Refrigeration and air conditioning
Previous year question paper with solutions for Refrigeration and air conditioning
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- Explain the term “tonne of refrigeration”.
- Discuss the advantages of the dense air refrigeration system over an open air refrigeration system
- Sketh the T-s and p-h diagrams for the vapour compression cycles when the vapour after compression is dry saturated.
- What are the advantages of compound compression with intercooler over single state compression?
- Mention the function of each fluid in a three-fluid vapour absorption system.
- What is an Azeotrope? Give some examples to indicate its importance.
- Define the terms: Relative humidity and Dew point temperature.
- Show heating and humidification process on the skeleton psychometric chart.
- If one ton of ice at 0°C melts in one hour then what will be its equivalent in ton of refrigeration (take 1 TR = 210kJ/min)
- What is the effect of liquid sub cooling on work input in VCRS?
- COP of air refrigeration system is very low still it is used in aircraft cooling instead of VCRS. Why?
- Draw Temperature-Entropy diagram showing superheat horn.
- What is pressure balancing valve?
- How the freezing point of water is lowered?
- What is alignment circle?
- What is effective temperature?
- What role is being played by wet bulb temperature in air-conditioning?
- Give the classification of condenser used in refrigeration and air conditioning system.
- What do you understand by comfort air conditioning?
- What is the function of a fan in air conditioning?
- What is difference between boiling and evaporation?
- Draw vapour compression refrigeration cycle on T-S diagram for which super heat horn is zero
- Can there happen any rise in temperature during throttling process, how?
- What are advantages of SO2 as refrigerant?
- What is difference between flash intercooler and water intercooler?
- What is the working principle of thermoelectric refrigeration?
- What is significance of wet bulb depression?
- What is alignment circle?
- In sensible cooling of air what is the minimum temperature to which it can be cooled and why?
- List any three applications of cryogenic system.