GRADE 4 STATIONARY ENGINEER
LICENSE PRACTICE EXAM 2025
QUESTIONS AND ANSWERS
What is a boiler - ANS a closed metal container (pressure vessel) which water is heated to
produce steam or heated water
what is steam - ANS the vapor that forms when water is heated to its boiling point
when did the greatest impact of the use of steam power occur - ANS during the industrial
revolution 18th and early 19th century
who invented the steam engine and when - ANS James Watt of Scotland in 1736
How is steam produced - ANS water is heated to 212 degrees at atmospheric pressure
state the first law of thermodynamics - ANS energy cannot be created or destroyed but may
be changed from one form to another
state the second law of thermodynamics - ANS heat always flows from a material at a high
temperature to a material at a low temperature
COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 1
, what is sensible heat - ANS heat that causes a temperature change that can be measured
with a thermometer or sensed by a person
what is latent heat - ANS head identified by a change of state and no temperature change
what is a BTU - ANS the amount of energy required to raise the temperature of 1 lb of water
1 degree fahrenheit
name 3 ways heat is transferred - ANS conduction, convection, and radiation
How is heat generated in a boiler - ANS by the combustion of a fuel
name the 3 conditions of combustion - ANS perfect, complete. or incomplete
name the 3 classifications of combustion air - ANS primary air, secondary air, and excess air
describe the 4 systems all steam boilers operate using - ANS feedwater system, fuel system,
draft system, and steam system
what does the feedwater system do? - ANS supplies the proper amount of water to the
boiler
what does the draft system regulate? - ANS the flow of air to and from the boiler
what does the fuel system do - ANS provides fuel for combustion to generate the necessary
heat in the boiler
COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 2
LICENSE PRACTICE EXAM 2025
QUESTIONS AND ANSWERS
What is a boiler - ANS a closed metal container (pressure vessel) which water is heated to
produce steam or heated water
what is steam - ANS the vapor that forms when water is heated to its boiling point
when did the greatest impact of the use of steam power occur - ANS during the industrial
revolution 18th and early 19th century
who invented the steam engine and when - ANS James Watt of Scotland in 1736
How is steam produced - ANS water is heated to 212 degrees at atmospheric pressure
state the first law of thermodynamics - ANS energy cannot be created or destroyed but may
be changed from one form to another
state the second law of thermodynamics - ANS heat always flows from a material at a high
temperature to a material at a low temperature
COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 1
, what is sensible heat - ANS heat that causes a temperature change that can be measured
with a thermometer or sensed by a person
what is latent heat - ANS head identified by a change of state and no temperature change
what is a BTU - ANS the amount of energy required to raise the temperature of 1 lb of water
1 degree fahrenheit
name 3 ways heat is transferred - ANS conduction, convection, and radiation
How is heat generated in a boiler - ANS by the combustion of a fuel
name the 3 conditions of combustion - ANS perfect, complete. or incomplete
name the 3 classifications of combustion air - ANS primary air, secondary air, and excess air
describe the 4 systems all steam boilers operate using - ANS feedwater system, fuel system,
draft system, and steam system
what does the feedwater system do? - ANS supplies the proper amount of water to the
boiler
what does the draft system regulate? - ANS the flow of air to and from the boiler
what does the fuel system do - ANS provides fuel for combustion to generate the necessary
heat in the boiler
COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 2
