| 1. | Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical ? | |
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Static condenser
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Synchronous condenser
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Tap changing transformer
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Booster transformer
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Report Question| 2. | Transmission voltage of 11 kV is normally used for distances upto ? | |
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20-25km
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40-50km
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60-70 km
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80-100km
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| 3. | Which of the following distribution systems is more reliable ? | |
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Radial system
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Tree system
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Ring main system
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All are equally reliable
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| 4. | The steel used in steel cored conductors is usually ? | |
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alloy steel
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stainless steel
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mild steel
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all of the above
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| 5. | ln AC. S.R. conductor the function of steel is to ? | |
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provide additional mechanical strength
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prevent corona
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take care of surges
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reduce inductance and subsequently improve power factor
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| 6. | Which of the following has least effect on corona ? | |
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Atmospheric temperature
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Number of ions
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Size and charge per ion
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Mean free path
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| 7. | Power loss due to corona is not directly proportional to ? | |
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spacing between conductors
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supply voltage frequency
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phase-neutral voltage
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all of the above
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| 8. | Which of the following are connected by the service mains ? | |
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Transformer and earth
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Distributor and relay system
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Distributor and consumer terminals
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Distributor and transformer
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| 9. | Impedance relay is used on transmission lines ? | |
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short
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medium
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long
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all
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| 10. | Conductors for high voltage transmission lines are suspended from towers to ? | |
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increase clearance from ground
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clearance from ground
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take care of extension in length during summer
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reduce wind and snow loads
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