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Power Systems

Power Systems
For load flow studies, What are the quantities specified at load bus are

 δ and Q
 P and V
 P and Q
 V and δ

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Power Systems
The maximum demand of a consumer is 2 kW and corresponding daily energy consumption is 30 units. What is the corresponding load factor?

 62.5%
 25%
 75%
 50.5%

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

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

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Power Systems
To reduce the radio interference which line is/are transposed?

None of these
 either 1 or 2
 Power line
 Both power and telecommunication lines

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Power Systems
In a 4*4 Y bus matrix the number of non zero elements are 12. Find the sparsity of the system?

 0.75
 0.5
 0.25
 1

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Power Systems
An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

 7.25 pu
 2.5 pu
 3.75 pu
 4.28 pu

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