3/18/25, 7:41 PM MN BOILER LICENSE QUESTIONS / ACTUAL TEST QUESTIONS WITH DETAILED VERIFIED ANSWERS / ALREADY GRADED…
MN BOILER LICENSE QUESTIONS / ACTUAL TEST
QUESTIONS WITH DETAILED VERIFIED ANSWERS
/ ALREADY GRADED A+
Save
Terms in this set (258)
a question an answer
what are the conditions c) turbulence, temperature, time 3T's
necessary for good
combustion?
a) low sulfur content
b) Thermal,
thermocoupler, tubular
c) turbulence,
temperature, time 3T's
why is secondary air a) Necessary to burn the combustible gases
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
https://quizlet.com/1019835683/mn-boiler-license-questions-actual-test-questions-with-detailed-verified-answers-already-graded-a-flash-cards/?new 1/28
,3/18/25, 7:41 PM MN BOILER LICENSE QUESTIONS / ACTUAL TEST QUESTIONS WITH DETAILED VERIFIED ANSWERS / ALREADY GRADED…
when pressure increases b) decreases
on steam from a given
amount of water what
happens to its volume and
latent heat?
a) increases
b) decreases
c) remains the same
when pressure increases a) increases
on steam from a given
amount of water what
happens to its
temperature?
a) increases
b) decreases
c) remains the same
when carbon monoxide c) more "over the fire" air is needed
(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
https://quizlet.com/1019835683/mn-boiler-license-questions-actual-test-questions-with-detailed-verified-answers-already-graded-a-flash-cards/?new 2/28
, 3/18/25, 7:41 PM MN BOILER LICENSE QUESTIONS / ACTUAL TEST QUESTIONS WITH DETAILED VERIFIED ANSWERS / ALREADY GRADED…
excess air is an expression c) air supplied above that theoretically required
that refers to:
a) overabundance of air
b) theoretical amount of
air
c) air supplied above that
theoretically required
a good percentage of a) 12%
carbon dioxide when
burning oil is:
a) 12%
b) 8 %
c) 10%
what is draft on a boiler in b) difference in pressure between atmosphere and
operation? furnace or firebox
a) Flow of gases through
boiler
b) difference in pressure
between atmosphere and
furnace or firebox
c) difference between
atmospheric pressure and
breeching
which has greater heating a) oil (18000 - 19500 BTU)
value per pound? (coal has (6900 - 12910 BTU))
a) oil
b) coal
heavy oil must be heated c) get proper atomization
before entering the
burner to:
a) increase carbon
content
b) decreased sulfur
content
c) get proper atomization
https://quizlet.com/1019835683/mn-boiler-license-questions-actual-test-questions-with-detailed-verified-answers-already-graded-a-flash-cards/?new 3/28
MN BOILER LICENSE QUESTIONS / ACTUAL TEST
QUESTIONS WITH DETAILED VERIFIED ANSWERS
/ ALREADY GRADED A+
Save
Terms in this set (258)
a question an answer
what are the conditions c) turbulence, temperature, time 3T's
necessary for good
combustion?
a) low sulfur content
b) Thermal,
thermocoupler, tubular
c) turbulence,
temperature, time 3T's
why is secondary air a) Necessary to burn the combustible gases
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
https://quizlet.com/1019835683/mn-boiler-license-questions-actual-test-questions-with-detailed-verified-answers-already-graded-a-flash-cards/?new 1/28
,3/18/25, 7:41 PM MN BOILER LICENSE QUESTIONS / ACTUAL TEST QUESTIONS WITH DETAILED VERIFIED ANSWERS / ALREADY GRADED…
when pressure increases b) decreases
on steam from a given
amount of water what
happens to its volume and
latent heat?
a) increases
b) decreases
c) remains the same
when pressure increases a) increases
on steam from a given
amount of water what
happens to its
temperature?
a) increases
b) decreases
c) remains the same
when carbon monoxide c) more "over the fire" air is needed
(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
https://quizlet.com/1019835683/mn-boiler-license-questions-actual-test-questions-with-detailed-verified-answers-already-graded-a-flash-cards/?new 2/28
, 3/18/25, 7:41 PM MN BOILER LICENSE QUESTIONS / ACTUAL TEST QUESTIONS WITH DETAILED VERIFIED ANSWERS / ALREADY GRADED…
excess air is an expression c) air supplied above that theoretically required
that refers to:
a) overabundance of air
b) theoretical amount of
air
c) air supplied above that
theoretically required
a good percentage of a) 12%
carbon dioxide when
burning oil is:
a) 12%
b) 8 %
c) 10%
what is draft on a boiler in b) difference in pressure between atmosphere and
operation? furnace or firebox
a) Flow of gases through
boiler
b) difference in pressure
between atmosphere and
furnace or firebox
c) difference between
atmospheric pressure and
breeching
which has greater heating a) oil (18000 - 19500 BTU)
value per pound? (coal has (6900 - 12910 BTU))
a) oil
b) coal
heavy oil must be heated c) get proper atomization
before entering the
burner to:
a) increase carbon
content
b) decreased sulfur
content
c) get proper atomization
https://quizlet.com/1019835683/mn-boiler-license-questions-actual-test-questions-with-detailed-verified-answers-already-graded-a-flash-cards/?new 3/28
