3rd class boiler exam with accurate detailed answers ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A fusible plug is primarily used to: - correct answer✔✔Indicate a low water condition in the
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boiler
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An injector: - correct answer✔✔Has a high thermal efficiency
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A return trap, will - correct answer✔✔Only feed condensate to a boiler
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Water will boil at 212"F, when the pressure corresponding to its boiling point is
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
approximately? - correct answer✔✔14.7 pounds per square inch absolute ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
The maximum rotative speed of an engine is limited by which one of these problems? -
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔Fly Wheel ||\\//|| ||\\//||
Once the ignition temperature is reached, the completeness of combustion is dependent
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
upon? - correct answer✔✔The rate of oxygen supply ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Insulating materials should be? - correct answer✔✔Non-Conductive ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
As the temperature of water increases, the pressure head that can be produced with a
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pump: - correct answer✔✔Decreases ||\\//|| ||\\//|| ||\\//||
Internal cleaning is required before a new boiler is placed into service: - correct ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔To remove protective coating, grease, and other foreign materials incidental to ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
erection
, The purpose of the large ball or chamber at the bottom of most water columns is to: -
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔Collect sediment ||\\//|| ||\\//||
A non-return trap should always be located? - correct answer✔✔Below the coil or line to
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
which it is connected ||\\//|| ||\\//|| ||\\//||
When a boiler is in service, the proper time to blow down is: - correct answer✔✔At a time
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
when the steam generation is lowest ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A throttling governor will control the speed of a D-Slide valve engine by: - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔Varying the mean effective pressure ||\\//|| ||\\//|| ||\\//|| ||\\//||
Which of the following stoker designs can satisfactorily burn coal with the widest range of
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properties. - correct answer✔✔Overfeed Stokers ||\\//|| ||\\//|| ||\\//|| ||\\//||
The discharge valve of an expansion trap is opened by the: - correct answer✔✔Cooling
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
effect of the water ||\\//|| ||\\//|| ||\\//||
Where the exhaust steam is badly contaminated, it is good practice to use a heater of the: -
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correct answer✔✔Closed Type ||\\//|| ||\\//||
In the Heine Longitudinal drum boiler, the mud drum is: - correct answer✔✔Inside the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
steam drum ||\\//||
The water gage glass connections shall be not less than: - correct answer✔✔1/2 inch pipe
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size
The movement of water and steam in the tube of Copes Feedwater Regulator is: - correct
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answer✔✔Slow
A fusible plug is primarily used to: - correct answer✔✔Indicate a low water condition in the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
boiler
||\\//||
An injector: - correct answer✔✔Has a high thermal efficiency
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A return trap, will - correct answer✔✔Only feed condensate to a boiler
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Water will boil at 212"F, when the pressure corresponding to its boiling point is
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
approximately? - correct answer✔✔14.7 pounds per square inch absolute ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
The maximum rotative speed of an engine is limited by which one of these problems? -
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔Fly Wheel ||\\//|| ||\\//||
Once the ignition temperature is reached, the completeness of combustion is dependent
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
upon? - correct answer✔✔The rate of oxygen supply ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Insulating materials should be? - correct answer✔✔Non-Conductive ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
As the temperature of water increases, the pressure head that can be produced with a
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
pump: - correct answer✔✔Decreases ||\\//|| ||\\//|| ||\\//||
Internal cleaning is required before a new boiler is placed into service: - correct ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔To remove protective coating, grease, and other foreign materials incidental to ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
erection
, The purpose of the large ball or chamber at the bottom of most water columns is to: -
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔Collect sediment ||\\//|| ||\\//||
A non-return trap should always be located? - correct answer✔✔Below the coil or line to
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
which it is connected ||\\//|| ||\\//|| ||\\//||
When a boiler is in service, the proper time to blow down is: - correct answer✔✔At a time
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
when the steam generation is lowest ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A throttling governor will control the speed of a D-Slide valve engine by: - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔Varying the mean effective pressure ||\\//|| ||\\//|| ||\\//|| ||\\//||
Which of the following stoker designs can satisfactorily burn coal with the widest range of
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
properties. - correct answer✔✔Overfeed Stokers ||\\//|| ||\\//|| ||\\//|| ||\\//||
The discharge valve of an expansion trap is opened by the: - correct answer✔✔Cooling
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
effect of the water ||\\//|| ||\\//|| ||\\//||
Where the exhaust steam is badly contaminated, it is good practice to use a heater of the: -
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔Closed Type ||\\//|| ||\\//||
In the Heine Longitudinal drum boiler, the mud drum is: - correct answer✔✔Inside the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
steam drum ||\\//||
The water gage glass connections shall be not less than: - correct answer✔✔1/2 inch pipe
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
size
The movement of water and steam in the tube of Copes Feedwater Regulator is: - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔Slow
