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Refrigeration and Air Conditioning Test 1
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  • Question 1/5
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    The enthalpy of working fluid at the condenser inlet in a VCRS was found to be 300 kJ/kg and that at evaporator outlet was 240 kJ/kg. If the enthalpy at exit of condenser was 150 kJ/kg, then calculate the COP of this system.
  • Question 2/5
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    When the max outdoor temperature is 34°C, then the condensing temperature is 48°C and the heat rejected is 30 kW, what is the condensing temperature (in °C) when the load is reduced to 10 kW and outdoor temperature is 18°C?
  • Question 3/5
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    Moist air exists at the pressure of 1.01 bar. The partial pressure and saturation pressure of water vapor are 0.01 bar and 0.02 bar respectively. What are relative humidity and humidity ratio of moist air, respectively?
  • Question 4/5
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    A container of water is placed in room of 80 m3 volume. The initial temperature and relative humidity of room is 10°C and 50 % respectively. The saturation pressure at 10°C is 1.35 kPa, then the amount of water (in grams) which will get evaporated is 
  • Question 5/5
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    The relative humidity of a mixture of air and water vapour at 298 K and 1 bar is 70%. Then the specific volume (m3/kg) of air and water vapour are _____ and _____ respectively, if Ps = 0.0317 bar
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