JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV NON-DESTRUCTIVE TESTING Previous Question Paper (January/February - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
PART - A
What are the factors that affect visual testing?
Answer
The primary factors affecting visual testing include the intensity and angle of illumination, the visual acuity of the inspector, the distance and viewing angle of the object, and the surface condition (cleanliness and finish) of the component being inspected.
What are the applications of visual methods?
Answer
Visual testing is applied for checking surface finish, detecting macroscopic defects like cracks, corrosion, or misalignment, verifying assembly completeness, and performing periodic maintenance inspections on weldments, castings, and pressure vessels.
What are the uses of suspending liquids?
Answer
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What are the functions of a developer?
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Define the term radiation.
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Discuss about the factors affecting film contrast.
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What are the Limitations of ultrasonic testing?
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What are the applications of UT?
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Define the principle of Hall Effect.
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List the disadvantage of eddy current inspection.
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PART - B
Explain with neat sketch the optical holographic method.
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Explain the principle and working of acoustic emission method.
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Explain with neat sketch, step by step process for detecting cracks by liquid penetrant test.
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Explain the principle, advantages and limitations of magnetic particle testing.
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Explain with neat sketch the generations of x-rays.
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Explain the factors which influence the measurement of defects by radiography technique.
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Explain the working of piezoelectric transducer with a neat sketch and write its advantages and disadvantages.
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What are the characteristics of ultrasonic waves? Explain any one method of Ultrasonic testing.
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Classify the eddy current probes on the basis of following:
Mode of application
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Mode of operation
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Explain Eddy current method with aid of block diagram and write the applications of Eddy current testing.
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