MN Boiler License Questions
and Verified Correct Answers
100%
c) turbulence, temperature, time 3T's answer - 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 answer - 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 answer - 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 answer - 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 answer - 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 answer - 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% answer - 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 answer - 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)) answer - which has greater heating value per pound?
a) oil
b) coal
c) get proper atomization answer - 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 answer - 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 answer - 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 answer - 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 answer - 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 answer - why is too much air objectionable?
a) Cost too high
b) loss of efficiency
c) corrosive effect
a) flue gas analyzer answer - what is a fyrite used for?
a) flue gas analyzer
b) combustion programmer
c) water analysis
c) atmospheric pressure + gauge pressure answer - absolute pressure is (ABS):
a) atmospheric pressure - gauge pressure
b) gauge pressure minus atmospheric pressure
c) atmospheric pressure + gauge pressure
a) Goes up answer - when pressure of steam increases, what happens to the temperature?
a) Goes up
b) goes down
and Verified Correct Answers
100%
c) turbulence, temperature, time 3T's answer - 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 answer - 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 answer - 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 answer - 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 answer - 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 answer - 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% answer - 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 answer - 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)) answer - which has greater heating value per pound?
a) oil
b) coal
c) get proper atomization answer - 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 answer - 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 answer - 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 answer - 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 answer - 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 answer - why is too much air objectionable?
a) Cost too high
b) loss of efficiency
c) corrosive effect
a) flue gas analyzer answer - what is a fyrite used for?
a) flue gas analyzer
b) combustion programmer
c) water analysis
c) atmospheric pressure + gauge pressure answer - absolute pressure is (ABS):
a) atmospheric pressure - gauge pressure
b) gauge pressure minus atmospheric pressure
c) atmospheric pressure + gauge pressure
a) Goes up answer - when pressure of steam increases, what happens to the temperature?
a) Goes up
b) goes down
