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Power Systems

Power Systems
The sequence components of the fault current are as follows: IR1 = j1.5 pu, IR2 = -j0.5 pu, IR0 = -j1. The type of fault is

 LG
 LL
 LLL
 LLG

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Power Systems
String chart is drawn between

 temperature (T) on X- axis, sag(S) and tension (T) on Y-axis
 nether 1 nor 2
 T on Y-axis and S and T on on X-axis
 both 1 and 2

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Power Systems
Which of the following is an impulse turbine

  Francis turbine.
  Pelton turbine.
  Kaplan turbine.
  None of above.

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Power Systems
Advantages of gauss siedel method is/are

 number of iterations are less
 applicable for large power system network
 calculation time for each iteration is less
All of these

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Power Systems
Operating time of pumped storage plant is

 low
 high
 very high
 can't say

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Power Systems
A Pelton wheel turbine having a rated speed of 300 rpm is connected to an alternator to produce power at 50 Hz. The number of poles required in the alternator is

 4
 10
 20
 8

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