| 1. | In a ceiling fan employing capacitor run motor ? | |
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secondary winding surrounds. The primary winding
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primary winding surrounds the secondary winding
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both are usual arrangements
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none of the above
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Report Question| 2. | Which of the following motors is generally used for electric shavers ? | |
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Universal motor
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Shaded-pole motor
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Reluctance motor
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Hysteresis motor
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| 3. | Reluctance motors are ? | |
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singly excited
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doubly excited
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either of the above
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none of the above
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| 4. | Which of the following motors is generally used in toys ? | |
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Reluctance motor
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Hysteresis motor
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Shaded-pole motor
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Two-value capacitor motor
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| 5. | Speed control of a universal motor is achieved by ? | |
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varying field flux with tapped field windings
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applying variable voltage by means of variable auto-transformer
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connecting rheostat in series
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all of the above methods
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| 6. | Most of the 'fractional horsepower motors have either ? | |
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hard and annealed bearings
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ball or roller bearings
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soft and porous bearings
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plain or sleeve bearings
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| 7. | 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 up to 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, suffer break down
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| 8. | The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it ? | |
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improves the efficiency
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helps the rotor teeth to remain under the stator teeth
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Helps in reducing the tendency of the rotor teeth to remain under the stator teeth
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improves the power factor
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| 9. | Which type of load is offered by cranes and hoists ? | |
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Gradually varying load
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Non-reversing, no-load start
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Reversing, light start
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Reversing, heavy start
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| 10. | Single phase induction motor usually operates on ? | |
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0.6 power factor lagging
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0.8 power factor lagging
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0.8 power factor leading
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unity power factor
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