Download GTU BE/B.Tech 2018 Winter 7th Sem Old 170202 Automobile System Design Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem Old 170202 Automobile System Design Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VII (OLD) EXAMINATION ? WINTER 2018
Subject Code: 170202 Date: 26/11/2018

Subject Name: Automobile System Design

Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Explain Ackerman?s theory with sketch diagram. 07
(b) Differentiate between single plate clutch and multiplate clutch. 07
Q.2 (a) Explain anti-lock braking system used in modern vehicle. 07
(b) Explain advantages and disadvantages of internal expanding brake used in
vehicle.
07
OR
(b) A centrifugal clutch consists of four shoes, each having a mass of 1.5 kg. in the
engaged position. The radius to the center of gravity of each shoe is 110mm,
while the inner radius of the drum is 140mm; the coefficient of friction is 0.3.
the pre-load in spring is adjusted in such a way that the spring force at beginning
of engagement is 700N. the running speed is 1440 rpm calculate
1) The speed at which the engagement begins
2) The power transmitted by the clutch at 1440 rpm.
07
Q.3 (a) Derive require design parameters for helical-coil spring. 07
(b) Give detail explanation of a leaf spring construction with sketch used in heavy
duty vehicle.
07
OR
Q.3 (a) A helical spring is made from a wire of 6mm diameter and has outside diameter
of 75mm. if the permissible shear stress is 350Mpa and modulus of rigidity
84kN/mm
2
, find the axial load which the spring can carry and the deflection per
active turn. Wahl?s stress factor may take 1.12. Assume suitable data if require.
07
(b) List down the different types of axels and explain any one of them in detail. 07
Q.4 (a) Explain working and construction of hydraulic braking system in vehicle. 07
(b) Write a short note on Air resistance and Grade resistance. 07
OR
Q.4 (a) Explain the rack and pinion steering gear mechanism with the suitable sketch
diagram.
07
(b) A truck has pivot pins 1.37m a part, the length of each track arm is 0.17m and
the track rod is behind front axel and 1.17m long. Determine the wheel base
which will give true rolling for all wheels when the car is turning so that the
inner wheel stud axel is 60
O
to the center line of the car a geometrical
construction mat be used. assume necessary if require.
07
Q.5 (a) Write a short not on Universal joint assembly. 07
(b) Explain the johnson?s method for optimum design. 07
OR

Q.5 (a) Explain the double hooke?s type CV joint. 07
(b) Write a short note on Non-driving Hub. 07

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