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| Q.7 | In impulse turbine, the optimum blade speed ratio for maximum efficiency (taking A as the acute nozzle angle measured from the direction of blade velocity) is: | |
| Ans | 1. cos (2A) | |
| 2. (cos A)/2 | ||
| 3. cos (A/2) | ||
| 4. 2 (cos A) |
Correct Ans Provided: 2
