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Power Systems

Power Systems
In which of the following given faults, all the sequence currents are equal?

 LG
 LLG
 LLL
 LL

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Power Systems
A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero?

 31.28 kV
 30.28 kV
 28.28 kV
 29.28 kV

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Power Systems
Which of the following transmission line is most practically used in load flow analysis?

 either 1 or 2
 Nominal ∏
 Nominal T
 nether 1 nor 2

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Power Systems
Stock bridge dampers are used to

 reduce the vibrations at the point of support
All of these
 reduce the tension
 increase the sag

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Power Systems
Making current is a------------ value?

 RMS
 peak value
 average
 any of the above

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Power Systems
Units of incremental cost is

 Rs/MWhr
 Rs/hr
 RsMW/hr
 MWhr/Rs

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