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
What is the value of swept volume?
  • a) 188.49
  • b) 94.2477
  • c) 47.1238
  • d) 471.23
Q.8
What is the value of the clearance factor?
  • a) 0.00465
  • b) 0.0465
  • c) 4.029
  • d) 0.2481
Q.9
What is the value of volumetric efficiency?
  • a) 1.289
  • b) 0.5278
  • c) 1.894
  • d) 0.775
Q.10
The main disadvantage of centrifugal compressors is surging.
  • a) False
  • b) True
0 h : 0 m : 1 s