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Electrical Machines

Electrical Machines
Flux density under leading pole tips in case of generator will

 either increase or decrease
None of these
 increase
 decrease

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Electrical Machines
Which machine is used for battery charging?

 Compounded DC generator.
 DC series generator.
 DC shunt generator.
 None of these.

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Electrical Machines
If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will

 start automatically without trouble.
 develop very low starting torque.
 not start automatically.
 get damaged.

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Electrical Machines
Which of the following motors has low ratings only?

 Capacitor run
 Shaded pole
 Capacitor start
 Resistance split phase

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Electrical Machines
To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used.

 any of above method.
 Ward Leonard control.
 rheostatic control.
 none of above.

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Electrical Machines
Diverters are used only in

None of these
 series motors
 either of these
 shunt motors

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