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Non Destructive Testing and Evaluation MCQs: 986 Questions & Answers in Engineering

986 Non Destructive Testing and Evaluation MCQs in Engineering with answers & explanations. Page 29. Practice objective questions for competitive exams, inte… Use the answer toggle below to show or hide all solutions, tap an option to check one question, or open a question for its own page.

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Non Destructive Testing and Evaluation MCQs: 986 Questions & Answers in Engineering

A radiographic indication in a weld, characterised by two parallel dark lines in the film image, would probably be caused by:

To produce the sharpest image, which of the following should be true?

‘Undercut’ or ‘burned out’ edges of the test piece film image are caused by:

Which of the following is an advantage of gamma ray over X ray sources for radiography?

If the required X ray exposure time for a 225 kV, 5 mA exposure is 3 minutes, approximately what exposure time would be required at 10 mA?

The intensifying effects of fluorescent screens are caused by:

Unacceptable radiographic film quality would be indicated by:

The half-life of Cs-137 is approximately:

Which of the following welding discontinuities would be most difficult to image radiographically:

The most important factor in limiting radiation exposure is:

A photon-electron interaction in which a photon gives up all its energy to an electron is called:

The threshold energy below which pair production cannot occur is approximately:

Static marks are most often caused by:

When radiographic energy is decreased:

The major cause for poor definition is:

In order to increase latitude so that thick and thin portions may be radiographed at reasonable viewing densities simultaneously:

A dark circle type indication appearing on a radiograph that is the result of the failure of a core support to completely melt is called:

Dark rounded indications with rather smooth edges appear on the radiograph of casting made in sand mould. These indications would be interpreted as:

A dark, jagged, linear indication appears on a radiograph of a casting. The area is a transition area between a thick and a thin section. This indication should be interpreted as:

A dark, sharply defined, straight line in the centre of the weld, and running parallel with the length of the weld should be interpreted as:

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