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Which colour is given to the cast surfaces which are to be left not-machined?

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in Casting-Forming-Welding I by (687k points)
Which colour is given to the cast surfaces which are to be left not-machined?

(a) Red

(b) Blue

(c) Black

(d) Yellow

This question was addressed to me in exam.

My question is based upon Pattern Colours in portion Pattern and Pattern Making of Casting-Forming-Welding I

1 Answer

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Best answer
Right option is (c) Black

The explanation: Provision of colour scheme makes it easy for one to detect the part and the operation to be performed on it. According to the American pattern colour scheme, black colour is to be given for cast surface left to be not-machined.

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