Metallurgical Engineering · all questions

Metallurgical Testing and Inspection
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Q101

The NDT technique used to detect deep lying defects in a large sized casting is

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Q102

Match the technique for proper distinction between the two :

P. Soft and hard magnets	1. Optical microscopy
Q. Amorphous and crystalline materials	2. Hall effect measurement
R. n and p-type semi-conductors	3. X-ray diffraction
S. Cast and wrought alloys	4. Magnetic hysteresis

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Q103

Which is the process by which screw dislocation may not leave slip plane?

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Q104

The crack which propagates through the grain is

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Q105

Match the defects given in Group I with the suitable non-destructive evaluation technique from Group II.

Group I	Group II
P. Crack in a flat aluminium slab	1. Radiography
Q. Sub-surface porosity in a bronze casting	2. Eddy current technique
R. Surface cracks in a steel tool	3. Ultrasonic technique
S. Internal porosity in a ceramic block	4. Magnetic particle technique

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Q106

A wire is stretched 3 mm by a force of 150 N. Assuming the elastic limit is not exceeded, ther stretch for 450N is:

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Q107

Demagnetization, ASTM E709-95 recommends a coil of ampere-turns:

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Q108

Why might steel parts have a greater tendency towards rusting after penetrant testing?

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Q109

In the X-ray radiography technique the tube voltage for thicker plates as compound to the thin plates, should be

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