ME6301 ET Important Questions, ENGINEERING THERMODYNAMICS Answer Key – MECH 3rd SEM Anna University

ME6301  ET Important Questions

Anna University Regulation 2013 Mechanical Engineering (MECH) ME6301  ET Important Questions for all 5 units are provided below. Download link for MECH 3rd SEM ME6301  ENGINEERING THERMODYNAMICS  Answer Key is listed down for students to make perfect utilization and score maximum marks with our study materials.

ME6301  ET Important Questions



  1. Define thermodynamic system. How do you classify it?
  2. Distinguish between open and closed system
  3. Distinguish between the terms state and process of thermodynamics
  4. Define intensive and extensive properties.
  5. State first law of Thermodynamics for a non flow process and for a cycle.
  6. Define thermodynamic equilibrium.
  7. What do you mean by quasi-static process in thermodynamics?
  8. Differentiate between Microscopic and Macroscopic?
  9. Differentiate Quasi static and non Quasi static process?

10. What is meant by reversible and irreversible process?

  1. Define Path function and point function.
  2. Explain homogeneous and heterogeneous system.
  3. What are the conditions for steady flow process?
  4. Prove that for an isolated system, there is no change in internal energy.
  5. Enlist the similarities between heat and work.
  6. Indicate the practical application of steady flow energy equation.
  7. Prove that the difference in specific heat capacities equal to Cp – Cv = R.

18. Define Zeroth law of Thermodynamics.
19. What are the limitations of first law of thermodynamics? 20. What is perpetual motion machine of first kind?


  1. a) A rigid tank containing 0.4m3 of air at 400 kPa and 30oC is connected by a valve to a piston cylinder device with zero clearance. The mass of the piston is such that a pressure of 200 kPa is required to raise the piston. The valve is opened slightly and air is allowed to flow into the cylinder until the pressure of the tank drops to 200 kPa. During this process, heat is exchanged with the surrounding such that the entire air remains at 30oC at all times. Determine the heat transfer for this process.

    b) A reciprocating air compressor taken in 2m3/min air at 0.11MPa, 298K which it delivers at 1.5 MPa, 384 K to an after cooler where the air is cooled at constant pressure to 298 K. the power absorbed by the compressor is 4.15 kW. Determine the heat transfer in (i) the compressor (ii) the cooler. State your assumptions.

ME6301  ET All units Important Questions – Download Here

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ME6301  Answer Key, ET Unit wise Important Questions- MECH 3rd Semester




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