Turbo Machines Multiple Choice Questions & Answers Pdf - 1

Question: 1

An ideal fluid for vapour turbine cycle should have

(A) low critical temperature with low pressure

(B) low critical temperature with high pressure

(C) high critical temperature with high pressure

(D) high critical temperature with low pressure

Ans: D

high critical temperature with low pressure

Question: 2

As there is plenty of time for heat transfer across the walls, the flow in long pipes at low velocities attains

(A) polytropic conditions

(B) isothermal conditions

(C) adiabatic conditions

(D) isentropic conditions

Ans: B

isothermal conditions

Question: 3

Greater the difference between jet velocity and aeroplane velocity

(A) lesser, the propulsive efficiency

(B) unaffected is the propulsive efficiency

(C) greater the propulsive efficiency

(D) none of the above

Ans: A

lesser, the propulsive efficiency

Question: 4

De Laval turbine is used for applications requiring

(A) low power, high speed

(B) low power, low speed

(C) high power, high speed

(D) high power, low speed

Ans: A

low power, high speed

Question: 5

Maximum delivery pressure in case of rotary compressors is usually restricted to

(A) 2 atmosphere

(B) 5 atmosphere

(C) 8 atmosphere

(D) 10 atmosphere

Ans: D

10 atmosphere

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