- (A) compressor efficiency
- (B) isentropic efficiency
- (C) Euler’s efficiency
- (D) pressure coefficient
- (E) pressure ratio
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- (A) slip factor
- (B) velocity factor
- (C) velocity coefficient
- (D) blade effectiveness
- (A) 2 kg/cm2
- (B) 6 kg/cm2
- (C) 10 kg/cm2
- (D) 14.7 kg/cm2
- (E) none of the above
- (A) better lubrication is possible advantages of multistage
- (B) more loss of air due to leakage past the cylinder
- (C) mechanical balance is better
- (D) air can be cooled perfectly in between
- (E) more uniform torque, light cylinder and saving in work
- (A) inlet losses
- (B) impeller channel losses
- (C) diffuser losses
- (D) all of the above
- (E) none of the above
- (A) increase
- (B) decrease
- (C) remain unaffected
- (D) other factors control it
- (E) unpredictable
- (A) isentropic compression
- (B) isothermal compression
- (C) polytropic compression
- (D) any one of the above
- (E) none of the above
- (A) 0.1%
- (B) 0.5%
- (C) 1%
- (D) 5%
- (E) 10%.
- (A) work done in first stage should be more
- (B) work done in subsequent stages should increase
- (C) work done in subsequent stages should decrease
- (D) work done in all stages should be equal
- (E) work done in any stage is no criterion for minimum work but depends on other factors
- (A) less power requirement
- (B) better mechanical balance
- (C) less loss of air due to leakage past the cylinder
- (D) more effective lubrication
- (E) lower volumetric efficiency
