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Compressors - Interview Questions and Answers

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101. The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is called
A. pressure ratio
B. pressure coefficient
C. degree of reaction
D. slip factor
E. stage factor.
Explanation:
102. Rotary compressors are suitable for
A. large discharge at high pressure
B. low discharge at high pressure
C. large discharge at low pressure
D. low discharge at low pressure
E. there is no such limitation.
Explanation:
103. Maximum delivery pressure is a rotary air compressor is of the order of
A. 6 kg/cm2
B. 10 kg/cm2
C. 16 kg/cm2
D. 25 kg/cm2
E. 40 kg/cm2.
Explanation:
104. The pressure ratio of an ideal vaned compressor with increase in mass flow rate
A. increases
B. decreases
C. remains constant
D. first decreases and then increases
E. unpredictable.
Explanation:
105. Gas turbine works on
A. Brayton or Atkinson cycle
B. Carnot cycle
C. Rankine cycle
D. Erricsson cycle
E. Joule cycle.
Explanation:
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