JNTU Kakinada B-Tech 4-1 AUTOMOBILE ENGINEERING R13 March 2018 Question Paper

IV B.Tech I Semester Supplementary Examinations, February/March – 2018
AUTOMOBILE ENGINEERING (Mechanical Engineering)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ALL sub questions from Part-A
Answer any THREE questions from Part-B
*****

PART ?A (22 Marks)1. a) How can turbo-charging improve performance of an engine? [4]
b) Why it is important to maintain tyre pressure? [4]
c) What is centre point steering? [3]
d) What are basic requirements of braking fluid? [4]
e) Explain why engines should not be sub-cooled. [3]
f) Explain why pollution standards have to be maintained. [4]

PART ?B (3×16 = 48 Marks)2. a) Explain how a four wheel drive mechanism offers better power transmission in a
automobile.
[8]
b) Draw and explain with a simple sketch, pressurized lubrication system with its
relative advantages.
[8]

3. a) What is the necessity for clutch assembly in transmission system and explain the
construction and working of a single plate clutch.
[8]
b) Explain with a simple sketch, working of differential in a automobile. [8]

4. a) Define camber, castor, king pin rake angles and their significance in steering
geometry.
[8]
b) With the help of a schematic diagram, explain Ackerman steering mechanism. [8]

5. a) Explain the functioning of independent front wheel suspension system with
torsion bar in a automobile.
[8]
b) Explain with a suitable schematic diagram, working of hydraulic braking system
in a vehicle.
[8]

6. a) What is ABS and how does ABS helps in improving uncontrolled skidding? [8]
b) Why bull bars are being discouraged legally by Indian government ? comment? [8]

7. a) Briefly discuss the mechanism of formation of pollutants in engine exhaust. [8]
b) Discuss the tests that a crank shaft should be subjected to before re-installation in
a engine.
[8]
Code No: RT41031
RT42211
Set No. 1
R13
1 of 1