150) In a jet engine, the air-fuel ratio is

30:1

40:1

50:1

60:1

Answer is:

60:1

Compressors Gas dynamics and Gas Turbines MCQ with Answers

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Related Compressors Gas dynamics and Gas Turbines MCQ with Answers

151) Which of the following bladings will give maximum pressure rise in a centrifugal compressor, assuming the same overall dimensions, blade inlet angle and rotational speeds ?

Forward curved blades

Backward curved blades

Radial blades

all of these

Answer is:

Forward curved blades

152) In an axial flow compressor, the ratio of pressure in theTOtor blades to the pressure rise in the compressor in one stage is known as

work factor

slip factor

degree of reaction

pressure coefficient

Answer is:

degree of reaction

153) In a two stage reciprocating compressor with intercooler, the amount of work saved with incomplete intercooling is __________ that in case of complete intercooling.

less than

more than

equal

none of these

Answer is:

less than

154) The free air delivery is the volume of air that can be delivered by a compressor freely.

Right

Wrong

Can't Say

None

Answer is:

Wrong

Explanation:

Free air delivery is the actual volume delivered by a compressor when reduced to the normal temperature and pressure conditions. The capacity of a compressor is generally given in terms of free air delivery.

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