Metallurgical Testing And Inspection - Study Mode

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[#91] The NDT technique used to detect deep lying defects in a large sized casting is

(A) liquid penetrant inspection

(B) magnetic particle inspection

(C) ultrasonic inspection

(D) eddy current inspection

Correct Answer

(C) ultrasonic inspection

[#92] 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

(A) P-4, Q-3, R-1, S-2

(B) P-1, Q-3, R-4, S-2

(C) P-4, Q-3, R-2, S-1

(D) P-2, Q-1, R-3, S-4

Correct Answer

(C) P-4, Q-3, R-2, S-1

[#93] Which is the process by which screw dislocation may not leave slip plane?

(A) Glide

(B) glissile

(C) climb

(D) cross-slip

Correct Answer

(C) climb

[#94] The crack which propagates through the grain is

(A) Intergranular fracture

(B) Trans granular fracture

(C) Both A and B

(D) None of these

Correct Answer

(B) Trans granular fracture

[#95] 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

(A) P-3, Q-4, R-1, S-2

(B) P-2, Q-4, R-1, S-3

(C) P-4, Q-2, R-1, S-3

(D) P-3, Q-2, R-4, S-1

Correct Answer

(D) P-3, Q-2, R-4, S-1