Q.

A pattern carries which allowance for internal and external surfaces?

A. shrinkage allowance
B. machining allowance
C. distortion allowance
D. draft allowance
Answer» D. draft allowance
Explanation: draft allowance is also known by the name of tapering allowance, as the diameter of the cast goes on increasing in a trapezoidal shape from the bottom. a pattern has a draft allowance of an order of 1 and 3 degrees for external and internal surfaces respectively.

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