If an insulating material is operated beyond the maximum allowable temperature, its life is
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Electrical Engineering · all questionsElectrical Machine Design
Electrical Machine Design
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Which of the following materials is used in the manufacture of resistance grids to be used in the starters of largemotors ?
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Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to
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Standard resistor is made from
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A dynamometer wattmeter can be used for
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An induction wattmeter can be used for
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Basically a potentiometer is a device for
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A potentiometer may be used for
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When the two coil sides forming a coil are spaced exactly one pole pitch apart they are said to be of
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Which of the following methods may be adopted to reduce the effects of armature reaction?
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The heated parts of an electrical machine dissipate heat into their surroundings by which of the followingmodes of heat dissipation ?
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The action of electromagnetic machines can be related to which of the following basic principles ?
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Which of the following properties a damping oil must possess ?
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In transformers using hot rolled steel, the cross-section of the yoke is made about _____ greater than that of the core
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An induction meter can handle current up to
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_______ is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ?
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In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of
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Multiple inlet system of air cooling of turbo-alternators can be used for machines of rating upto
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The household energy meter is
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Q100
Open questionThe flash point of transformer oil should be higher than
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