Q.1
Why multi-stage or compound VCR with intercooler is used?
  • a) To improve C.O.P.
  • b) To decrease the refrigeration effect
  • c) To increase work
  • d) To increase leakage loss
Q.2
What is the purpose of using intercooler?
  • a) To increase the cost of the compressor
  • b) To reduce the volumetric efficiency
  • c) To re-heat superheated refrigerant
  • d) To cool the superheated refrigerant
Q.3
What does process 1-2 and 3-4 represent?
  • a) Evaporation
  • b) Compression
  • c) Condensation
  • d) Expansion
Q.4
What does process 2-3 represent?
Questionrefrigeration-air-conditioning-questions-answers4.jpg
  • a) Evaporation
  • b) Compression
  • c) Condensation
  • d) Intercooling
Q.5
What do PC and PE represent?
Questionrefrigeration-air-conditioning-questions-answers5.jpg
  • a) Evaporator and expansion pressure
  • b) Compression and expansion pressure
  • c) Condenser and evaporator pressure
  • d) Intercooling pressure
Q.6
What is the relation between mmand m3?
Questionrefrigeration-air-conditioning-questions-answers6.jpg
  • a) m3 = m1 + m2
  • b) m3 = m1 – m2
  • c) m3 = m2 – m1
  • d) m3 = m1 / m2
Q.7
What is the ratio of the mass of refrigerant flowing through condenser and mass of refrigerant flowing through the evaporator, i.e., m2 / m1?
  • a) h2 – h6 / h3 – hf5
  • b) h1 – h6 / h1 – hf5
  • c) h2 – h3 / h1 – hf5
  • d) h2 – h4 / h1 – hf5
Q.8
What is the value of C.O.P. for the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers8.jpg
  • a) m1 (h1 – hf5) / m1 (h2 – h1) – m2 (h4 – h3)
  • b) m1 (h1 – hf5) / m1 (h2 – h1) + m2 (h4 – h3)
  • c) m1 (h1 – hf5) / m1 (h2 – h1)
  • d) m1 (h1 – hf5) / m2 (h4 – h3)
Q.9
Why is such a type of arrangement used in ammonia plants?
  • a) High latent heat of vaporization
  • b) Low latent heat of vaporization
  • c) Medium latent heat of vaporization
  • d) High toxicity
0 h : 0 m : 1 s