MCQOPTIONS
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| 1. |
In an inverted tooth chain the included angle between the outer faces of the teeth? |
| A. | 40 to 55 |
| B. | 35 to 45 |
| C. | 60 to 75 |
| D. | Increasing the diameter of threaded portion |
| E. | 75 to 85 |
| Answer» D. | |