McqMate
| Q. |
control method is |
| A. | high initial cost |
| B. | high maintenance cost |
| C. | low efficiency at high loads |
| D. | high cost, high maintenance and low efficiency |
| Answer» D. high cost, high maintenance and low efficiency | |
| Explanation: ward leonard speed control method requires large number of building blocks like generators, motors. thus, installing cost and maintenance cost of the whole unit is very high. apart from cost, it gives low efficiency at very high loads. | |
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