Engineering :: Thermodynamics

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281.

In case of centrifugal compressors, the phenomenon of air stream not able to follow the blade contour of an axial compressor is known as

282.

In centrifugal compressors, the ratio of outlet whirl velocity to blade velocity at outlet is known as

283.

Which of the following is not a positive displacement compressor?

A.	Centrifugal compressor?	B.	Single stage reciprocating compressor
C.	Double acting reciprocating compressor	D.	Roots blower
E.	Vane type compressor

284.

The ratio of enthalpy rise in rotor of a centrifugal compressor to the enthalpy rise in stage is called

285.

In case of axial flow compressors for minimum fluid driction and blade tip clearance losses, the blades of an axial flow compressor are disigned for

286.

In axial flow compressors, the phenomenon of stalling of blades occurs when

A.	Blades vibrate violently	B.	Blades fail due to creep
C.	Air stream is not able to follow the blade contour	D.	Air stream blocks the passage
E.	Air stream flows with sonic velocity

287.

In case of centrifugal compressors the phenomenon of unsteady, periodic and reversed flow is known as

288.

Which one of the following is an indirect reaction device?

289.

Which of the following does not use ambient air for propulsion?

290.

Which of the engine is used for fighter bombers?