1000+ Turbomachinery Interview Questions and Answers - 2

Question: 6

The diverging portion of the nozzle acts as a diffuser for

(A) both the subsonic as well as supersonic flow

(B) the subsonic flow

(C) the supersonic flow

(D) none of the above

Ans: B

the subsonic flow

Question: 7

In a gas turbine cycle, regenerator is used to

(A) heat exhaust gases released from low pressure turbine

(B) heat air supplied to combustion chamber

(C) heat fuel supplied to combustion chamber

(D) heat the gases coming out of combustion chamber

Ans: B

heat air supplied to combustion chamber

Question: 8

The normal shock wave in compressible flow in analogous to

(A) hydraulic jump in channel flow

(B) hydraulic bore in tidal rivers

(C) surges in open channel

(D) vortex formation in centrifugal pump

Ans: A

hydraulic jump in channel flow

Question: 9

In a two stage gas turbine plant, reheating after first stage

(A) does not affect thermal efficiency

(B) increases thermal efficiency

(C) decreases thermal efficiency

(D) none of the above

Ans: C

decreases thermal efficiency

Question: 10

The flow of two sides of a normal shock wave is

(A) sonic

(B) supersonic

(C) supersonic on one side and subsonic on the other side

(D) subsonic

Ans: C

supersonic on one side and subsonic on the other side

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