| 1. | By pushing and pulling the rotor shaft of a motor, we can check its ? | |
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end play
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side play
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firmness of mounting
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free shaft movement
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Report Question| 2. | When a D.C. series motor is connected to AC. supply, the power factor will be low because of ? | |
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high inductance of field and armature circuits
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induced current in rotor due to variations of flux
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fine copper wire winding
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none of the above
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| 3. | ln case of high speed universal motor which of the following needs more attention ? | |
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End play
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Air gap
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Insulation in rotor
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Balancing of rotor
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| 4. | In A.C. series motor compensating winding is employed to ? | |
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reduce the effects of armature reaction
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increase the torque
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reduce sparking at the brushes
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none of the above
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| 5. | The range of efficiency for shaded pole motors is ? | |
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50% to 75%
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80% to 90%
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50% to 75%
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5% to 35%
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| 6. | In repulsion motor direction of rotation of motor ? | |
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is opposite to that of brush shift
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is the same as that of brush shift
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is independent of brush shift
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all of the above
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| 7. | 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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| 8. | In which single-phase motor, the rotor has no teeth or winding ? | |
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Split phase motor
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Reluctance motor
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Hysteresis motor
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Universal motor
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| 9. | The motor used for the compressors is ? | |
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DC series motor
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shaded pole motor
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Capacitor-start capacitor-run motor
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reluctance motor
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| 10. | Which of the following motors is used in a situation where load increases with speed ? | |
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Induction motor
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3 phase series motor
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Schrage motor
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Hysteresis motor
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