A pattern carries which allowance for internal and external surfaces?

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Mr. Dubey

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Q. A pattern carries which allowance for internal and external surfaces?

(A) shrinkage allowance
(B) machining allowance
(C) distortion allowance
(D) draft allowance

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✅ Correct 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.

Explanation by: Mr. Dubey

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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