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what is errection pcbs?
What is diversity factor in electric installations?
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When color of silica gel will gets change from blue to pink from Top to bottom?
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In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???
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Mention the disadvantages of low power factor?
