64. Series traction motor operating on undulating dc supply has undulation ratio It equal to where 'max and Imia are respectively the maximum and minimum currents.
65. In a unsymmetrical three-phase line conductors are spaced at distances D12, D23 and D31. The equivalent distance D equals
68. A 100 MW thermal power plant will consume nearly how many tonnes of coal in one hour?
69. For economic operation, the generator with highet positive incremental transmission of loss will operate at
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