Steam and Gas Turbines Multiple Choice Questions on “Centrifugal Compressors Design Calculations”.
1. No of dimensions used in centrifugal compressors are ____________
a) 1
b) 2
c) 3
d) 4
Answer: c
Clarification: 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
Answer: a
Clarification: 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
Answer: c
Clarification: 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
Answer: a
Clarification: 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
Answer: b
Clarification: 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
Answer: c
Clarification: Under some circumstances centrifugal compressor is reversible process.
7. In centrifugal compressor flow is ____________
a) radial
b) Perpendicular
c) radial & Perpendicular
d) none of the mentioned
Answer: a
Clarification: In centrifugal compressor flow is radial.
8. In centrifugal compressor centrifugal energy present in the gas is utilized to ___________
a) compress
b) increase temperature
c) radial
d) none of the mentioned
Answer: a
Clarification: 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
Answer: b
Clarification: 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
Answer: a
Clarification: Rotating speed of centrifugal compressor is inverse function of diameter to be maintained.
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