Download AKTU B-Tech 8th Sem 2018-19 NME 065 Non Destructive Testing Question Paper

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Printed Pages: 02

Paper Id: 140255

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Sub Code: NME 065

Roll No.

B TECH

(SEM-VIII) THEORY EXAMINATION 2018-19

NON DESTRUCTIVE TESTING

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Time: 3 Hours

Total Marks: 100

Note: 1. Attempt all Sections. If require any missing data; then choose suitably.

SECTION A

2 x 10 = 20

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1. Attempt all questions in brief.

   1. Enlist any five devices used for visual inspection test.

   2. Define contrast ratio and contrast sensitivity.

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   3. What is dwell time?

   4. What is skin effect?

   5. What do you mean by nature of radiation?

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   6. Define Bragg's Law.

   7. What is Attenuation?

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   8. Define Snell's law.

   9. Which type of probe is used to inspect the inside diameter of a bore?

   10. Define Lenz's Law.

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SECTION B

2. Attempt any three of the following:

   1. What are defects? Discuss any three casting, welding and forging defects which can only be detected by the NDT methods.

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   2. What are the properties the penetrants must have in order to work well? Classify Different types of penetrants.

   3. Calculate the Bragg's angle, if X-ray of wavelength 1.542 Å deflected from (121) plane and interatomic spacing 2.43 Å. first order reflection.

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   4. With neat sketch explain the method of ultrasonic testing and write its applications, advantages and disadvantages.

SECTION C

3. Attempt any one part

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   10x1=10

   1. Discuss about machine vision technology used in visual inspection method. Differentiate between Manual and Automated inspection method.

   2. Write short notes on the following:

      1. Oil Whitening Test

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      2. Hammer Test

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4. Attempt any one part of the following:

   10x1=10

   1. Discuss the inspection of tubes of a heat exchanger and Fatigue crack inspection by Eddy current testing.

   2. What are various methods of magnetization of a ferromagnetic material? Discuss any two of them with neat diagram. What are the standards applicable to liquid penetrant testing? Write short notes on Leak test and Zyglo penetrant test.

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5. Attempt any one part of the following:

   10x1=10

   1. Describe in detail about Rayleigh's scattering and Compton's scattering with neat diagram.

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   2. Write short notes on the following.

      1. Cooling of anode

      2. Focal Spot and Spot Size

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      3. Tube Voltage and tube current.

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6. Attempt any one part of the following:

   10x1=10

   1. Define Ultrasonic testing. How this testing can help in medical diagnosis and inspecting welded joint.

   2. Discuss in detail about ultra sonography of human body. Mention advantages and disadvantages of ultrasonic testing with some applications.

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7. Attempt any one part of the following:

   10x1=10

   1. What are the factors which effect eddy current testing? Discuss the eddy current flow characteristics with neat diagram.

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   2. Discuss the different types of Probe used in eddy current testing with neat diagram.

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