# Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines

Exercise : Compressors, Gas Dynamics and Gas Turbines - Section 2
1.
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 = (p1p3)1/2
D1/D2 = (p1/p3)1/4
D1/D2 = (p1p3)1/4
D1/D2 = (p3/p1)1/4
Explanation:
No answer description is available. Let's discuss.

2.
Reheating in a gas turbine
increases the thermal efficiency
increases the compressor work
increases the turbine work
decreases the thermal efficiency
Explanation:
No answer description is available. Let's discuss.

3.
In a single stage, single acting reciprocating air compressor, without clearance, the workdone on the air during isentropic compression is __________ the heat required to raise the temperature of air from T1 to T2 at a constant pressure.
equal to
less than
greater than
Explanation:
No answer description is available. Let's discuss.

4.
Workdone by an air compressor __________ upon the way in which the air is compressed.
depends
does not depend