CITY OF OMAHA 3RD GRADE N.A.P.E.
STATIONARY ENGINEERS TEST EXAM
2025 QUESTIONS AND ANSWERS
How can you lose your license? - ANS Drinking on the job / sleeping on the job / negligence /
unsafe work / failing to renew your license annually / signing a falsified licensing application for
someone
What must you do if you change jobs? - ANS You must notify city hall if you change jobs,
change your address or if you retire
Why should you do rounds? - ANS You do rounds so that you can find and correct problems
to prevent break downs. Keeping permanent records will make it easier to forecast most
breakdowns because you will get to know your equipment.
What is a steam Boiler? - ANS A steam boiler is a closed vessel PARTIALLY FILLED with water,
under pressure, that transforms water into steam with the application of heat.
What are requirements of a good boiler? - ANS 1. simple
2. designed to accommodate expansion and contraction
3. adequate steam and water space
4. efficient
5. responsive to demands
6. accessible for cleaning and repair
7. safe
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, Name and describe three types of heat transfer used in boiler operation. - ANS RADIANT
HEAT-is heat radiated from a hot to cold body and depends on the temperature difference and
the color of the body that receives the heat. The heat from the sun reaches us by means of
radiation.
CONDUCTION HEAT-is heat that passes from the gas to the tube by physical contact. The heat
passes from molecule of metal to molecule of metal with no displacement of the molecules.
CONVECTION HEAT-is heat transmitted from a hot to cold body by movement of the conveying
substance.
What is a combustion chamber? - ANS The area of a boiler where the burning of fuel occurs
What is an internally fired boiler and name 4 types. - ANS Internally fired boilers are those in
which the grate and combustion chamber are enclosed within the boiler shell.
Scotch Marine
Cast iron package
Steam locomotive
Vertical fire tube
What is an externally fired boiler and name 4 types. - ANS Externally fired boiler is a boiler in
which the setting, including furnace and grates are separate and distinct from the boiler shell.
Horizontal return tube set on brick
Heine
Cast iron set on brick
Sterling water tube
2 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
STATIONARY ENGINEERS TEST EXAM
2025 QUESTIONS AND ANSWERS
How can you lose your license? - ANS Drinking on the job / sleeping on the job / negligence /
unsafe work / failing to renew your license annually / signing a falsified licensing application for
someone
What must you do if you change jobs? - ANS You must notify city hall if you change jobs,
change your address or if you retire
Why should you do rounds? - ANS You do rounds so that you can find and correct problems
to prevent break downs. Keeping permanent records will make it easier to forecast most
breakdowns because you will get to know your equipment.
What is a steam Boiler? - ANS A steam boiler is a closed vessel PARTIALLY FILLED with water,
under pressure, that transforms water into steam with the application of heat.
What are requirements of a good boiler? - ANS 1. simple
2. designed to accommodate expansion and contraction
3. adequate steam and water space
4. efficient
5. responsive to demands
6. accessible for cleaning and repair
7. safe
1 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
, Name and describe three types of heat transfer used in boiler operation. - ANS RADIANT
HEAT-is heat radiated from a hot to cold body and depends on the temperature difference and
the color of the body that receives the heat. The heat from the sun reaches us by means of
radiation.
CONDUCTION HEAT-is heat that passes from the gas to the tube by physical contact. The heat
passes from molecule of metal to molecule of metal with no displacement of the molecules.
CONVECTION HEAT-is heat transmitted from a hot to cold body by movement of the conveying
substance.
What is a combustion chamber? - ANS The area of a boiler where the burning of fuel occurs
What is an internally fired boiler and name 4 types. - ANS Internally fired boilers are those in
which the grate and combustion chamber are enclosed within the boiler shell.
Scotch Marine
Cast iron package
Steam locomotive
Vertical fire tube
What is an externally fired boiler and name 4 types. - ANS Externally fired boiler is a boiler in
which the setting, including furnace and grates are separate and distinct from the boiler shell.
Horizontal return tube set on brick
Heine
Cast iron set on brick
Sterling water tube
2 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
