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# ME8391 Question Bank ENGINEERING THERMODYNAMICS

## Sample ME8391 Question Bank ENGINEERING THERMODYNAMICS:

2 Mark in Question paper (Part A Questions)

1. What do you understand by pure substance?

2. Define thermodynamic system.

3. Name the different types of system.

4. Define thermodynamic equilibrium.

5. What do you mean by quasi-static process?

6. Define Path function.

7. Define point function. (ME8391 Question Bank ENGINEERING THERMODYNAMICS)

8. Explain homogeneous and heterogeneous system.

9. What is a steady flow process?

10. Prove that for an isolated system, there is no change in internal energy.

11. Indicate the practical application of steady flow energy equation.

12. Explain Mechanical equilibrium. (Question Paper)

13. Explain Chemical equilibrium.

14. Explain Thermal equilibrium.

15. Define Zeroth law of Thermodynamics. (ME8391 Question Bank ENGINEERING THERMODYNAMICS)

16. What are the limitations of first law of thermodynamics?

17. What is perpetual motion machine of first kind?

18. Differentiate between Microscopic and Macroscopic?

19. Differentiate Quasi static and non Quasi static process?

20. Differentiate reversible process and irreversible process? (ME8391 Question Bank ENGINEERING THERMODYNAMICS)

16 Mark in Question paper (Part B Question)

1. a) A rigid tank containing 0.4 m 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, 293K which it delivers at 1.5 Mpa, 384 K to an after cooler where the air 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. (ME8391 Question Bank ENGINEERING THERMODYNAMICS)

2. In a turbo machine handling an incompressible fluid with a density of 1000kg/m3 the conditions of the fluid at the rotor entry and exit are as given below:
1. Inlet Exit Pressure 1.15 MPa 0.05MPa Velocity 30 m/sec 15.5 m/sec
Height above datum 10 m 2m. If the volume flow rate of the fluid is 40 m3/s, estimate the net energy transfer from the fluid as work. (ME8391 Question Bank ENGINEERING THERMODYNAMICS)

3. Three grams of nitrogen gas at 6 atm and 160oC is expanded adiabatically to double its initial volume and then compressed again at constant volume to its initial state. Calculate the work done on the gas. Draw the p-V diagram for the process. Specific heat ratio of nitrogen is 1.4.

4. Describe steady flow energy equation and
 deduce suitable expression for the expansion of gas in a ga turbine with suitable assumptions.
 apply the equation to a nozzle and derive an equation for velocity at exit.
 Derive the suitable expression for the ideal compressor and specify the assumptions onder which such equation is aplicable. (ME8391 Question Bank ENGINEERING THERMODYNAMICS)

 Subject name ENGINEERING THERMODYNAMICS Semester 3 Subject Code MA8391 Regulation 2017 regulation

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