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.

Published by Mr. Dubey ⭐ 111.54K Points at 20-Sep-2023 12:46 pm in Manufacturing Technology

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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