Thursday, January 13, 2022

Dr.A.P.J.Abdul Kalam University BE - ME III SEM Thermodynamics [ME-223T] Dec - 2020 Question Paper

Dr.A.P.J.Abdul Kalam University Previous Year Question Paper

Bachelor of Engineering

Third Semester Main Examination, Dec-2020

Thermodynamics [ME-223T]

Branch- ME

Time: 3:00 Hrs Max Marks 70

Note : (i) Attempt any five questions. All question carry equal marks.

(ii) Answer should be precise and to be point only.

(iii) Assume suitable data if necessary & state them clearly.

Q.1 (a) State & explain zeroth law of thermodynamics. Also explain
equation of state.
(b) What is thermodynamic equilibrium? Explain the phenomenon of thermal equilibrium.

Q.2 (a) What is constant volume process? Derive an expression for the workdone, change in internal
energy, heat transfer in constant volume process
(b) State & explain first law of thermodynamics as applied to closed system undergoing a cycle.

Q.3 (a) Discuss the heat engine and refrigerator cycle with the help of a neat sketch.
(b) Give the two statements of second law of thermodynamics and prove their equivalence.

Q.4 (a) What is real gas? State the main reasons for deviation of real gases from
ideal gases.
(b) Write down Vander Waal’s equation and derive equations for evaluation of its constants

Q.5 (a) Derive an expression for the first & second T ds equations.
(b) Explain the process of steam generation. Show the various stages on p-v and T-s diagrams.

Q.6 (a) What is an Otto cycle? Show that the efficiency of the Otto cycle depands only on the
compression ratio
(b) Explain the terms- critical point, triple point, pure substance, wet steam, dry steam.

Q.7 (a) Explain with neat sketch working of two-stroke petrol engine and four-stroke diesel engine.

Q.8 Write short note on following-
(i) Brayton Cycle
(ii) P-V-T relationship
(iii) Throttling calorimeter
(iv) Mollier Chart

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