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Power Systems

Power Systems
Attenuation occurs due to

 inductance
 resistance
 conductance
 both 1 and 3

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Power Systems
The power generated by two plants are; P1 = 50 MW, P2 = 40 MW. If the loss coefficients are B11 = 0.001, B22 = 0.0025 and B12 = -0.0005, then power loss will be

 6.5 MW
 8.5 MW
 4.5 MW
 5.5 MW

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Power Systems
Which type of connection is employed for current transformers for the protection of star- delta connected 3-phase transformer?

 star-star
 delta-delta
 delta-star
 star-delta

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Power Systems
A 200 MW capacity generator has a speed regulation of 4% for a frequency drop of 0.05 Hz. Find the power input supplied by the turbine for maintaining constant frequency?

 20 MW
 10 MW
 15 MW
 5 MW

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Power Systems
Transmission lines are transposed to reduce

 ferranti effect
 proximity effect
 skin effect
 interference with neighbouring communication lines

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Power Systems
The per unit impedance of a circuit element is 0.30. If the base kV and base MVA are halved, then the new value of the per unit impedance of the circuit element will be

 0.30
 0.0060
 0.60
 0.0030

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