Enrolment No,
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-V (NEW) EXAMINATION - WINTER 2018
Subject Code:2150202 Date:16/11/2018
Subject Name:Automobile Systems
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) Classify automobiles according to different applications. 03
(b) Explain with neat sketch vehicle layout for front engine front wheel drive. 04
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(c) Explain types of suspension system ? Explain the Mac Pherson strut type of independent suspension in detail. 07
Q.2 (a) Explain braking efficiency. 03
(b) Explain functions of automobile frame. Give comparison of conventional frame and frameless construction. 04
(c) Explain hydraulic braking system. Explain construction and working of Master cylinder with neat sketch. 07
OR
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(c) Classify various types of brakes. Explain difference between drum brake and disc brake. 07
Q.3 (a) Explain the working of Continuously variable transmission. 03
(b) Explain Bleeding of Brake with neat sketch. 04
(c) Give the difference between automatic and manual transmission . Explain fluid flywheel. 07
OR
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Q.3 (a) Define the following terms: 03
- Over steer
- Under'steer
- Cornering power
(b) Explain working of torque converter with a neat sketch . 04
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(c) What is steering’ geometry ? Define the different terms related to the steering geometry: 07
Q.4 (a) What is the requirement of propeller shaft ? Explain with neat sketch. 03
(b) Distinguish between semi floating and full floating rear axles with the aid of suitable sketches. 04
(c) Explain important of steering gearbox. Explain any two types of steering gear box with neat sketch. 07
OR
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Q.4 (a) Explain the necessity of power steering in an automobile 03
(b) Explain final drive. Explain types of gear used in final drive mechanism. 04
(c) What do you mean by correct steering ? Write down the necessary condition for correct steering. 07
Q.5 (a) Define the following terms: 03
- Air resistance
- Gradiability
- Traction and Tractive effort.
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(b) Explain power required and engine characteristics of automobile. 04
(c) Which are the basic considerations for suspension system ? Explain in detail Telescopic type shock absorber. 07
OR
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Q.5 (a) Explain the following terms in details. 03
- Over inflation
- Air bleeding
- Under inflation.
(b) Briefly discuss about specification of tyres with example. 04
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(c) Give the comparison between radial tyre and bias tyre. Explain tyre tread pattern with suitable sketch. 07
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