| 1. | Permanent magnet excitation is also known as ? | |
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shunt excitation
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series excitation
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separate excitation
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compound excitation
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Report Question| 2. | The functions of inter poles are ? | |
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nullify reactance voltage
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reduce cross magnetization effect
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nullify reactance voltage and reduce cross magnetization effect both
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None of these
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| 3. | A 10KVA auto transformer, turn ratio is 0.4. Find the power transferred inductively ? | |
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4kVA
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6kVA
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10kVA
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0kVA
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| 4. | On Parallel operation of two or more transformers the percentage impedance of transformers should be ? | |
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Such that actual impedance of all transformers would be same
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same
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proportionate to MVA rating of transformers
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inversely proportional to MVA rating of transformers
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| 5. | The power is supplied to the rotating device in an induction motor is by means of ? | |
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Electromagnetic induction
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Magnetic induction
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Ferro Magnetic induction
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Faraday's law of electromagnetic induction
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| 6. | The principle of operation of a 3-phase induction motor is most similar to that of ? | |
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synchronous motor
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capacitor-start induction run motor
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repulsion-start induction motor
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transformer with a shorted secondary
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| 7. | If the supply frequency to the stator is reduced the Induction motor goes to ? | |
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increase the torque
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Regenerative braking
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stator magnetic breaking
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increasing speed of rotor
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| 8. | The direction of rotation of hysteresis motor is reversed by ? | |
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Shift shaded pole with respect to main pole
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Reversing supply lead
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Either A or B
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Neither A nor B
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| 9. | If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then ? | |
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motor will not come upto speed
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motor will not carry the load
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current drawn by the motor will be excessively high
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electrolytic capacitor will, in all probability, super break down
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| 10. | In a capacitor start single-phase motor, when capacitor is replaced by a resistance ? | |
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torque will increase
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the motor will consume less power
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motor will run in reverse direction
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motor will continue to run in same direction
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