In centrifugal compressors, there is a tendency of increasing surge when |
1. The number of diffuser vanes is less than the number of impeller vanes |
2. The number of diffuser vanes is greater than the number of impeller vanes |
3. The number of diffuser vanes is equal to the number of impeller vanes |
4. Mass flow is greatly in excess of that corresponding to Lbs design mass flow |
A) 1 and 4
B) 2 alone
C) 3 and 4
D) 2 and 1
Correct Answer: D
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