When a casting is being non destructively examined for critical service, and the possibility of cracks exists, which of the following techniques would be best?

Related MCQs

• Highest sensitivity to fine surface cracks would be obtained by which of the following techniques?
• Cracks which are caused by alternating stresses above a critical level are called:
• Which of the following will best define surface cracks?
• An inspection for surface and subsurface discontinuities in ferromagnetic welds would best be accomplished by which of the following techniques?
• Among the following, the best type of current for the detection of fatigue cracks is:
• A prod method would be most sensitive to cracks:
• A prod method would be most sensitive to cracks:
• Which of the following discontinuities would you not expect to find in a casting?
• According to ASTME 709-95 and API, in order to eliminate all contaminants, an appropriate cleaning shall be performed on all the surfaces to be examined and on a minimum of adjacent material:
• A good Cobalt-60 shot is made on a 7.6 cm (3 inches) steel casting using an exposure time of 10 minutes and a source-to-film distance of 91.5 (36 inches). If it is necessary to change the source-to-film distance to 61 cm (24 inches), what exposure time would produce a similar radiograph if all other conditions remain the same?