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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

 450
 250
 500
 900

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Power Systems
An ACSR conductor has internal inductance 0.05 mH/Km for µr = 1. If this ACSR is replaced with another having µr = 2, then find the internal inductance?

 0 mH/Km
 0.1 mH/Km
 0.05 mH/Km
 0.025 mH/Km

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Power Systems
If the diameter of the conductor is increased

 the inductance is decreased
 the inductance is increased
 no change in inductance and resistance
 the resistance is increased

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Power Systems
Main bus bar protection scheme is /are

  both fault bus and differential protection.
  differential protection.
  fault bus protection.
  none of these.

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Power Systems
The value of diversity factor is

 less than 1
 0
 greater than 1
 1

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Power Systems
Condition for maximum voltage regulation

 tanφ = R/X
 tanφ = X/R
 cosφ = R/X
 cosφ = X/R

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