SPECIAL BOILER LICENSE PRACTICE EXAM
FULL SOLUTION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◉ The low-water fuel cut off is tested by blowing its float chamber
or doing a(n) ______test? Answer: Evaportaion
◉ According to the Minnesota boiler statues a high pressure boiler
plant 31 to 200 horsepower may be left in operation unattended by
an operating engineer for no more than _______consecutive hours
when the permisses are occupied by employees or the public?
Answer: Two
◉ In most US jurisdictions , a(n)________boiler inspection is
mandated by law? Answer: Annual
◉ Boiler operating data commonly recorded in a boiler room
logbook includes? Answer: When the boiler checks were made, Who
made the boiler checks, What specific checks were made.
◉ The most important common steam pressure gauge by the
movement of a(n). Answer: Bourdon Tube
,◉ A high pressure steam boiler is a boiler with an MAVP of more
than_______psi? Answer: 15
◉ When performing an evaporation test, the water in the
sight/gauge glass_______? Answer: Must be visible the operator at all
times.
◉ Boilers equipped with 2 LWCO's must have what on the auxiliary
LWCO? Answer: Manual reset
◉ An indicator of soot build-up on a boiler is? Answer: High Stack
temperature
◉ The purpose of the lever on a safety valve is? Answer: To test the
operation
◉ What elements in fuel are need to create combustion?
1.) Carbon 2.) Mercury 3.) Ash 4.) Nitrogen 5.) Hydrogen Answer: 1.
Carbon and 5. Hydrogen
◉ first law of thermodynamics Answer: Energy cannot be created or
destroyed
,◉ second law of thermodynamics Answer: Heat flows from a higher
temperature material to a lower temperature material
◉ How does the boiling point of water change with steam pressure?
Answer: The boiling point of water increases as steam pressure
increases
◉ latent heat Answer: Heat that causes a state change but doesn't
change the temperature
◉ sensible heat Answer: Heat that causes a temperature change
without a state change
◉ Conduction Answer: The direct transfer of heat from one
substance to another substance that it is touching.
◉ Convection Answer: The transfer of heat by the movement of a
fluid
◉ Radiation Answer: Energy that is radiated or transmitted in the
form of rays or waves or particles. Produced upon contact with
opaque objects
, ◉ What are examples of conduction, convection, and radiation in a
boiler? Answer: Heat radiates from combustion flames to the metal
surfaces of the boiler, the metal surfaces conduct heat from the hot
side to the cooler side where metal is covered by water or steam.
Heat moves within the steam/hot water via convection.
◉ Firetube boiler Answer: A boiler with tubes of combustion gases
passing through the water space.
◉ Watertube boiler Answer: A boiler in which water passes through
tubes surrounded by gases of combustion. It provides greater
horsepower, steam volume, and pressures.
◉ Low pressure steam heating boiler Answer: Steam is supplied at
pressures up to 15 psi
◉ Low Pressure Hot Water Heating Boiler Answer: Supplies hot
water at pressure up to 160 psi and a T less than 250°F
◉ Hot Water Supply Boiler Answer: For space heating at pressures
of not more than 160 psi and T under 210°F
◉ Power Hot Water Boiler Answer: Heats liquid to a p greater than
160 psi or a T greater than 250°F
FULL SOLUTION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◉ The low-water fuel cut off is tested by blowing its float chamber
or doing a(n) ______test? Answer: Evaportaion
◉ According to the Minnesota boiler statues a high pressure boiler
plant 31 to 200 horsepower may be left in operation unattended by
an operating engineer for no more than _______consecutive hours
when the permisses are occupied by employees or the public?
Answer: Two
◉ In most US jurisdictions , a(n)________boiler inspection is
mandated by law? Answer: Annual
◉ Boiler operating data commonly recorded in a boiler room
logbook includes? Answer: When the boiler checks were made, Who
made the boiler checks, What specific checks were made.
◉ The most important common steam pressure gauge by the
movement of a(n). Answer: Bourdon Tube
,◉ A high pressure steam boiler is a boiler with an MAVP of more
than_______psi? Answer: 15
◉ When performing an evaporation test, the water in the
sight/gauge glass_______? Answer: Must be visible the operator at all
times.
◉ Boilers equipped with 2 LWCO's must have what on the auxiliary
LWCO? Answer: Manual reset
◉ An indicator of soot build-up on a boiler is? Answer: High Stack
temperature
◉ The purpose of the lever on a safety valve is? Answer: To test the
operation
◉ What elements in fuel are need to create combustion?
1.) Carbon 2.) Mercury 3.) Ash 4.) Nitrogen 5.) Hydrogen Answer: 1.
Carbon and 5. Hydrogen
◉ first law of thermodynamics Answer: Energy cannot be created or
destroyed
,◉ second law of thermodynamics Answer: Heat flows from a higher
temperature material to a lower temperature material
◉ How does the boiling point of water change with steam pressure?
Answer: The boiling point of water increases as steam pressure
increases
◉ latent heat Answer: Heat that causes a state change but doesn't
change the temperature
◉ sensible heat Answer: Heat that causes a temperature change
without a state change
◉ Conduction Answer: The direct transfer of heat from one
substance to another substance that it is touching.
◉ Convection Answer: The transfer of heat by the movement of a
fluid
◉ Radiation Answer: Energy that is radiated or transmitted in the
form of rays or waves or particles. Produced upon contact with
opaque objects
, ◉ What are examples of conduction, convection, and radiation in a
boiler? Answer: Heat radiates from combustion flames to the metal
surfaces of the boiler, the metal surfaces conduct heat from the hot
side to the cooler side where metal is covered by water or steam.
Heat moves within the steam/hot water via convection.
◉ Firetube boiler Answer: A boiler with tubes of combustion gases
passing through the water space.
◉ Watertube boiler Answer: A boiler in which water passes through
tubes surrounded by gases of combustion. It provides greater
horsepower, steam volume, and pressures.
◉ Low pressure steam heating boiler Answer: Steam is supplied at
pressures up to 15 psi
◉ Low Pressure Hot Water Heating Boiler Answer: Supplies hot
water at pressure up to 160 psi and a T less than 250°F
◉ Hot Water Supply Boiler Answer: For space heating at pressures
of not more than 160 psi and T under 210°F
◉ Power Hot Water Boiler Answer: Heats liquid to a p greater than
160 psi or a T greater than 250°F
