| 1. | If string efficiency is 100 percent it means that ? | |
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potential across each disc is zero
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potential across each disc is same
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one of the insulator discs is shorted
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none of the above
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Report Question| 2. | A synchronous condenser is generally installed at the of the transmission line ? | |
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receiving end
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sending end
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middle
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none of the above
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| 3. | Power system stability is least affected by ? | |
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reactance of generator
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input torque
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losses
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reactance of transmission line
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| 4. | When the load at the receiving end of a long transmission line is removed, the sending end voltage is less than the receiving end voltage. This effect is known as ? | |
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Ferranti effect
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Proximity effect
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Kelvin effect
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Faraday effect
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| 5. | Due to which of the following reasons aluminium is being favoured as busbar material ? | |
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Low density
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Low cost
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Ease of fabrication
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None of the above
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| 6. | By using bundle conductors, the critical voltage for the formation of corona will ? | |
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remain same
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decrease
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increase
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not occur
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| 7. | Solid grounding is adopted for voltages below ? | |
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100 V
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200 V
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400 V
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660 V
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| 8. | The electrostatic stress in underground cables is ? | |
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zero at the conductor as well as on the sheath
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same at the conductor and sheath
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minimum at the conductor and minimum at the sheath
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maximum at the conductor and minimum at the sheath
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| 9. | System grounding is done so that ? | |
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inductive interference between power and communication circuits can be controlled
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the floating potential on the lower voltage winding for a transformer is brought down to an insignificant value
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the arcing faults to earth would not set up dangerously high voltage on healthy phases
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for all above reasons
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| 10. | A lightning arrester is usually located nearer to ? | |
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transformer
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isolator
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busbar
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circuit breaker
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