MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
| 1. |
The maximum efficiency of screw jack is (when ϕ - angle of friction): |
| A. | \(\eta = \frac{{1 - sin\phi }}{{1 + sin\phi }} \) |
| B. | \(\eta = \frac{{1 + sin\phi }}{{1 - sin\phi }} \) |
| C. | \(\eta = \frac{{1 - tan\phi }}{{1 + tan\phi }} \) |
| D. | \(\eta = \frac{{1 + tan\phi }}{{1 - tan\phi }} \) |
| Answer» B. \(\eta = \frac{{1 + sin\phi }}{{1 - sin\phi }} \) | |