Q.1
##### What is the work done during an isothermal compression?
• a) 2.3 mRT1 ln (p2 / p1)
• b) 2.3 mRP1 ln (p2 / p1)
• c) 2.3 mRT1 ln (p1 / p2)
• d) mRT1 ln (p2 / p1)
Q.2
##### What is the work done during a polytropic compression?
• a) [n / (n – 1)] mR (T2 – T1)
• b) [n / (n + 1)] mR (T2 – T1)
• c) [n / (n – 1)] mR (T2 + T1)
• d) [n / (n + 1)] mR (T2 + T1)
Q.3
##### What is the work done during an isentropic compression?
• a) [n / (n – 1)] mR (T2 – T1)
• b) [n / (n + 1)] mR (T2 – T1)
• c) [n / (n – 1)] mR (T2 + T1)
• d) [n / (n + 1)] mR (T2 + T1)
Q.4
##### What is the expression for optimum intercooler or intermediate pressure P2 if the cooling ratio is fixed in a compound compression refrigeration system with intercooling?
• a) P2 = P1 / P3
• b) P2 = P3 / P1
• c) P2 = √P1 x P3
• d) P2 = ∛P1 x P3
Q.5
##### Where is the centrifugal compressor mostly suitable?
• a) Small displacements and low condensing pressures
• b) Small displacements and high condensing pressures
• c) Large displacements and low condensing pressures
• d) Large displacements and high condensing pressures
Q.6
##### Where is the reciprocating compressor mostly suitable?
• a) Small displacements and low condensing pressures
• b) Small displacements and high condensing pressures
• c) Large displacements and low condensing pressures
• d) Large displacements and high condensing pressures
Q.7
• a) 188.49
• b) 94.2477
• c) 47.1238
• d) 471.23
Q.8
• a) 0.00465
• b) 0.0465
• c) 4.029
• d) 0.2481
Q.9
• a) 1.289
• b) 0.5278
• c) 1.894
• d) 0.775
Q.10
• a) False
• b) True