Power Plant Questions and Answers – Flaws of Steam as a Working Fluid and Vapor Cycle Characteristics

This set of Power Plant Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Flaws of Steam as a Working Fluid and Vapor Cycle Characteristics”.

1. Addition of an infinitesimal amount of heat at the highest temperature is because ___________
a) to initiate reheating
b) to initiate regeneration
c) to initiate superheating
d) none of the mentioned
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2. High moisture content is involved during expansion of steam because ___________
a) to ensure uniform heating
b) to ensure uniform cooling
c) to obtain a higher temperature of heat addition
d) to obtain a lower temperature of heat addition
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3. What is the relation of the mean temperature of heat addition and cycle efficiency?
a) both are inversely proportional
b) both are directly proportional
c) both are independent of each other
d) none of the mentioned
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4. Temperature of heat rejection in a condenser can be lowered by using?
a) lubricant
b) oil
c) refrigerant
d) diesel
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5. The use of which of the following becomes necessary during expansion of steam?
a) reheat
b) regeneration
c) refrigeration
d) superheat
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6. Which is the drawback of the steam as a working substance in a power cycle?
a) in a vapour power cycle, maximum temperature which can be obtained with best available material is more than the critical temperature of water and requires large superheating
b) it allows only small amount of heat addition at the highest temperature
c) it requires reheat and reheater tubes are costly
d) all of the mentioned
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7. For maximum efficiency of vapour power cycle, what should be the critical temperature of working fluid?
a) the working fluid should have critical temperature as low as possible
b) the working fluid should have critical temperature as high as possible
c) the critical temperature does not affect the efficiency of the vapour power cycle
d) none of the mentioned
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8. What is the specific heat of the ideal working fluid used in vapour power cycle?
a) should be constant
b) should be large
c) should be small
d) none of the mentioned
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9. What is the importance of the freezing point of the working fluid in the vapour power cycle?
a) freezing point of working fluid should be below the room temperature
b) freezing point of working fluid should be above the room temperature
c) freezing point of working fluid should be equal to the room temperature
d) does not have any importance
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10. When two vapour cycles are coupled in series and heat rejected by one is absorbed by another, the cycle is called as?
a) Dual vapour cycle
b) Binary vapour cycle
c) Coupled vapour cycle
d) None of the mentioned
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11. The engines which are operating on gas power cycle are?
a) cyclic
b) non-cyclic
c) either cyclic or non-cyclic
d) none of the mentioned
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Sanfoundry Global Education & Learning Series – Power Plant Engineering.

To practice all areas of Power Plant Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.

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