| 1. | more than 100 or 1000 ? | |
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mutual induction
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static induction
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self induction
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dynamic induction
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Report Question| 2. | A transformer transforms ? | |
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voltage
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current
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current and voltage
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power
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| 3. | Transformer rating are usually expressed in terms of ? | |
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kVA
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kW
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kWh
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kVAR
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| 4. | During open circuit test of a transformer ? | |
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primary is supplied rated voltage
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primary is supplied full-load current
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primary is supplied current at reduced voltage
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primary is supplied rated kVA
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| 5. | A step-up transformer increases ? | |
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power
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current
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voltage
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frequency
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| 6. | A transformer can have regulation closer to zero ? | |
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on full-load
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on overload
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on leading power factor
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on zero power factor
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| 7. | Short circuit test on transformers is conducted to determine ? | |
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hysteresis losses
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copper losses
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core losses
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eddy current losses
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| 8. | The noise produced by a transformer is termed as ? | |
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zoom
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Hum
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ringing
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buzz
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| 9. | Which of the following is the most likely source of harmonics in a transformer ? | |
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Poor-insulation
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Overload
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Loose connections
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Core saturation
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| 10. | The type of load for which the voltage regulation of a transformer is negative is ? | |
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capacitive
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inductive
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resistive
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none of the above
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