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ISRO ME 2019 Thermodynamics Booster Quiz -3
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Question 1
A piston cylinder device contains 0.05 m3 of gas initially at 180 kPa. At this state, a linear spring that has a spring constant of 150 kN/m is just touching the piston but exerting no force on it. Now heat is transferred to the gas, causing the piston to rise and to compress the spring until the volume inside the cylinder doubles. If the cross-sectional area of the piston is 0.25 m2, then the total work done (in kJ) by the gas will be
Question 2
A Lenoir cycle comprises the following processes:
I. Isochoric heat addition of 470 kJ/kg.
II. Adiabatic expansion to its original pressure with loss of 140 kJ/kg in internal energy.
III. Isobaric compression to its original volume with heat rejection of 400 kJ/kg.
What will be the overall heat transfer and work done during the cycle respectively?
I. Isochoric heat addition of 470 kJ/kg.
II. Adiabatic expansion to its original pressure with loss of 140 kJ/kg in internal energy.
III. Isobaric compression to its original volume with heat rejection of 400 kJ/kg.
What will be the overall heat transfer and work done during the cycle respectively?
Question 3
Which of the following thermodynamic process is hyperbolic
Question 4
Two bodies A and B of heat capacities CA and CB at temperatures TA and TB are brought to the same temperature T by means of a reversible heat engine then, the correct expression for 
is given by
is given by Question 5
A steam plant has the boiler efficiency of 90%, turbine efficiency (mechanical) of 94%, generator efficiency of 98 % and cycle efficiency of 40%. If 8 % of the generated power is used to run the auxiliaries, the overall plant efficiency is
Question 6
What is the speed of sound in Neon gas at a temperature of 500 K (Gas constant of Neon is 0.4210 kJ/kg-K) ________?
Question 7
Gas turbine cycle with regenerator improves
Question 8
The bank of tubes at the back of a domestic refrigerator are:
Question 9
Which of the following is not true for Designation of Refrigerants?
Question 10
Air after passing from a heating coil of temperature 45℃ is obtained at 38℃. Calculate inlet air temperature, if the bypass factor of the coil is 0.35.
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