PTU Punjab Technical University B-Tech May 2019 Question Papers 6th Semester AE Automobile Engineering?
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Roll No.
Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(AE) (2011 Onwards) (Sem.?6)
VEHICLE DYNAMICS
Subject Code : BTAE-603
M.Code : 71219
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and students
have to attempt any T WO questions.
SECTION-A
1.
Answer briefly :
(a) What do you mean by free vibration?
(b) Explain magnification factor.
(c) How dunkerley's method is different from Hozler method?
(d) What is wheel hop?
(e) What is an eigen value problem?
(f) What is tractive effort?
(g) What do you me www.FirstRanker.com
an by Rayleigh's coefficient?
(h) Define camber and camber thrust.
(i) Write a note on directional stability of vehicle.
(j) What is meant by roll center?
SECTION-B
2.
Explain single, two and multi degree of freedom system.
3.
Write down the requirements of a vehicle suspension system.
1 | M - 7 1 2 1 9
( S 2 ) - 6 7 0
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4.
a) An automobile having a mass of 3000 kg deflects its suspension springs 0.03 m under
static conditions. Determine the natural frequency of the automobile in the vertical
direction by assuming damping to be negligible.
b) What methods are available for solving the governing equations of a vibration
problem?
5.
Explain in details Gough's tyre characteristics.
6.
Define ride and explain ride dynamic system.
SECTION-C
7.
Explain the following Turning response properties:
Under steered gradient, Neutral steer, Under steer, Over steer, Characteristic speed and
Critical speed
8.
Write a short note on :
a) Lograthmic decrement
b) Rayleigh"s upper bound method
c) Vehicle suspensions in force apt directions
9.
For the system shown in figure given below, determine the natural frequency. Take m1 =
m2 = m3 = m kg and k1 = k2 = k3 kN/m
k1
m1
x1
k2
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m
x
2
2
k3
m3
Fig.1
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
2 | M - 7 1 2 1 9
( S 2 ) - 6 7 0
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This post was last modified on 04 November 2019