Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 8th Semester (Eight Semester) 2018-19 NME 065 Non Destructive Testing Question Paper
Printed Paesz02 Sub Code: NME 065
Paperwz? RouNo.I | | | I I I I I I I
B TECH
(SEM?VIII) THEORY EXAMINATION 2018-19
NON DESTRUCTIVE TESTING
T ime: 3 Hours T 0tal Marks: 100
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 10 = 20
a. Enlist any five devices used for Visual inspection test.
b. Define contrast ratio and contrast sensitivity.
0. What is dwell time?
d. What is skin effect?
e. What do you mean by nature of radiation?
f. Define Braggs?s Law.
g. What is Attenuation?
h. Define Snells law.
i. Which type of probe is used to inspect the inside diameter of a bore?
j. Define Lenz?s Law.
SECTION B
2. Attempt any three of the following: 10x3=30
a. What are defects? Discuss any three casting, welding and forging defects which can
only be detected by the NDT methods,
b. What are the properties the penetrants must have in order to work well? Classify
Different types of penetrants.
0. Calculate the Bragg?s angle, if X?ray of wavelength 1.542 A de?ected by plane
(121) and interatomic spacing is 2.43 A. Assume first order re?ection.
(1. With neat sketch explain the method of ultrasonic testing and write its applications,
advantages and disadvantages.
e. Discuss the inspection of tubes of a heat exchanger and Fatigue crack inspection by
Eddy current testing.
SECTION C
3. Attempt any one part of the following: 10x1=10
a. Discuss about machine Vision technology used in Visual inspection method.
Differentiate between Manual and Automated inspection method.
b. Write short notes on the following:
i. Oil Whitening Test
ii. Hammer Test
4. Attempt any one part of the following: 10x1=10
a. What are various methods of magnetization of a ferromagnetic material? Discuss
any two of them with neat diagram.
b. What are the standards applicable to liquid penetrant testing? Write short notes on
Leak test and Zyglo penetrant test.
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Attempt any one part of the following: 10x1=10
Describe in detail about Rayleigh?s scattering and Compton?s scattering with neat diagram.
Write short notes on the following.
(1) Cooling of anode (ii) Focal Spot and Spot Size (iii) Tube Voltage and tube
current.
Attempt any one part of the following: 10x1=10
De?ne Ultrasonic testing. How this testing can help in medical diagnosis and
inspecting welded joint.
Discuss in detail about ultra sonography of human body. Mention advantages and
disadvantages of ultrasonic testing with some applications.
Attempt any one part of the following: 10x1=10
What are the factors which effects eddy current testing? Discuss the eddy current
?ow characteristics with neat diagram.
Discuss the different types of Probe used in eddy current testing with neat diagram.
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This post was last modified on 30 January 2020