Automobile Engineering - Dec 2015
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) With the help of neat sketch explain (i) Scrub radius, (ii) Caster, (iii) Camber, (iv) Toe-in, Toe-out (v) Under steer and over steer.(10 marks) 1 (b) Explain with neat sketch working of Vacuum-servo brakes.(10 marks) 2 (a) Explain the various sources of vibration in vehicle and steps taken to Minimize these vibrations. What is its effect on comforts human body?(10 marks) 2 (b) Differentiate between Fluid flywheel and Torque converter.(10 marks) 3 (a) What are the different types steering gears? What is the purpose of Steering gear? Explain with sketch re-circulating ball type of steering gear.(10 marks) 3 (b) What is the necessity of gear box? Explain the working of constant mesh gear box.(10 marks) 4 (a) Explain with sketch working of Mac-Persons strut type independent suspension, with its advantages and di-advantages.(10 marks) 4 (b) Explain with a sketch working of distributor less electronics ignition system.(10 marks) 5 (a) Explain with sketch important driver's seat. What are the basic Parameters involved in design of driver's seat.(10 marks) 5 (b) Discuss the overall criteria for vehicles comparison in the same category.(10 marks) 6 (a) Explain in detailed the position and working of Sensors (i) MAP (ii) Lambda (iii) SAW.(10 marks) 6 (b) Explain in detailed the working of ECM in a vehicle.(10 marks)
Write short notes on the following (any four).
7 (a) Comparison of semi integral and integral structure.(5 marks) 7 (b) Leading shoe and trailing shoe(5 marks) 7 (c) Factors affecting tyre life.(5 marks) 7 (d) Battery ratings.(5 marks) 7 (e) Visibility and blind area.(5 marks)