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ISRO ME 2019 Thermodynamics Booster Quiz -2
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Question 1
A house that is losing heat at a rate of 60,000 kJ/hr when the outside temperature drops to 4 °C, is to be heated by electric resistance heaters. If the house is to be maintained at 24 °C at all times, then the irreversibility (in kW) of this process is
Question 2
Which of the following statements is true for an isentropic process?
Question 3
Evaluate the least power necessary to pump this heat out continuously. If heat leaks into the freezer at the continuous rate of 2.3 kJ/s for a domestic food refrigerator maintains a temperature of – 11 °C. The ambient air temperature is 37 °C.
Question 4
What will be the final temperature of a gas if initial and final volume of gas is 0.3 m3 and 0.6 m3 respectively for a perfect gas at pressure of 800 kPa and temp. 600 K is expanded to 2 bar pressure.
Question 5
In a Rankine cycle lower limit on the condenser pressure is due to the
Question 6
In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at
Question 7
A device containing an ideal gas executes the cycle shown.
This is a.
This is a.
Question 8
Refrigerant vapor enters into the compressor of a standard vapor compression cycle at - 10 °C (h = 402 kJ/kg) and leaves the compressor at 50 °C (h = 432 kJ/kg). It leaves the condenser at 30 °C (h = 237 kJ/kg). The COP of the cycle is ________
Question 9
Which of the following is the application of cascade refrigeration system
Question 10
Atmospheric air at 1.013 bar and 35 °C has relative humidity 70% the saturation pressure of water vapour at 35 °C is 5.628 kPa. The specific humidity of water vapour in kg vapour per kg dry air will be
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