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in Foundry and Forging by (110k points)
Purple colour is used for ________

(a) Machineable parts

(b) Non-machineable parts

(c) Parting surface

(d) Cannot be used on any surface

This question was posed to me in an international level competition.

This intriguing question originated from BIS Colour Coding in division Casting Processes of Foundry and Forging

1 Answer

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Best answer
Correct choice is (d) Cannot be used on any surface

Best explanation: The purple colour is not allotted to any function in the American Colour code pattern. Hence, even if it is applied on any surface it is not possible to determine its function. The application of purple if done is solely due to the industry rules or customer needs.

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