Question 31. Intercooling in multi-stage compressors is done

Question 32. For a two stage reciprocating compressor, compression from p1 to p3 is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p2 is given by

Question 33. The ratio of workdone per cycle to the stroke volume of the compressor is known as

Question 34. The clearance volume in the compressor is kept minimum because it effects on volumetric efficiency.

Question 35. The inlet pressure is always __________ the discharge pressure.

Question 36. An aftercooler is used to

Question 37. The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as

Question 38. The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called

Question 39. If p1, is the pressure of air entering the L.P. cylinder and p2 is the pressure of air leaving the L.P. cylinder (or intercooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D1 = Dia. of L.P. cylinder, and D2 = Dia. of H.P. cylinder)

Question 40. Which of the following statement is wrong?