Download GTU BE/B.Tech 2017 Winter 8th Sem New 2180209 Noise Vibration And Harshness And Safety Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 8th Sem New 2180209 Noise Vibration And Harshness And Safety Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VIII (NEW) EXAMINATION ? WINTER 2017
Subject Code: 2180209 Date: 15/11/2017

Subject Name: Noise, Vibration & Harshness and Safety

Time:02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS

Q.1 (a) Define (i) Noise (ii) Vibration (iii) Harshness in
reference to vehicular application.
03
(b) List out the equipments used in NVH and give the
applications of each.
04
(c) Derive wave equation of sound.

07
Q.2 (a) Give the classification of vibration with short detail. 03
(b) What is Structure borne sound and air borne sound? 04
(c) What is CFD? Give the advantages and disadvantages of
CFD.
07
OR
(c) Explain MATLAB/SIMULINK for automotive system
design.
07
Q.3 (a) Give the advantages and applications of Rubber
embedded metallic bushes.
03
(b) Give the sources of Vibrations in vehicle. 04
(c) Write a short not on Passive and Active suspension. 07
OR
Q.3 (a) What is Acoustics of vehicle? 03
(b) Discuss an importance of Damper. How it?s working? 04
(c) Explain vibration due to tire and wheel in detail. 07
Q.4 (a) What are the Noise limits in Db for two and three
wheelers in India?
03
(b) Describe Doppler effect. 04
(c) Classify the Transducers and explain Piezoelectric
transducers.
07
OR
Q.4 (a) Which are the causes of squeaky brakes? 03
(b) Write a short note on Viscous damping. 04
(c) Classify damper and explain Hydraulic damper with neat
sketch.
07
Q.5 (a) What is vibration isolation? 03
(b) Give the merits, demerits and applications of Anechoic
Chambers.
04
(c) Write a short note on Microphone. 07
OR

Q.5 (a) Explain porous sound absorbers in brief. 03
(b) Describe Psychological effect of noise and vibrations. 04
(c) Compare Active safety features with Passive safety
features of a vehicle.
07

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