| 1. | The material commonly used for insulation in high voltage cables is ? | |
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lead
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paper
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rubber
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none of the above
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Report Question| 2. | The minimum clearance between the ground and a 220 kV line is about ? | |
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4.3 m
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5.5 m
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7.0 m
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10.5 m
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| 3. | A feeder, in a transmission system, feeds power to ? | |
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distributors
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generating stations
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service mains
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all of the above
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| 4. | Which of the following is not a constituent for making porcelain insulators ? | |
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Quartz
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Kaolin
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Felspar
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Silica
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| 5. | Which of the following are the constants of the transmission lines ? | |
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Resistance
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Inductance
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Capacitance
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All of the above
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| 6. | By which of the following methods string efficiency can be improved ? | |
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Using a guard ring
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Grading the insulator
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Using long cross arm
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Any of the above
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