McqMate
| Q. |
The efficiency of mechanical brakes is usually |
| A. | 85 - 95 percent |
| B. | 60 - 70 percent |
| C. | 30 - 40 percent |
| D. | 99 percent |
| E. | 95 - 98 percent |
| Answer» B. 60 - 70 percent | |
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