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Which of the following types of inspection is mostly used for the identification of cast bumps on the castings?

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Which of the following types of inspection is mostly used for the identification of cast bumps on the castings?

(a) Radiography

(b) Eddy current method

(c) Visual inspection

(d) Dimensional inspection

This question was addressed to me at a job interview.

This intriguing question originated from Salvaging Techniques topic in division Salvage of Defective Castings of Casting-Forming-Welding I

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Correct option is (c) Visual inspection

Explanation: The surface areas of casting manifested by one or more partially cast bumps are first identified by visual inspection or sometimes by thermo-graphy. After identification, the areas are cleaned and the defective bumps are removed by the machining operations like grinding and grit blasting.

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