Question

Shaping grey cast iron block will produce (a) continuous chip with BUE, (b) continuous chip without BUE, (c) discontinuous chip of irregular size & shape, (d) discontinuous chip of regular size & shape.

Answer 1

Shaping grey cast iron block will produce (c) discontinuous chips of irregular size & shape

Explanation for correct option:

• Grey cast iron is brittle which means that it's hard but easily breakable.

• Due to its brittle nature, while shaping the grey iron, we will be unable to get continuous chips of regular shape and size.

• So, when we shape grey cast iron, the chips break and discontinue. This makes them irregular in shape and size.

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