| 1. | By which of the following methods the protection against direct lightning strokes and high voltage sweep waves is provided ? | |
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Lightening arresters
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Ground wire
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Lightening arrestera and ground wires
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Earthing of neutral
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Report Question| 2. | Poles which carry transformers are usually ? | |
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circular
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I-type
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A-type
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H-type
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| 3. | In a 70/6 AC. S.R. conductor there are ? | |
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35 aluminium conductors and 3 steel conductors
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70 aluminium conductors and 6 steel conductors
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70 steel conductors and 6 aluminium conductors
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none of the above
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| 4. | The material used for the manufacture of grounding wires is ? | |
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cast iron
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aluminium
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stainless steel
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galvanised steel
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| 5. | The effective resistance of a conductor will be the same as 'ohmic resistance when ? | |
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power factor is unity
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current is uniformly distributed in the conductor cross-section
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voltage is low
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current is in true sine wave form
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| 6. | Floating neutral, in 3-phase supply, is undesirable because it causes ? | |
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low voltage across the load
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high voltage across the load
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unequal line voltages across the load
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none of the above
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| 7. | The surge resistance of cables is ? | |
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20 ohms
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50 ohms
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200 ohms
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300 ohms
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| 8. | Resistance grounding is used for voltage between ? | |
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3.3 kV to 11 kv
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11 kV to 33 kV
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33 kV to 66 kV
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none of the above
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| 9. | A booser is connected in ? | |
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parallel with earth connection
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parallel with the feeder
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series with the feeder
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series with earth connection
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| 10. | In the analysis of which of the following lines shunt capacitance is neglected ? | |
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Short transmission lines
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Medium transmission lines
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Long transmission lines
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Medium as well as long transmission lines
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