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Power Systems

Power Systems
Mho relay is used for protection of

  short lines.
  none of these.
  long lines.
  medium lines.

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Power Systems
The maximum demand of a consumer is 2 kW and corresponding daily energy consumption is 30 units. What is the corresponding load factor?

 50.5%
 75%
 25%
 62.5%

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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 Charging current under no load?

 0.344∠90° A/phase
 0.144∠90° A/phase
 0.512∠90° A/phase
 1.144∠90° A/phase

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Power Systems
Which of the following is a reaction turbines

  Francis turbine and Kaplan turbine.
  Pelton turbine and Francis turbine.
  Kaplan and Pelton turbine.
  None of these.

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

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Power Systems
Attenuation occurs due to

 conductance
 resistance
 inductance
 both 1 and 3

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