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Compressors - Interview Questions and Answers

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116. Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on
A. mass flow rate
B. pressure ratio
C. change in load
D. stagnation pressure at the outlet
E. all of the above.
Explanation:
117. The air-fuel ratio in gas turbines is of the order of
A. 7 : 1
B. 15 : 1
C. 30 : 1
D. 40 : 1
E. 50: 1.
Explanation:
118. The ratio of specific weigh/h.p. of gas turbine and I.C engines may be typically of the order of
A. 1 : 1
B. 2 : 1
C. 4 : 1
D. 1:2
E. 1 : 6.
Explanation:
119. As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio
A. increases
B. decreases
C. remains same
D. first increases and then decreases
E. first decreases and then increases.
Explanation:
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