Explore topic-wise MCQs in Thermodynamics.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

Identify the incorrect statement, from the following options:Irreversibility is introduced into the desired isentropic compression in an air compressor by _____.

A. Heat loss from compressor walls
B. Rapid compression
C. Mechanical losses in bearings
D. Friction between air and cylinder walls
Answer» D. Friction between air and cylinder walls
Discussion
2.

An amount of 1000 kJ of heat is added to a system during a constant pressure vapourization process at a temperature of 227°C. The available energy added to the system, if the temperature of the surrounding is 27°C, is

A. 600 kJ
B. 500 kJ
C. 400 kJ
D. 300 kJ
Answer» D. 300 kJ
Discussion
3.

Consider the following statements regarding availability:1) Is generally conserved2) It can either be negative or positive3) It is the maximum theoretical work obtainable4) It can be destroyed in irreversibilityWhich of the above statements are correct?

A. 3 and 4
B. 1 and 2
C. 1 and 3
D. 2 and 4
Answer» B. 1 and 2
Discussion
4.

100 kJ of energy is transferred from a heat reservoir at 1000 K to a heat reservoir at 500 K. The ambient temperature is 300 K. The loss of available energy due to heat transfer process is

A. 20 kJ
B. 30 kJ
C. 40 kJ
D. 50 kJ
E. 60 kJ
Answer» C. 40 kJ
Discussion
5.

An ideal gas is throttled through an insulated pipe at the rate of 3 kg/s. There is a 10% pressure drop from an inlet to exit of the pipe. The values of R = 0.287 kJ/kgK and T0 = 300 K. The rate of energy loss for the pressure drop due to friction, will be nearly

A. 34 kW
B. 30 kW
C. 26 kW
D. 22 kW
Answer» D. 22 kW
Discussion