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Power Systems

Power Systems
For n bus power system size of Y bus matrix is

 (n-1)×(n-2)
 (n-2)×(n-2)
 (n-1)×(n-1)
 n×n

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Power Systems
Counter poise is used for

 reduce losses
 proper discharging of lighting surges
 less surge impedance
 more surge impedance

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Power Systems
A cable has the following characteristics, L = 0.201 µH/m and C = 196.2 pF/m. The velocity of wave propagation through cable is

 159.24 m/µs
 0.0312 m/s
 159.24 m/s
 32 m/s

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Power Systems
Which of the following power plants can generate power at unpredictable or uncontrollable time

 Pulverising unit.
 Wind turbine.
 Condenser.
 Cooling tower.

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Power Systems
Which of the following is/are the effects of corona

 power loss decreases
All of these
 interference decreases
 charging current increases

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Power Systems
A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. If the load factor is 0.8. Find the reserve capacity of the station?

 5 MW
 18 MW
 10 MW
 9 MW

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