MCQOPTIONS
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MCQOPTIONS
| 1. |
The efficiency of the a screw jack is maximum, when |
| A. | α = 450 + ɸ/2 |
| B. | α = 450 – ɸ/2 |
| C. | α = 900 + ɸ |
| D. | α = 900 – ɸ |
| Answer» C. | |