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Prime Movers Final Exam Practice Questions and Answers

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Prime Movers Final Exam Practice Questions and Answers Despite their size and complexity, steam plants are widely used because: a) of their low emissions of pollutants b) they are easily located in an urban environment c) they can be run by untrained personnel d) they require minimal amounts ...

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  • November 11, 2024
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Prime Movers Final Exam Practice

Questions and Answers


Despite their size and complexity, steam plants are widely used because:




a) of their low emissions of pollutants


b) they are easily located in an urban environment


c) they can be run by untrained personnel


d) they require minimal amounts of water


e) they can burn solid fuels such as coal and wood. - ANSWER✔✔-E


Connecting Rods on a steam engine:




a) convert reciprocating motion to rotary motion


b) are used to move the slide valve


c) are only needed on vertical engines


d) are used to connect the piston to the slide valve


e) connects the inlet valve to the discharge valve - ANSWER✔✔-A


A "heat engine" is an operating cycle that uses a working fluid to convert:

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a) thermal energy to chemical energy


b) chemical energy to mechanical energy


c) thermal energy to electrical energy


d) mechanical energy to electrical energy


e) thermal energy to mechanical energy - ANSWER✔✔-E


A single device which converts a natural source of energy to mechanical motion is a/an:




a) prime mover


b) heat engine


c) electric motor


d) steam plant


e) alternator - ANSWER✔✔-A


A gasoline engine is a "heat engine". What is its working fluid?




a) glycol


b) gasoline


c) air


d) glycol and water

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e) gasoline and air - ANSWER✔✔-E


What is the main advantage of using the expansive properties of steam?




a) reliability


b) speed of response


c) economy


d) lower steam pressures can be used


e) superheated steam can be used - ANSWER✔✔-C


Thinking of a steam engine and its construction, what does "eccentric" mean?




a) strange


b) out-of-center


c) economical


d) redundant


e) bi-directional - ANSWER✔✔-B


On a steam engine, what is the purpose of a "flywheel"




1. it prevents an over speed condition




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2. It dampens speed fluctuations


3. It allows the direction of rotation to be changed


4. It carries the engine over dead center.




a) 1, 2


b) 1, 3


c) 1, 4


d) 2, 3


e) 2, 4 - ANSWER✔✔-E


Advantages of a steam engine include:




1. It is possible to change the direction of rotation without the use of gearing


2. they have a high rotational speed


3. they are simple and rugged


4. they have a slow rotational speed without the need for reduction gearing




a) 1, 2


b) 3, 4


c) 1, 2, 3

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