Q121
Open questionA Weston frequency meter is
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Electrical Engineering · all questionsElectrical Machine Design
Electrical Machine Design
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Q122
Open questionA _____ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly
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Q123
Open questionIn D.C. machines, the ________ in field mmf results in increase in size and cost of machines.
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Q124
Open questionFor measurement of mutual inductance we can use
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Q125
Open questionIn a low power factor wattmeter the compensating coil is connected
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Q126
Open questionWhich of the following devices may be used for extending the range of instruments ?
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Q127
Open questionThe operating voltage of a meggar is about
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Q128
Open questionWhich of the following brushes can be used for high values of current density ?
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Q129
Open questionWhich of the following is an advantage of hydrogen cooling?
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Q130
Open questionThe insulation between windings and grounded core and the insulation between the windings of the same phase is
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Q131
Open questionOperating torques in analogue instruments are
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Q132
Open questionThe principle on which vector voltmeter is based is
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Q133
Open questionWhich of the following is the major consideration to evolve a good design ?
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Q134
Open questionThe stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a
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Q135
Open questionWhich of the following problem arises in D.C. motors which are fed from thyristor bridge circuits ?
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Q136
Open questionThe cylindrical windings using circular conductors are used for current rating of
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Q137
Open questionThe forced oil and air circulation method is usual one for transformers of capacities
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Q138
Open questionIn an energy meter braking torque is produced to
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Q139
Open questionIn a portable instrument, the controlling torque is provided by
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Q140
Open questionIn a meggar controlling torque is provided by
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