Download AKTU B-Tech 7th Sem 2017-2018 NME702 Automobile Engineering Question Paper

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Printed pages: 02

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Paper Id: 4053

Roll No:

B. TECH.

(SEM VII) THEORY EXAMINATION 2017-18

AUTOMOBILE ENGINEERING

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Time: 3 Hours

Total Marks: 100

Note: Attempt all Sections. If require any missing data; then choose suitably.

SECTION A

1. Attempt all questions in brief.

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   2 x10 = 20

   1. State the main functions of frame.
   2. Classify an automobile on the basis of transmission system and wheel drive system.
   3. Why a clutch is necessary in the transmission system of an automobile?
   4. What is meant by double declutching?

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   5. What is a constant velocity joint?
   6. Explain camber and its effect on tire wear.
   7. Define bouncing and rolling.
   8. What is meant by fading of vehicle brakes?
   9. Enumerate the various requirements of a good ignition system.

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   10. Draw the layout of the air-conditioning system for a car.

SECTION B

2. Attempt any three of the following:

   10 x 3 = 30

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   1. State the difference between dry and wet types of friction clutch. List the properties of a good clutch lining.
   2. Make a comparison between sliding mesh and constant mesh gear box.
   3. State and explain the principle of Ackerman steering mechanism.
   4. Give a brief description of torsion bar and stabilizer bar.
   5. Name the pollutants emitted by gasoline engines and petrol engines into the atmosphere.

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SECTION C

3. Attempt any one part of the following:

   10 x 1=10

   1. It is possible to make a faster climb in low gear on certain gradients than in top gear. Comment on the validity of this statement.

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   2. What are synchronizers? Point out their utility in transmission.

4. Attempt any one part of the following:

   10 x 1=10

   1. What is meant by cornering force? How it is affected by slip angle, inflation pressure and tire load?

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   2. State the function of front axle. Sketch a typical front axle and give brief description of its constructional features.

5. Attempt any one part of the following:

   10 x 1=10

   1. What is meant by independent suspension system? How it is achieved in front and rear wheel?

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   2. Compare the constructional and operational aspects of disc and drum brakes. Which one is preferred and why?

6. Attempt any one part of the following:

   10 x 1=10

   1. Draw the schematic arrangements for the common rail and individual pump injection systems. Point out the relative merits and demerits of these systems.

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   2. Explain, with a neat sketch the limitations of this carburetor.

7. Attempt any one part of the following:

   10 x 1=10

   1. Mention a sectioned sketch to show the main features of a spark plug in common use. Name the main parts and state the materials from which they are made.

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   2. State and explain the construction and working of 3-way catalytic converter.

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