| 1. | A.C. network analyser is used to solve problems of ? | |
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load flow
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load flow and short-circuit
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load flow and stability
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load flow, short-circuit and stability
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Report Question| 2. | .......... relays are used for phase faults on long line ? | |
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impedance
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Reactance
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Either of the above
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None of the above
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| 3. | For which of the following protection from negative sequence currents is provided ? | |
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Generators
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Motors
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Transmission line
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Transformers
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| 4. | Which of the following devices will receive voltage surge first travelling on the transmission line ? | |
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Lightning arresters
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Relays
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Step-down transformer
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Switchgear
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| 5. | If the fault occurs near the impedance relay, the V/I ratio will be ? | |
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constant for all distances
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lower than that of if fault occurs away from the relay
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higher than that of if fault occurs away from the relay
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none of the above
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| 6. | A fuse is connected ? | |
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in series with circuit
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in parallel with circuit
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either in series or in parallel with circuit
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none of the above
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| 7. | The fuse rating is expressed in terms of ? | |
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current
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voltage
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VAR
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kVA
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| 8. | Oil switches are employed for ? | |
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low currents circuits
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low voltages circuits
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high voltages and large currents circuits
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all circuits
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| 9. | A short-circuit is identified by ? | |
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no current flow
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Heavy current flow
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voltage drop
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voltage rise
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| 10. | The information to the circuit breaker under fault conditions is provided by ? | |
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relay
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rewirable fuse
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H.R.C. only
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all of the above
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