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Engineering
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ME Set-3
Pressure Vessels
64

Pressure Vessels and Engines MCQ with Answers

64) As the value of index ′«′ is decreased, the volumetric efficiency will

increase

decrease

remain unaffected

may increase/decrease depending on compressor clearance

Answer is:

decrease

Pressure Vessels and Engines MCQ with Answers

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Related Pressure Vessels and Engines MCQ with Answers

65) The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called

slip factor

velocity factor

velocity coefficient

blade effectiveness

Answer is:

slip factor

66) Losses in a centrifugal compressor are due to

inlet losses

impeller channel losses

diffuser losses

all of the above

Answer is:

all of the above

67) The volumetric efficiency of a compressor falls roughly as follows for every 5°C increase in atmospheric temperature

0.10%

0.50%

1%

5%

Answer is:

0.01

68) The indicated work per unit mass of air delivered is

directly proportional to clearance volume

greatly affected by clearance volume

not affected by clearance volume

inversely proportional to clearance volume

Answer is:

not affected by clearance volume

Pressure Vessels and Engines MCQ with Answers

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