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Power Systems

Power Systems
Which of the following is/are base load plants?

 nuclear plants
 hydro plants
 thermal plants
All of these

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Power Systems
If the breakdown voltage of the insulator is high, the thickness of the insulator is

 it does not related to breakdown voltage
 high
None of these
 less

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Power Systems
Surge impedance loading of a transmission line can be increased by

 both 1 and 3
 addition of lumped capacitance in series
 increasing its voltage level
 addition of lumped inductance in parallel

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Power Systems
The positive, negative and zero sequence per unit impedance of two generators connected in parallel are X1 = 0.12 pu, X2 = 0.096 pu and X0 = 0.036 pu. For LG fault at generator terminals (with 1 pu voltage) the positive sequence current will be

 10.936 pu
 8.936 pu
 7.936 pu
 9.936 pu

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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. The plant capacity factor for the station is

 0.5
 0.75
 1
 0.6

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Power Systems
An isolated synchronous generator with transient reactance equal to 0.1 pu on a 100 MVA base is connected to the high voltage bus through a step up transformer of reactance 0.1 pu on a 100 MVA base. The fault level at the bus is

 200 MVA
 100 MVA
 500 MVA
 400 MVA

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