Axial flow type
Centrifugal type
None of these

## Compressors, Gas Turbines and Jet Engines If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by

1 + k - k (p₂/p₁) n-1/n
1 + k - k (p₂/p₁)1/n
1 - k + k (p₁/p₂) n- 1/n
1 - k + k (p₁/p₂)1/n

## Compressors, Gas Turbines and Jet Engines Work ratio of a gas turbine may be improved by

Increasing the compression work
Decreasing the compression work
Increasing the turbine work
Both (A) and (C) above

## Compressors, Gas Turbines and Jet Engines If p₁ is the pressure of air entering the L.P, cylinder and p₃ is the pressure of air leaving the H.P. cylinder, then the ratio of cylinder diameters for a single acting, two stage reciprocating compressor with complete intercooling is given by

D₁/D₂ = (p₁ p₃)1/2
D₁/D₂ = (p₁/p₃)1/4
D₁/D₂ = (p₁ p₃)1/4
D₁/D₂ = (p₃/p₁)1/4

## Compressors, Gas Turbines and Jet Engines The efficiency of jet engine is

Higher at high altitudes
Same at all altitudes
Higher at high speed
Lower at low speed

## Compressors, Gas Turbines and Jet Engines The volume of air delivered by the compressor is called

None of the listed here
Free air delivery
Swept volume
Compressor capacity