SPECIAL BOILER 2026 CORE EXAM TEST QUESTIONS AND
ANSWERS GUARANTEE A+
✔✔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 - ✔✔c) change an
operation, causing heat loss, can be detected
✔✔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 - ✔✔b) 143.6
✔✔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) 1.07
✔✔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 - ✔✔c) effects ease with which it can be
handled
✔✔why is too much air objectionable?
a) Cost too high
b) loss of efficiency
c) corrosive effect - ✔✔b) loss of efficiency
✔✔what is a fyrite used for?
a) flue gas analyzer
b) combustion programmer
c) water analysis - ✔✔a) flue gas analyzer
✔✔absolute pressure is (ABS):
a) atmospheric pressure - gauge pressure
b) gauge pressure minus atmospheric pressure
c) atmospheric pressure + gauge pressure - ✔✔c) atmospheric pressure + gauge
pressure
✔✔when pressure of steam increases, what happens to the temperature?
,a) Goes up
b) goes down
c) remains the same - ✔✔a) Goes up
✔✔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 - ✔✔d) 20.93'sq
✔✔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 - ✔✔a) 3/4 inch
✔✔why are crosses used instead of ells on water column connections?
a) Cost less
b) has more strength
c) line may be easily cleaned - ✔✔c) line may be easily cleaned
✔✔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
✔✔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
✔✔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) 2"
✔✔a siphon coil (pigtail) is employed in steam gauge line protects the :
a) Bourdon tube
b) piping
c) draft gauge - ✔✔a) Bourdon tube
✔✔what type of shut off would be preferable on a pressure gauge valve that is not used
,a) non-return
b) needle-type
c) cock with a T or lever-type handle - ✔✔c) cock with a T or lever-type handle
✔✔steam gauges shall have a dial graduation of at least:
a) 1 1/2 times the M.A.W.P.
b) same pressure as the boilers
c) 2.0 times the M.A.W.P. - ✔✔a) 1 1/2 times the M.A.W.P.
✔✔what is the function of a feed water regulator?
a) controls temperature of water
b) control solids in the water of boiler
c) control water level in a boiler - ✔✔c) control water level in a boiler
✔✔when two stop valves are used on a steam outlet line, it is good practice to have one
valve :
a) slow opening
b) automatic non-return
c) quick opening - ✔✔b) automatic non-return
✔✔is the valve stem connected to the disc on an automatic non-return valve?
a) no
b) yes
c) only when open - ✔✔a) no
✔✔what must you have between two stop valves on the steam outlet and between the
header line?
a) thermocoupler
b) dial actuated thermostat
c) drain - ✔✔c) drain
✔✔on a globe valve used on feed piping, the inlet shall be:
a) immaterial
b) above the valve disc
c) under the valve disc - ✔✔c) under the valve disc
✔✔which valve offers very little resistance to a flow?
a) gate
b) globe
c) check - ✔✔a) gate
✔✔which valve is used where a flow in one direction only is desired?
a) gate
b) globe
, c) check - ✔✔c) check
✔✔each boiler shall have:
a) only one safety valve
b) two safety valves
c) one or more safety valves
d) two or more safety valves - ✔✔c) one or more safety valves
✔✔a boiler with more than 500 square feet of heating surface must have:
a) one safety valve
b) two or more safety valves
c) three safety valves
d) four safety valves - ✔✔b) two or more safety valves
✔✔if a boiler is fired to full capacity, the header valve being closed, the safety valves or
valve should prevent steam pressure from rising above:
a) 4% above S.W.P. or valve setting
b) 5% above S.W.P. or valve setting
c) 6% above S.W.P. or valve setting
d)10 % above S.W.P. or valve setting - ✔✔c) 6% above S.W.P. or valve setting
✔✔the maximum steaming capacity of a boiler shall be based on the:
a) capacity of the fuel burning equipment, air supply, draft, etc.
b) ability of the fireman
c) type of boiler under test
d) temperature of ht boiler feed water - ✔✔a) capacity of the fuel burning equipment, air
supply, draft, etc.
✔✔one of mare safety valves on the boiler proper shall be set:
a) at or below the maximum allowable working pressure
b) not more than 6% above the maximum allowable working pressure
c) not more than 10% above the maximum allowable working pressure
d) not more than 15% above the maximum allowable working pressure - ✔✔a) at or
below the maximum allowable working pressure
✔✔if additional valves are used, the highest pressure setting shall not exceed the
M.A.W.P. by more than:
a) 3%
b) 4%
c) 5%
d) 6% - ✔✔a) 3%
✔✔safety valves shall be:
a) positive weight
ANSWERS GUARANTEE A+
✔✔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 - ✔✔c) change an
operation, causing heat loss, can be detected
✔✔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 - ✔✔b) 143.6
✔✔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) 1.07
✔✔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 - ✔✔c) effects ease with which it can be
handled
✔✔why is too much air objectionable?
a) Cost too high
b) loss of efficiency
c) corrosive effect - ✔✔b) loss of efficiency
✔✔what is a fyrite used for?
a) flue gas analyzer
b) combustion programmer
c) water analysis - ✔✔a) flue gas analyzer
✔✔absolute pressure is (ABS):
a) atmospheric pressure - gauge pressure
b) gauge pressure minus atmospheric pressure
c) atmospheric pressure + gauge pressure - ✔✔c) atmospheric pressure + gauge
pressure
✔✔when pressure of steam increases, what happens to the temperature?
,a) Goes up
b) goes down
c) remains the same - ✔✔a) Goes up
✔✔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 - ✔✔d) 20.93'sq
✔✔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 - ✔✔a) 3/4 inch
✔✔why are crosses used instead of ells on water column connections?
a) Cost less
b) has more strength
c) line may be easily cleaned - ✔✔c) line may be easily cleaned
✔✔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
✔✔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
✔✔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) 2"
✔✔a siphon coil (pigtail) is employed in steam gauge line protects the :
a) Bourdon tube
b) piping
c) draft gauge - ✔✔a) Bourdon tube
✔✔what type of shut off would be preferable on a pressure gauge valve that is not used
,a) non-return
b) needle-type
c) cock with a T or lever-type handle - ✔✔c) cock with a T or lever-type handle
✔✔steam gauges shall have a dial graduation of at least:
a) 1 1/2 times the M.A.W.P.
b) same pressure as the boilers
c) 2.0 times the M.A.W.P. - ✔✔a) 1 1/2 times the M.A.W.P.
✔✔what is the function of a feed water regulator?
a) controls temperature of water
b) control solids in the water of boiler
c) control water level in a boiler - ✔✔c) control water level in a boiler
✔✔when two stop valves are used on a steam outlet line, it is good practice to have one
valve :
a) slow opening
b) automatic non-return
c) quick opening - ✔✔b) automatic non-return
✔✔is the valve stem connected to the disc on an automatic non-return valve?
a) no
b) yes
c) only when open - ✔✔a) no
✔✔what must you have between two stop valves on the steam outlet and between the
header line?
a) thermocoupler
b) dial actuated thermostat
c) drain - ✔✔c) drain
✔✔on a globe valve used on feed piping, the inlet shall be:
a) immaterial
b) above the valve disc
c) under the valve disc - ✔✔c) under the valve disc
✔✔which valve offers very little resistance to a flow?
a) gate
b) globe
c) check - ✔✔a) gate
✔✔which valve is used where a flow in one direction only is desired?
a) gate
b) globe
, c) check - ✔✔c) check
✔✔each boiler shall have:
a) only one safety valve
b) two safety valves
c) one or more safety valves
d) two or more safety valves - ✔✔c) one or more safety valves
✔✔a boiler with more than 500 square feet of heating surface must have:
a) one safety valve
b) two or more safety valves
c) three safety valves
d) four safety valves - ✔✔b) two or more safety valves
✔✔if a boiler is fired to full capacity, the header valve being closed, the safety valves or
valve should prevent steam pressure from rising above:
a) 4% above S.W.P. or valve setting
b) 5% above S.W.P. or valve setting
c) 6% above S.W.P. or valve setting
d)10 % above S.W.P. or valve setting - ✔✔c) 6% above S.W.P. or valve setting
✔✔the maximum steaming capacity of a boiler shall be based on the:
a) capacity of the fuel burning equipment, air supply, draft, etc.
b) ability of the fireman
c) type of boiler under test
d) temperature of ht boiler feed water - ✔✔a) capacity of the fuel burning equipment, air
supply, draft, etc.
✔✔one of mare safety valves on the boiler proper shall be set:
a) at or below the maximum allowable working pressure
b) not more than 6% above the maximum allowable working pressure
c) not more than 10% above the maximum allowable working pressure
d) not more than 15% above the maximum allowable working pressure - ✔✔a) at or
below the maximum allowable working pressure
✔✔if additional valves are used, the highest pressure setting shall not exceed the
M.A.W.P. by more than:
a) 3%
b) 4%
c) 5%
d) 6% - ✔✔a) 3%
✔✔safety valves shall be:
a) positive weight
