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Compressors - Interview Questions and Answers

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51. Reciprocating air 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:
52. Euler's equation is applicable for
A. centrifugal compressor
B. axial compressor
C. pumps
D. all of the above
E. none of the above.
Explanation:
53. Volumetric efficiency of a compressor without clearance volume
A. increases with increase in compression ratio
B. decreases with increase in compression ratio
C. is not dependent upon compressin ratio
D. may increase/decrease depending on compressor capacity
E. unpredictable.
Explanation:
54. Clearance volume in actual reciprocating compressors is essential
A. to accommodate Valves in the cylinder head
B. to provide cushioning effect
C. to attain high volumetric efficiency
D. to avoid mechanical bang of piston with cylinder head
E. to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head.
Explanation:
55. The thrust on the rotor in a centrifugal compressor is produced by
A. radial component
B. axial component
C. tangential component
D. resultant component
E. opt 5
Explanation:
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