The correct number of ampere-turns for a given test specimen is determined by:

Related MCQs

• A 7.6 cm (3 inches) thick test specimen is radiographed with a source having size of 1.3 cm (1/2 inch), the film is placed in contact with the test specimen. The source to film distance is 40.6 cm (16 inches).The geometric unsharpness obtained is:
• The proper number of ampere-turns for a given test specimen is determined by:
• Which of the following test frequencies would generally provide the best penetration in a 12 inch thick specimen of coarse-grained steel?
• When using a straight beam technique to examine a thick test piece what change(s) would you expect to see in back wall echo size as you approach the side of the test piece? (Transducer remains completely on test piece)
• Which of the following is the correct formula to use for calculating geometric unsharpness if F=source size, T=specimen thickness, D=source to object distance and Ug=geometric unsharpness:
• The range of the specimen thickness that can be adequately recorded on a radiograph is known as the of the radiograph.
• The ‘multi-film’ technique may be used when one radiograph film does not have enough to produce a satisfactory radiograph of a specimen.
• How is the correct emulsifier contact time determined?
• For adequate test results, the black light used in fluorescent penetrant examination should provide what minimum black light intensity at the test surface?
• When performing a post emulsifiable penetrant test, the test piece does not rinse acceptable clean during normal processing. What should be done?