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Power Systems

Power Systems
Generation of of one watt needs about ______________ fission per second

 3.1.
  3.1 × 1010.
 3.1 × 107.
 3.1 × 106.

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Power Systems
A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead

 10%
 -6.92%
 6.92%
 -10%

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Power Systems
An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

 4.28 pu
 7.25 pu
 3.75 pu
 2.5 pu

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Power Systems
Which of the following insulator is practically used for railway crossings?

 pin insulator
 string insulator
 strain insulator
All of these

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Power Systems
A 4 bus power system consists of 4 transmission lines, then find the sparsity of Y bus matrix?

 0.4
 0.5
 0.25
 0.75

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Power Systems
Which power plant cannot have single unit of 100 MW capacity

 Nuclear power plant.
 Steam power plant.
  Diesel engine plant.
 Hydro electric power plant.

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