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Power Systems

Power Systems
The Y bus matrix of 100 bus interconnected system is 90% sparse. Hence the number of transmission lines in the system must be

 250
 900
 450
 500

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Power Systems
The pickup value of relay is 6.5 Amp and fault current in relay coil is 39 Amp. Its plug setting multiplier is

 7 A.
 8 A.
  6 A.
 10 A.

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Power Systems
Suspension type insulators are used for voltage beyond

 11 kV
 33 kV
 440 V
 230 V

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Power Systems
Objectives of power system is/are

 nether 1 nor 2
 both 1 and 2
 Rated voltage and frequency has to be supplied to the consumers
 Cost of electrical energy per KWh is to be minimum

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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
 500 MVA
 100 MVA
 400 MVA

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Power Systems
In transmission lines distribution constants are

 inductance and resistance
 resistance
 inductance and capacitance
 both 1 and 2

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