Anna University Chennai 2003 B.E Automobile Engineering AT 236 - Question Paper

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2003

Fourth Semester

Automobile Engineering

AT 236 — AUTOMOTIVE CHASSIS

Time : 3 hours Maximum : 100 marks
ans ALL ques..
PART A — (10 ´ two = 20 marks)
1. Mention the various loads acting on vehicle frame.

2. elaborate the various kinds of stub axle?

3. Name the various kinds of steering gear boxes.

4. What do you mean by non-slip differential?

5. elaborate the loads acting on rear axle?

6. List out the functions of a propeller shaft.

7. Why do the automotive vehicles need a suspension system?

8. List out the factors affecting the stopping distance of a vehicle.

9. What do you mean by ‘brake fad’?

10. Write 2 examples for constant velocity universal joints.

PART B — (5 ´ 16 = 80 marks)
11. (i) Derive an expression for the condition of actual rolling motion of wheels during steering. (8 )

(a) (ii) discuss with neat sketch the construction and working principle of power steering. (8 )

12. (a) elaborate the various tests available for the vehicle frame? discuss in detail with neat sketches. (16)

Or

(b) (b) (i) define the construction and working principles of ‘Hotchkiss’ and ‘Torque tube’ drives. (12)

(c) (ii) elaborate the effects of driving thrust and torque reaction? (4)

13. (a) (i) discuss with neat sketch the construction and working principle of a differential unit. (10)

(d) (ii) elaborate the various kinds of final drive? discuss their significance. (6)

Or

(e) (b) define the construction and working principles of 3 kinds of rear axle. (16)

14. (a) (i) Compare the merits and demerits of Independent suspension system with conventional suspension system. (6)

(f) (ii) List out the different kinds of front independent suspension system. discuss any 2 systems in detail. (10)

Or

(g) (b) (i) discuss with a neat sketch the construction and working principle of a shock absorber. (8 )

(h) (ii) Write short notes on ‘rubber suspension’ and ‘pneumatic suspension’ systems. (8 )

15. (a) (i) Derive an expression to obtain the torque developed by ‘leading’ and ‘trailing’ shoes in a drum brake. (10)

(i) (ii) Compare Disc and drum kind of brakes. (6)

Or

(j) (b) (i) elaborate the advantages and disadvantages of hydraulic braking system? (6)

(k) (ii) Draw the layout of air braking system and discuss the working principle of the air braking system. (10)

Earning:   Approval pending.