programmer
c) water analysis
, MN Boiler License Questions
Study online at https://quizlet.com/_1qrlvi
18. absolute pressure is (ABS): c) atmospheric pressure +
a) atmospheric pressure - gauge pressure gauge pressure
b) gauge pressure minus atmospheric pressure
c) atmospheric pressure + gauge pressure
19. when pressure of steam increases, what happens to a) Goes up
the temperature?
a) Goes up
b) goes down
c) remains the same
20. find the square feet of heating surface of a flu 4" in d) 20.93'sq
diameter and 20' in length:
a) 25'sq
b) 251.32'sq
c) 2513'sq
d) 20.93'sq
21. what is the minimum size of the pipes connecting the a) 3/4 inch
boiler to the water column?
a) 3/4 inch
b) 1 inch
c) 1/2 inch
22. why are crosses used instead of ells on water column c) line may be easily
connections? cleaned
a) Cost less
b) has more strength
c) line may be easily cleaned
23. can you have valves between boiler and water col- a) Yes, if they are locked or
umn? sealed open
a) Yes, if they are locked or sealed open
Study online at https://quizlet.com/_1qrlvi
1. a question an answer
2. what are the conditions necessary for good combus- c) turbulence, temperature,
tion? time 3T's
a) low sulfur content
b) Thermal, thermocoupler, tubular
c) turbulence, temperature, time 3T's
3. why is secondary air necessary in hand fired boilers? a) Necessary to burn the
a) Necessary to burn the combustible gases combustible gases
b) if primary air should fail
c) used only if sulfur content is high
4. when pressure increases on steam from a given b) decreases
amount of water what happens to its volume and
latent heat?
a) increases
b) decreases
c) remains the same
5. when pressure increases on steam from a given a) increases
amount of water what happens to its temperature?
a) increases
b) decreases
c) remains the same
6. when carbon monoxide (co) is formed and carbon c) more "over the fire" air is
dioxide (co2) is very high what does it generally sig- needed
nify?
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
, MN Boiler License Questions
Study online at https://quizlet.com/_1qrlvi
7. excess air is an expression that refers to: c) air supplied above that
a) overabundance of air theoretically required
b) theoretical amount of air
c) air supplied above that theoretically required
8. a good percentage of carbon dioxide when burning a) 12%
oil is:
a) 12%
b) 8 %
c) 10%
9. what is draft on a boiler in operation? b) difference in pressure
a) Flow of gases through boiler between atmosphere and
b) difference in pressure between atmosphere and furnace or firebox
furnace or firebox
c) difference between atmospheric pressure and
breeching
10. which has greater heating value per pound? a) oil (18000 - 19500 BTU)
a) oil (coal has (6900 - 12910
b) coal BTU))
11. heavy oil must be heated before entering the burner c) get proper atomization
to:
a) increase carbon content
b) decreased sulfur content
c) get proper atomization
12. why should a daily log be kept of flue gas tempera- c) change an operation,
ture? causing heat loss, can be
a) Valuable information in case of explosion detected
b) superintendent files them
, MN Boiler License Questions
Study online at https://quizlet.com/_1qrlvi
c) change an operation, causing heat loss, can be
detected
13. find SWP of a boiler 72 inches in diameter, thickness b) 143.6
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
14. the total heat of steam is 1,188 BTUs, and feed water c) 1.07
temperature is 182 degrees Fahrenheit. What is the
factor of evaporation?
a) 107
b) 10.7
c) 1.07
15. why would viscosity be important in fuel oil? c) effects ease with which it
a) more heat is recovered in water can be handled
b) has more volatile hydrocarbons
c) affects ease with which it can be handled
16. why is too much air objectionable? b) loss of efficiency
a) Cost too high
b) loss of efficiency
c) corrosive effect
17. what is a fyrite used for? a) flue gas analyzer
a) flue gas analyzer
b) combustion programmer
c) water analysis
, MN Boiler License Questions
Study online at https://quizlet.com/_1qrlvi
18. absolute pressure is (ABS): c) atmospheric pressure +
a) atmospheric pressure - gauge pressure gauge pressure
b) gauge pressure minus atmospheric pressure
c) atmospheric pressure + gauge pressure
19. when pressure of steam increases, what happens to a) Goes up
the temperature?
a) Goes up
b) goes down
c) remains the same
20. find the square feet of heating surface of a flu 4" in d) 20.93'sq
diameter and 20' in length:
a) 25'sq
b) 251.32'sq
c) 2513'sq
d) 20.93'sq
21. what is the minimum size of the pipes connecting the a) 3/4 inch
boiler to the water column?
a) 3/4 inch
b) 1 inch
c) 1/2 inch
22. why are crosses used instead of ells on water column c) line may be easily
connections? cleaned
a) Cost less
b) has more strength
c) line may be easily cleaned
23. can you have valves between boiler and water col- a) Yes, if they are locked or
umn? sealed open
a) Yes, if they are locked or sealed open
