ME 2202 ENGINEERING THERMODYNAMICS THIRD UNIT EXAMINATIONS

B.E./B.TECH.DEGREE THIRD UNIT EXAMINATIONS, SEPTEMBER - 2012

REGULATIONS 2008

SECOND YEAR / THIRD SEMESTER

ME 2202 ENGINEERING THERMODYNAMICS

MECHANICAL ENGINEERING

Time: 90 MINUTES                           Date:   05.09.2012                              Maximum:50 marks

ANSWER ALL QUESTIONS

                                                                  PART – A                        (9 x 2 =18 marks)

1.     Explain the term source and sink.

2.     Why the performances of the refrigerator and heat pump are given interms of COP and not in terms of efficiency?

3.     What is the difference steam turbine  and a water turbine?

4.     Explain third law of thermodynamics

5.     Prove the relation between COP_HP and COP _ref?

6.     Define clausius inequality.

7.     What is the difference between a reservoir and a finite body?

8.     what is the function of nozzle?

9.     What is the difference between a heat pump and a refrigerator?

                                                      PART – B                       (2 x 16 =32 marks)

ANSWER ANY TWO QUESTIONS

10.                        With a neat T-S Diagram explain the principle of increase of entropy.

11.                        Describe the absolute thermodynamic temperature scale with a neat sketch.

Explain the equivalence of Kelvin – Planck and Clausius statement of second law of thermodynamics.