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
92. Rockwell hardness on the 'C' scale is measured using an indentor with a
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
| 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 |
94. Brittle fracture is more dangerous than ductile fracture because
95. The energy dispersive spectrometer (EDS) in an electron microscope does chemical analysis by analysing the energy of
96. If the surface crack causing fracture in a brittle material is made twice as deep, the fracture strength will
97. A penetrant process in which excess penetrant is removed with an organic solvent is called
98. The boundary between slip and unslip plane is called
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
| 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 |
100. The technique (s) which can be used for the direct observation of dislocations is (are)
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