Which of the following types of intensifying screens are not used in industrial radiography?
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Metallurgical Engineering · all questionsMetallurgical Testing and Inspection
Metallurgical Testing and Inspection
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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 |
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The swift cup test evaluates the following property of a sheet metal:
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The value true stress (σ) for engineering stress (s) 600MPa and engineering strain 1
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Which of the following developers is applied by immersion or flow on only?
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According to ASTM E709-95 when fluorescent particles are used, the UV light intensity shall be above
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The number of magnetic lines of force cutting through a plane of a given area at a right angle is known as the:
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Magnetic particle test indications which are due to cold work can best be removed by
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The type of discontinuity potentially most harmful to the useful life of a part is
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Highest sensitivity to fine surface cracks would be obtained by which of the following techniques?
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Radiographic enlargement to distinguish small defects is possible
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A suitable technique for monitoring a growing crack in an alloy is
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Which of the following techniques are not applicable for detecting internal flows in a ceramic material?
1. Liquid penetration test
2. Radiography
3. Ultrasonic testing
4. Eddy current method
1. Liquid penetration test
2. Radiography
3. Ultrasonic testing
4. Eddy current method
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Which penetrant process is best suited to detect shallow discontinuities?
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For HRA scale load and indenter are used
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Which one of the following NDT techniques cannot be used to detect an internal crack in a steel shaft?
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The ASTM grain size number N for a structural steel which shows 65 grains per square inch at a magnification of 100X is
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Match those listed in Group 1 with the NDT methods listed in Group 2.
| Group 1 | Group 2 |
| P. Penetrameter | 1. Ultrasonic test |
| Q. Differential coil probe | 2. Dye-penetrant test |
| R. Piezo-electric probe | 3. X-ray radiography |
| S. Developer | 4. Accoustic emission test |
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A pearlitic steel is observed under an optical microscope which has a numerical aperture (N.A) of 1.5 and uses the radiation of 4500A. The minimum lamellar spacing (in A) which can be resolved using this microscope is
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A common use of ultrasonic testing is
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