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Compressors - Interview Questions and Answers

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46. A compressor at high altitude will draw
A. more power
B. less power
C. same power
D. more/less power depending on other factors
E. none of the above.
Explanation:
47. Volumetric efficiency of air compressors is of the order of
A. 20-30%
B. 40-50%
C. 60-70%
D. 70-90%
E. 90-100%.
Explanation:
48. The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is
A. less
B. more
C. same
D. more/less depending on compressor capacity
E. unpredictable.
Explanation:
49. An air compressor may be controlled by
A. throttle control (b) clearance control
B. blow-off control
C. any one of the above
D. none of the above.
E. opt 5
Explanation:
50. Rotary compressor is best suited for
A. large quantity of air at high pressure
B. small quantity of air at high pressure
C. small quantity of air at low pressure
D. large quantity of air at low pressure
E. any one of the above.
Explanation:
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