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‎REFERENCEPa‏

‎D R1906 +:

‎Reg No.: Name:

‎APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2018

‎Course Code: BE101-02 ९
Course Name: INTRODUCTION TO MECHANICALENGINEERING SCIENCES
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two questions, each carries 15 marks. Marks

‎1 പ Define entropy. What happens to entropy of an isolated system during (5)
irreversible process and reversible process?
b) An inventor claims to have developed an engine that works between 500 degree
Celsius and 30 degree Celsius with an efficiency of 68%. Is this claim true? (6)
Justify your answer.

‎c) Differentiate between enthalpy and internal energy. (4)

‎2 ஐ Explain the working of reciprocating air compressor with neat sketch. (8)

‎b) Describe the working of reaction type steam turbine. (7)

‎3 8) Discuss the recent space programs of ISRO. (5)

‎b) Differentiate between solid propellant rockets and liquid propellant rocked. (5)

‎c) Compare SI and CI engines. (5)
PART B

‎Answer any two questions, each carries 15 marks.

‎4 8) Describe the working of vapour compression refrigeration system with line (10)
diagram. Also show the processes on P-h and T-S coordinates.

‎b) Draw and explain the fuel system of a diesel engine. (5)
5 a) With a neat sketch explain the working of window air conditioning system. (10)
b) Drawa single plate clutch and mark different parts on it. (5)
6 8) Explain the working of turboprop engine with line diagram. (9)
b) Differentiate between comfort air-conditioning with industrial air-conditioning. (6)
PART ^
Answer any two questions, each carries 20 marks.
7 ஐ Define the following terms associated with crystallography (10)
1. Space lattice 11. Unit cell मी, Coordination number 0. Atomic
packing factor.
b) Discuss the following mechanical properties of the material (10)
i. Ductility ii. Brittleness iti. Hardness iv. Malleability ೫. Creep
8 a) Witha neat sketch explain the working of a shaper machine. (10)
b) Explain arc welding process with schematic diagram. (10)

‎9 ஐ Illustrate the properties of composites and ceramics with reference 10 the relevant (10)
fields of application.

‎b) Draw a neat diagram of a lathe and label its parts. (10)
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