Download GTU B.Tech 2020 Winter 7th Sem 2172102 Non Destructive Testing Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2172102 Non Destructive Testing Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2172102 Date:19/01/2021
Subject Name:Non Destructive Testing
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS
Q.1
(a) Explain principle of visual testing and its limitations.
03

(b) Compare Non Destructive Testing with Destructive Testing.
04

(c) State principle of Liquid Penetrant Testing (LPT) and with neat
07
sketch explain different steps of LPT.


Q.2
(a) List advantages and limitations of LPT.
03

(b) List the typical characteristics of penetrant and developer in LPT.
04

(c) Explain Magnetic Particle Testing (MPT) principle and give it's
07
applications and limitations.




Q.3
(a) Why and how demagnetization is carried out?
03

(b) Briefly explain thermal methods for NDT.
04

(c) Explain in brief the leak testing of heat exchanger tubes in a boiler.
07




Q.4
(a) What is leak and its different types?
03

(b) Write a note on eddy current testing.
04

(c) Explain principle and technique of Acoustic Emission Testing
07
(AET).
Q.5
(a) What are different types of sound waves? Explain.
03

(b) Explain in brief the kind of welding defects that can be observed
04
by Ultrasonic Testing (UT).

(c) List UT methods and explain pulse echo method with neat sketch.
07



Q.6
(a) List the advantages and limitations of UT.
03

(b) With example explain UT calibration steps on V1 or V2 block.
04

(c) With neat sketch explain different types of ultrasonic probes.
07
Q.7
(a) Differentiate between X-rays and rays.
03

(b) Explain basic principle of Radiographic examination.
04

(c) Discuss the use of Radiography Testing (RT) in the field of
07
welding. Draw and explain the types of defects that can be
observed during the same.






1

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Q.8
(a) What is the use of penetrameter in RT?
03
(b) Write about the safety precautions to be taken in industrial
04
radiography.
(c) Write short note on X-ray generation with neat sketch in RT.
07

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2

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