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ELECTRICIAN---AGRICULTURE Related Question Answers
3. Whenever two charges are separated there exist:
Magnetic field Electric field Electrostatic field Emf
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4. Why accumulators are preferred to pmy cell in motor car?
They are bulk They have high internal resistance They can be recharged All the above
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8. Repulsion motor is provided with
Commutator Centrifugal switch Capacitor Squirrel cage rotor
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9. Whenever a poly phase motor is loaded the :
induced emf in the rotor increases and its frequency falls induced emf in the rotor increases and its frequency rises induced in the rotor remains constant induced emf in the rotor decreases and its frequency increases
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10. For three resistance are connected in three phase, the power consumed will be more in__________connection.
star delta star delta delta-star
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11. Synchronous motors run on leading power factor when connected in :
under excitation rated excitation fullv loaded over excitation
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15. In induction motor percentage slip is maximum at :
low speed medium speed stand still condition synchronous speed
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16. The crawling in an induction motor is caused by :
improper design of the machine low voltage supply high load harmonics developed in the motor
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18. Reduction in the capacitance of capacitor start motor results in reduced :
noise starting torque speed armature reaction
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19. In an ac circuit the ratio of kW/kVA represents :
power factor load factor starting torque diversityfactor
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22. Centrifugal sw itches is provided for disconnecting the auxiliary winding in a :
capacitor run motor capacitor start motor reluctance motor hysteresis motor
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23. Transformer core is laminated to :
reduce the copper loss reduces the eddycurrent loss reduces the core loss hysteresis loss
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24. Which type of loss is not common to transformer and rotating machines ?
eddy current loss copper loss hysteresis loss windage loss
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25. The difference between the synchronous speed and the actual speed of an induction motor is known as :
slip regulation black lash lag
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