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MP Sub-Engineer ME: Availability and Irreversibility Quiz 5

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Question 1

Second law efficiency for all reversible processes will be equal to

Question 2

One side of wall is maintained at 400K and other is at 300K. The rate of het transfer through the wall is 1000W and the surroundings temperature is 25°C. Assuming no generation of heat within the wall, the irreversibility (in w) due to heat transfer through the wall is:-

Question 3

Which of the following is not a high grade energy?

Question 4

Find the increase in unavailable energy associated with transfer of 800kJ of heat from a constant temperature system at 600K to another constant temperature at 400K. The ambient temperature is 300K.

Question 5

Energy is ____ conserved and exergy is ____ conserved.

Question 6

A source at a temperature of 500 K provides 1000 kJ of heat. The temperature of environment is 27 °C. The maximum useful work (in kJ) that can be obtained from the heat source is ________

Question 7

Gibb’s free energy functions is a property Comprises.

Question 8

Increase in entropy of a system represents ________.

Question 9

Availability of a system at any given state is

Question 10

8 Kg of water in a constant pressure container is agitated by a paddle unit, the temperature rises from 50^oC to 90^oC. The change in entropy ( in KJ/K) of water is

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AE & JE Exams Mechanical Engineering

Apr 10AE & JE Exams