| 1. | In induction motor If we remove one phase for instance, two terminals will have 'Y' phase and one will have 'B' phase called ? | |
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AC dynamic Braking
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plugging
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cascade breaking
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increasing motor torque
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Report Question| 2. | In a capacitor start single-phase induction motor, the capacitor is connected ? | |
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in series with main winding
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in series with auxiliary winding
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in series with both the windings
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in parallel with auxiliary winding
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| 3. | If running winding of a single-phase induction motor is short circuited ? | |
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run slower
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spark at light loads
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draw excessive current and overheat
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None of these
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| 4. | Short-circuiter is used in ? | |
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repulsion induction motor
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repulsion motor
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repulsion start induction run motor
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None of these
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| 5. | Which of the following statements regarding repulsion-start induction motor is incorrect ? | |
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It requires more maintenance of commutator and other mechanical devices
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It makes quite a bit of noise on starting
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In fractional horse power motors, it has replaced the capacitor motors
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It is not easily reversed
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| 6. | In a two value capacitor motor, the capacitor used for running purposes is ? | |
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air capacitor
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paper spaced oil filled type
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ceramic type
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a.c. electrolytic type
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| 7. | Speed control of a universal motor is achieved by ? | |
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varying field flux with tapped field windings
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connecting rheostat in series
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applying variable voltage
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all of these methods
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| 8. | In any case, where the height of transmission tower is increased ? | |
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the line capacitance and inductance will not change
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the line capacitance and inductance will decrease
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the line capacitance will decrease and line inductance will increase
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the line capacitance will decrease but line inductance remain unchanged
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| 9. | For transmission lines, steel poles are generally used because: A. It has more mechanical strength and more life B. It occupies less space and give better appearance C. It has high cost ? | |
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Only A
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Only B
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Both A and B
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Only C
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| 10. | A synchronous generator generates reactive power while working at ? | |
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zero power factor
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lagging power factor
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leading power factor
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Any of these
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