51) 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

52) Reheating in a gas turbine

53) 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 c

54) Workdone by an air compressor __________ upon the way in which the air is compressed.

55) In a compressor, work is done on the piston during suction of air and work is done by the piston during compression as well as delivery of air.