Download JNTUA M.Tech 1st Sem 2018 Aug-Sept 9D15106c Non Destructive Evaluation Question Paper

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Code: 9D15106c

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M.Tech I Semester Supplementary Examinations August/September 2018

NON DESTRUCTIVE EVALUATION

(Machine Design)

(For students admitted in 2013, 2014, 2015 & 2016 only)

Time: 3 hours

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Max. Marks: 60

Answer any FIVE questions

All questions carry equal marks

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1. With neat sketches, explain the principle, operational steps advantages and limitations of fluorescent dye penetrant inspection.

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2. Discuss the importance of the physical characteristics of source, object and film and geometrical relationships between them. Explain the problems encountered in image or shadow formation.
3. Explain about, how will:
   1. Image enlargement.
   2. Image unsharpness are controlled in X-ray radiography.
4. Draw a sketch of typical IIW standard reference block and explain the usage of this block for checking the following:
   1. The index point and beam angle of an angle beam probe.

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   2. The sensitivity of normal beam probes.
5. Explain the various methods used in Ultrasonic with its special applications.
6. Explain the working principles of optical holography and discuss its advantages and disadvantages.
7. Suggest an appropriate NDT technique for each of the following inspection requirements:
   1. Inspection of pitting corrosion marks inside long seamless pipes.

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   2. Identifying the thickness variation of tubular products in mass production. Justify your suggestion with the procedural aspects specific to each case.
8. Explain the testing procedures for inspection of the following:
   1. A butt welding of 100 mm thick made over single V groove, using ultrasonic test.
   2. A circumferential butt weld in a pressure vessel of 1500 mm diameter using gamma ray radiography.

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