Important Questions of Refrigeration & Air Conditioning

Hello Everyone,This is Vivek Sharma
and in this article you are going to find some Important Questions of Refrigeration & Air Conditioning. Refrigeration & Air Conditioning is a main subject of Mechanical Engineering & Civil Engineering students.

I hope you will find these question useful πŸ™‚

Here are the Questions

  • Enumerate different ways of producing refrigeration.
  • What is the standard rating of a refrigeration machine?
  • What is the effect of sub-cooling on the performance of the vapour compression refrigeration system?
  • State elements of the refrigeration system.
  • State the advantages of central system over the unitary system of air conditioning.
  • Write the properties of carbon dioxide refrigerant.
  • What is the function of ducts?
  • How air conditioning systems are classified?
  • Explain briefly an air refrigerator working on a reversed Carnot cycle. Drive an expression for its C.O.P.
  • Give the comparison between a vapour compression system and a vapour absorption system.
  • State the functions of the following parts of a simple vapour compression system:
    • Compressor
    • Condenser
    • Expansion valve
    • Evaporator
  • Write the short note on “pressure-enthalpy (p-h) chart.” Show the simple vapour compression cycle on p-h charts.
  • What is the advantage of using an expansion valve instead of an expander in a vapour compression refrigeration cycle?
  • A refrigerator operating on standard vapour compression cycle has a coefficient of performance of 6.5 and is driven by a 50 kW compressor. The enthalpies of saturated liquid and vapour refrigerant at the operating condensing temperature of 35 Degree C are 62.55 kJ/kg and 201.45 kJ/kg respectively.The saturated refrigerant vapour leaving evaporator has of 187.53 kJ/kg. Find the refrigerant.
  • Discuss the effect of the following on the performance of a vapour compression system:
    • Suction Pressure
    • Delivery Pressure
    • Superheating

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