Automobile Engineering - Dec 2014

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) What are the function of final drive? Explain hotch kiss and torque tube drive with neat sketch.(10 marks) 1 (b) Define the following:-
(i) Camber (ii) Castor (iii) King pin inclination (iv) Toe-in Toe-out (v) Cornering power(10 marks) 2 (a) What are the requirements of a braking system? Compare drum and disc brakes. Name various component with sketch.(10 marks) 2 (b) Explain the working of an electronic ignition system and its advantages over conventional system.(10 marks) 3 (a) Discuss radial and cross ply tyres. Explain various factors affecting tyre life.(10 marks) 3 (b) What is the critical speed of a propeller shaft? Explain the significance. Also explain with neat sketch various joints used to connect propeller shaft to final drive.(10 marks) 4 (a) Compare rigid axle Suspension and independent Suspension. Explain with neat sketches. Also discus objects of Suspension.(10 marks) 4 (b) Suggest suitable suspension system for the following category of vehicles.
i) Passenger Car
ii) 50 Seater Luxury bus.(10 marks) 5 (a) Explain the working of Combined current and voltage Regulator.(10 marks) 5 (b) Explain various aerodynamic forces and moments acting on a vehicle while in motion. Also suggest suitable remedial measures to reduce the effect of these forces.(10 marks) 6 (a) What are open, semi integral vehicle structures? State their application and advantages.(10 marks) 6 (b) Describe Rack and pinion type of steering. Explain the requirement of steering(10 marks)

Write short notes on (any four)-

7 (a) Knock Sensor(5 marks) 7 (b) Oxygen Sensor(5 marks) 7 (c) Fluid Flywheel.(5 marks) 7 (d) Overall criterion for vehicle comparison(5 marks) 7 (e) Light weight materials for automotive application.(5 marks)