MCQOPTIONS
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| 1. |
In trapezoidal threads, f (coefficient of friction) can be taken as |
| A. | f sec θ |
| B. | f cos θ |
| C. | f sin θ |
| D. | f cosec θ |
| Answer» B. f cos ‚âà√≠‚Äö√†√® | |