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Power Systems

Power Systems
Ferranti effect occurs under

 full load
 half load
 any of the above
 no load

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

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

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Power Systems
A fault occurring at the terminals of an unloaded synchronous generator operating at its rated voltage has resulted in the following values of currents and voltages. IR0 = j 2.37 pu IR1 = -j 3.05 pu IR2 = j 0.68 pu VR0 = VR1 = VR2 = 0.237 pu. Which of the following faults has occurred?

 LLL
 LL
 LG
 LLG

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Power Systems
Which of the following is/are advantages of N-R method?

 Time taken for each iteration is less
 both 1 and 2
 Applicable for large power system network
 Number of iterations are less

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Power Systems
For a fixed value of complex power flow in a transmission line having a sending end voltage V, the real power loss will be proportional to

 V2.
  1 / V2.
 V.
 1 / V.

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Power Systems
Surge tank is kept very close to the

 generator
 spill way
 turbine
 pen stock

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