E2 A192014 Pages: 1

Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE EXAMINATION(S), DECEMBER 2019

Course Code: ME100
Course Name: BASICS OF MECHANICAL ENGINEERING

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two questions, each carries 15 marks. Marks
1 2) State and explain second law of thermodynamics. (5)
b) Derive the expression for the efficiency of a Carnot cycle. (10)
2 a) Compare intensive and extensive properties with examples. (5)
b) With the help of ೩ neat diagram explain the working of an impulse steam turbine (10)
clearly showing the variation of steam pressure and velocity.
3 9) Witha neat diagram explain the working of a Cochran boiler. (10)
b) Compare an open cycle and closed cycle gas turbine. (5)
PART ‏تا‎
‎Answer any two questions, each carries 15 marks.
4 9) Define the following terms: (i) absolute humidity (ii) relative humidity (iii) DBT (5)
(iv) WBT and (v) Sensible heat.
b) With neat sketches explain the working of vapour compression refrigeration (10)
system.
5 ഒ) With a neat sketch explain the working of a domestic refrigerator. (10)
b) With a neat sketch explain an epicyclic gear train. (5)
6 ஐ Witha neat sketch explain the working of a single plate clutch. (10)
b) Two mating spur gears have 60 and 40 teeth. Their common module is 5 mm. (5)
Determine centre to centre distance between the gear axes.
PART C
Answer any two questions, each carries 20 marks.
7 ച With the help of a neat diagram explain the arc welding process. (8)
b) Explain the extrusion process. Compare direct and indirect extrusion process. (6)
c) Explain important mechanical properties of materials. (6)
8 a) Explain forging process. With suitable diagrams discuss any four forging (8)
operations.
b) With the help of a flow diagram explain the principle of numerical control (8)
machine.
c) Explain any four operations performed on a lathe. (4)
9 ച Explain various casting defects. (8)
(b) Explain the steps involved in powder metallurgy process. (6)
(c) Compare up milling and down milling process. (6)

Page 1of 1