Automobile Engineering - May 2013

Mechanical Engineering (Semester 8)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1(a) Explain the principle of Electronic Ignition system(5 marks) 1(b) Describe principle of operation of Overdrive.(5 marks) 1(c) Explain the working of free-wheel unit.(5 marks) 1(d) Describe any one of live axle(5 marks) 2(a) Draw a neat sketch and describe in detail the working of master cylinder used in hydraulic brakes.(10 marks) 2(b) Draw and Describe wheel cylinder.(10 marks) 3(a) With reference to brake shoe arrangement in drum brakes, explain the following;
One leading and one trailing shoe type of arrangement
Two leading shoe type of arrangement Gear box(7 marks) 3(b) Explain the process of shifting from 2nd gear to 3rd gear in the constant mesh gear box.(7 marks) 4(a) With neat sketch explain the construction,working advantages,disadvantages and application of single plate dry friction clutch.(6 marks) 4(b) Explain the construction and working of Vacuum servo brakes.(10 marks) 5(a) What are the requirements of steering?Explain Rack and Pinion type of steering.(10 marks) 5(b)

Define the following terms w.r.t steering geometry:
i)  Caster
ii) Camber
iii) King Pin Inclination
iv) Toe
v) Combined Angle

Any four

7(a) Write short Notes on:
Wishbone Suspension(5 marks) 7(b) Materials for Body Construction(5 marks) 7(c) Fluid Flywheel.(5 marks) 7(d) Torsion Bar(5 marks) 7(e) Radial ply tyres(5 marks) 7(f) Cutout Relay(5 marks)