Metallurgical Testing and Inspection MCQ Questions and Answers

91

A tensile specimen was deformed to a true strain of 0.405. The change in the gauge length was 5 mm. The final gauge length of the specimen, in mm, is

A) 10 B) 12 C) 15 D) 18

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

92

Rockwell hardness on the 'C' scale is measured using an indentor with a

A) 120° diamond cone with a slightly rounded tip B) square base diamond pyramid C) 10 mm diameter steel ball D) 3 mm diameter steel ball

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

93

Match the suitability of non-destructive testing method in Group I for the detection of defects listed in Group II.

Group I	Group II
P. Magnetic particle inspection	1. Surface crack in martensitic stainless steels
Q. X-ray radiography	2. Surface crack in austenitic stainless steels
R. Dye penetrant test	3. Hairline crack in aluminium
S. Ultrasonic testing	4. Inclusion in steels

A) P-2, Q-4, R-3, S-1 B) P-4, Q-2, R-1, S-3 C) P-3, Q-1, R-2, S-4 D) P-1, Q-4, R-2, S-3

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

94

Brittle fracture is more dangerous than ductile fracture because

A) No warning sign B) Crack propagates at very high speeds C) No need for extra stress during crack propagation D) All are correct

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

95

The energy dispersive spectrometer (EDS) in an electron microscope does chemical analysis by analysing the energy of

A) secondary electrons B) characteristics X-rays C) auger electrons D) back-scattered electrons

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

96

If the surface crack causing fracture in a brittle material is made twice as deep, the fracture strength will

A) decrease by a factor of √2 B) decrease by a factor of 2 C) decrease by a factor of 22 D) No change

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

97

A penetrant process in which excess penetrant is removed with an organic solvent is called

A) Solvent removable B) Water washable C) Post-emulsified D) Duel method

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

98

The boundary between slip and unslip plane is called

A) dislocation B) point defect C) surface defect D) volume defect

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

99

Match the NDT method in Group 1 with the items in Group 2.

Group 1	Group 2
P. Ultrasonic testing	1. Core shift in castings
Q. Dye penetrant testing	2. Surface defects in HSLA welds
R. Magnetic particle inspection	3. Fillet welds
S. Radiography	4. Hot crack in austenitic SS welds

A) P-3, Q-2, R-4, S-1 B) P-3, Q-4, R-2, S-1 C) P-1, Q-4, R-2, S-3 D) P-1, Q-2, R-3, S-4

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

100

The technique (s) which can be used for the direct observation of dislocations is (are)

A) scanning electron microscopy B) transmission electron microscopy C) field-ion microscopy D) electron probe micro analysis

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Metallurgical Testing and Inspection MCQ Questions and Answers | Metallurgical Engineering