Page No. 294
Which D.C. motor is generally preferred for cranes and hoists ?
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In D.C. machines the residual magnetism is of the order of_________________?
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For which of the following applications a D.C. motor is preferred over an A.C. motor ?
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The condition for maximum power in case of D.C. motor is______________?
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Which one of the following is not the function of pole shoes in a D.C. machine ?
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If the supply voltage for a D.C. motor is increased, which of the following will decrease ?
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Which of the following motor is preferred for operation in highly explosive atmosphere ?
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Sparking at the commutator of a D.C. motor may result in____________?
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