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ESE 2021 ME Technical Quiz || First Law of Thermodynamics
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Question 1
A closed system undergoes a process 1-2 for which the values of W1-2 and Q1-2 are +50kJ,+20kJ, respectively. If the system is returned to state 1 and Q2-1 is -10 kJ, what is the value of the work W2-1?
Question 2
Assertion (A) : The internal energy depends on the internal state of a body, as determined by its temperature , pressure and composition.
Reason (R) : Internal energy of a substance does not include any energy that it may possess as a result any macroscopic position or movement.
Reason (R) : Internal energy of a substance does not include any energy that it may possess as a result any macroscopic position or movement.
Question 3
Is it possible to reach initial state by an adiabatic process in a process a system receives 40 kJ of heat from a reservoir and does 70 kJ of work?
Question 4
A fan is to accelerate quiescent air to a velocity of 12 m/s at a rate of 3 m3/sec. If the density of air is 1.15 kg/m3, the minimum power that must be supplied to the fan is _____ Watt.
Question 5
A 1200 kg vehicle travelling at 90 km/hr impacts a plunger attached to a piston-cylinder arrangement. If all of the energy of the vehicle is absorbed by the 100 kg of liquid contained in the cylinder. The maximum temperature rise of the liquid is ________ °C. The specific heat of the liquid is 4.0 kJ/kg °C.
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Apr 22ESE & GATE ME
