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GATE 2022 ME: RAC, PPE & IC Engines Quiz - 1

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Question 1

In a simple vapour compression refrigeration cycle, the swept volume for the compressor is 2 litres and its volumetric efficiency is 80%. If the speed of the compressor is 1800rpm. Calculate the mass flow rate, . Take the value of

Question 2

An ice making plant using refrigerant R-12 is having an evaporator saturation temperature of –25°C  and the condenser saturation temperature of 35°C . The vapour is leaving the compressor at 65°C . Following table shows the properties of the refrigerant.

Calculate the Coefficient of Performance (COP) of this system & Power consumption If the capacity of the plant is 5 kW. 

Question 3

For simple vapour compression cycle enthalpy at suction = 1600 kJ/kg, enthalpy at discharge from the compressor = 1800 kJ/kg, enthalpy at exit from condenser = 600 kJ/Kg. What is the COP for this refrigeration cycle?

Question 4

In the expansion valve of a refrigerator, the following property remains constant

Question 5

The COP of an ideal refrigerator of capacity 2.5 T is 5. The power of the motor required to run the plant is:

Question 6

In a simple vapour compression refrigeration plant, for 3kg/s of refrigerant, the refrigeration effect is 180 KW. If the refrigerant leaves the evaporator at 300kJ/kg, find out enthalpy at the condenser exit.
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