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Power Systems

Power Systems
The pickup value of relay is 6.5 Amp and fault current in relay coil is 39 Amp. Its plug setting multiplier is

 8 A.
  6 A.
 7 A.
 10 A.

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Power Systems
Find the characteristic impedance of a transmission line, if impedance is 16 Ω and admittance is 0.1 mâ„§?

 200 Ω
 320 Ω
 160 Ω
 400 Ω

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Power Systems
Pump storage schemes are used to improve

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

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Power Systems
A 3-phase breaker is rated at 2000 MVA, 33 kV, its making current will be

 49 kVA.
  89.22 kVA.
  35 kVA.
 70 kVA.

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Power Systems
What will be the ratio of the C.T. on the H.V side of a 3 - φ star / delta 33 / 11 kV transformer if the protecting CT on the LV side has a ratio of 300 : 5 ?

 150 : 4 / √3.
  200 : 5 / √3.
  100 : 5 / √3.
 120 : 6 / √3.

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Power Systems
Objectives of power system is/are

 Cost of electrical energy per KWh is to be minimum
 nether 1 nor 2
 both 1 and 2
 Rated voltage and frequency has to be supplied to the consumers

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