| 1. | The underground system cannot be operated above ? | |
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440 V
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11 kV
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33 kV
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66 kV
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Report Question| 2. | Which of the following materials is not used for transmission and distribution of electrical power ? | |
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Copper
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Aluminium
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Steel
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Tungsten
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| 3. | The phenomenon of rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the ? | |
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Seeback effect
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Ferranti effect
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Raman effect
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none of the above
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| 4. | The square root of the ratio of line impedance and shunt admittance is called the ? | |
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surge impedance of the line
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conductance of the line
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regulation of the line
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none of the above
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| 5. | Which of the following is the source of heat generation in the cables ? | |
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Dielectric losses in cable insulation
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I2R losses in the conductor
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Losses in the metallic sheathings and armourings
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All of the above
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| 6. | Most of the high voltage transmission lines in India are ? | |
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underground
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overhead
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either of the above
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none of the above
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| 7. | Multicore cables generally use ? | |
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square conductors
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circular conductors
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rectangular conductors
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sector-shaped conductors
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| 8. | The conductors of the overhead lines are ? | |
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solid
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stranded
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both solid and stranded
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none of the above
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| 9. | Which of the following is the demerit of a constant voltage transmission system ? | |
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Increase of short-circuit current of the system
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Availability of steady voltage at all loads at the line terminals
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Possibility of better protection for the line due to possible use of higher terminal reactance
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Improvement of power factor at times of moderate and heavy loads
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| 10. | The corona is considerably affected by which of the following ? | |
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Size of the conductor
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Shape of the conductor
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Surface condition of the conductor
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All of the above
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