Q. Which of the following is not true about effective diameter?

  • (A) also known as pitch diameter
  • (B) it decides quality of fit between nut and screw
  • (C) this is the diameter of minor cylinder
  • (D) it is a very important dimension for screw threads
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✅ Correct Answer: (C) this is the diameter of minor cylinder
Explanation: in case of straight thread, effective diameter is the diameter of the pitch cylinder and is also called as pitch diameter. effective diameter is the most important dimension at it decides the quality of the fit between the nut and the screw.

Published by Mr. Dubey ⭐ 111.54K Points at 21-Sep-2023 06:50 pm in Metrology and Measurements

Explanation by: Mr. Dubey
in case of straight thread, effective diameter is the diameter of the pitch cylinder and is also called as pitch diameter. effective diameter is the most important dimension at it decides the quality of the fit between the nut and the screw.

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