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Power Systems

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

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

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Power Systems
The radiation shield for a nuclear power reactor for biological safety is provided by having the reactor

 isolated from outside word with strong magnetic field.
 immersed in water pool.
 encased thick metal wall.
  encased by thick concrete wall.

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Power Systems
Two generating stations delivering a powers of P1 = 150 MW, P2 =100 MW and the B coefficients are B11 = 0.005, B22 = 0.002, B12=B21= -0.001. Find the transmission line losses?

 102.5
 95.5
 85.5
 105.2

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Power Systems
Keeping in view the cost and overall effectiveness, the following circuit breaker is suited for capacitor bank switching

  SF6.
  vacuum.
  oil.
  air blast.

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Power Systems
A power station supplies the peak load of 50 MW, 40 MW and 70 MW to three localities. The annual load factor is 0.50 p.u. and the diversity factor of the load at the station is 1.55 the maximum demand on the station and average load respectively will be

 52 MW.
 57.5 MW.
 53 MW.
  51.61 MW.

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Power Systems
Which of the following is/are the effects of corona

 power loss decreases
All of these
 interference decreases
 charging current increases

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