# Steam Turbines Questions and Answers – Centrifugal Compressors Design Calculations

This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Centrifugal Compressors Design Calculations”.

1. No of dimensions used in centrifugal compressors are ____________
a) 1
b) 2
c) 3
d) 4

Explanation: Centrifugal compressors use three dimensions. They are
Mass
Length
Time.

2. Flow in a centrifugal compressor is inversely proportional to _______
a) Time
b) Square of time
c) Cube of time
d) None of the mentioned

Explanation: Flow in centrifugal compressor is inversely proportional to the time.

3. Head in centrifugal compressor is __________ to square of the time.
a) directly proportional
b) equal to
c) inversly proportional
d) none of the mentioned

Explanation: Head in centrifugal compressor is inversely proportional to square of the time.

4. Continuity equation can be applied to centrifugal compressor.
a) True
b) False

Explanation: Continuity equation also known as conservation of mass can be applicable to centrifugal compressor.

5. Navier stokes equation is conservation of ____________
a) Mass
b) Momentum
c) Mass & Momentum
d) None of the mentioned

Explanation: Navier stokes equation is conservation of momentum.

6. Centrifugal compressor is an __________
a) irreversible process
b) quasi static process
c) reversible process
d) none of the mentioned

Explanation: Under some circumstances centrifugal compressor is reversible process.

7. In centrifugal compressor flow is ____________
b) Perpendicular
d) none of the mentioned

Explanation: In centrifugal compressor flow is radial.

8. In centrifugal compressor centrifugal energy present in the gas is utilized to ___________
a) compress
b) increase temperature
d) none of the mentioned

Explanation: In centrifugal compressor centrifugal energy present in the gas is utilized to do work.

9. Centrifugal compressor delivers ____________ flow capacity.
a) high
b) low
c) medium
d) none of the mentioned

Explanation: Centrifugal compressor delivers low flow capacity.

10. Rotating speed of centrifugal compressor is __________ function of diameter to be maintained.
a) inverse
b) direct
c) point
d) none of the mentioned

Explanation: Rotating speed of centrifugal compressor is inverse function of diameter to be maintained.

Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.

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