Boiler License Test 2025 Latest Prep Test Bank With
400 Questions and Correct Verified Answers/ Boiler
Operator License Exam 2025 Practice Test (Brand
New!)
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
b) decreased sulfur content
c) get proper atomization ......answer.....c) get proper atomization
why should a daily log be kept of flue gas temperature?
a) Valuable information in case of explosion
400 Questions and Correct Verified Answers/ Boiler
Operator License Exam 2025 Practice Test (Brand
New!)
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
b) decreased sulfur content
c) get proper atomization ......answer.....c) get proper atomization
why should a daily log be kept of flue gas temperature?
a) Valuable information in case of explosion
