Applied Thermodynamics (3161910) MCQs

MCQs of Part-II Centrifugal Compressors

Showing 21 to 24 out of 24 Questions
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21.

Which of the following is true for a centrifugal compressor?

(a)

Rotation of impeller compresses the air
(b)

Diffuser converts part of KE into internal energy
(c)

Typical pressure ratio is around 1.4 to 1
(d)

All of the mentioned
Answer:

Option (d)

22.

A back flow from discharge to suction in compressor is called as __________.

(a)

pitching
(b)

yawning
(c)

surging
(d)

one of the mentioned
Answer:

Option (c)

23.

Surging produces _______ vibrations.

(a)

heavy
(b)

little
(c)

medium range
(d)

none of the mentioned
Answer:

Option (a)

24.

The criterion of the thermodynamic efficiency for centrifugal compressor is

(a)

Isentropic compression
(b)

Isothermal compression
(c)

Polytropic compression
(d)

None of the above
Answer:

Option (a)

Showing 21 to 24 out of 24 Questions
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