21. Which of the following types of intensifying screens are not used in industrial radiography?
22. Match the defects with the most suitable NDT method for examining them.
Group 1
Group 2
P. Porosity
1. Accoustic emission
Q. Lack of fusion in welds
2. X-ray radiography
R. Surface cracks in aluminium
3. Ultrasonic test casting
S. Microcrack initiation in austenitic stainless steel tubing
4. Dye-penetrant inspection
| Group 1 | Group 2 |
| P. Porosity | 1. Accoustic emission |
| Q. Lack of fusion in welds | 2. X-ray radiography |
| R. Surface cracks in aluminium | 3. Ultrasonic test casting |
| S. Microcrack initiation in austenitic stainless steel tubing | 4. Dye-penetrant inspection |
23. The swift cup test evaluates the following property of a sheet metal:
24. The value true stress (σ) for engineering stress (s) 600MPa and engineering strain 1
25. Which of the following developers is applied by immersion or flow on only?
26. According to ASTM E709-95 when fluorescent particles are used, the UV light intensity shall be above
27. The number of magnetic lines of force cutting through a plane of a given area at a right angle is known as the:
28. Magnetic particle test indications which are due to cold work can best be removed by
29. The type of discontinuity potentially most harmful to the useful life of a part is
30. Highest sensitivity to fine surface cracks would be obtained by which of the following techniques?
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