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| Q. |
What is the alternative name of functional diameter? |
| A. | cone diameter |
| B. | virtual diameter |
| C. | root diameter |
| D. | inside diameter |
| Answer» B. virtual diameter | |
| Explanation: functional diameter is also known as virtual diameter. for an internal or external thread, this is the pitch diameter of the enveloping thread, lead and flank angles having the full depth of engagement but not at roots and crests. | |
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