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Power Systems

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

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

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Power Systems
The positive, negative and zero sequence per unit impedance of two generators connected in parallel are X1 = 0.12 pu, X2 = 0.096 pu and X0 = 0.036 pu. For LG fault at generator terminals (with 1 pu voltage) the positive sequence current will be

 7.936 pu
 10.936 pu
 9.936 pu
 8.936 pu

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Power Systems
Operator "a" rotates a vector

 clock wise direction
 nether 1 nor 2
 either 1 or 2
 anti clock wise direction

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Power Systems
The specific speeds of Kaplan, Francis and Pelton turbines are in

 the increasing order.
  the decreasing order.
None of these
 neither increasing nor decreasing order.

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Power Systems
For distortion less line which of following relation are true

 R = O, G = O.
 R/L = G/C.
 None of above.
 R/L = C/G.

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Power Systems
Graphite is use din nuclear plant as a / an

 coolant.
  moderator.
 fuel.
 electrode.

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