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Power Systems

Power Systems
Reflector nuclear reactor are made of

  beryllium.
 cast iron.
 boron.
 steel.

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Power Systems
A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠90° Ω, C = 0.5*10^-6∠90° â„§. Find the shunt reactor required for compensating ferranti effect?

 1500 Ω
 500 Ω
 2000 Ω
 3000 Ω

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Power Systems
Operator "a" rotates a vector

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

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Power Systems
Pump storage schemes are used to improve

 the power factor.
 the load factor.
  the plant capacity factor as well as the load factor of the power system.
 the diversity factor.

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Power Systems
For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence,

 this may either be a medium line or short line
 this must be a short line
 this expression is true for any line
None of these

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Power Systems
Which of the following statements is/are true? In case of parallel transmission lines

 fault current increases
 both 1 and 3
 fault current reduces
 stability increases

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