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Power Systems

Power Systems
Rankine cycle efficiency of a steam power plant is of

  60 - 80 %.
  30 - 45 %.
  20 - 30 %.
  45 - 80 %.

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Power Systems
An ACSR conductor has internal inductance 0.05 mH/Km for µr = 1. If this ACSR is replaced with another having µr = 2, then find the internal inductance?

 0.1 mH/Km
 0.025 mH/Km
 0 mH/Km
 0.05 mH/Km

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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?

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

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Power Systems
A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base?

 0.2 pu
 0.1 pu
 0.4 pu
 0.5 pu

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Power Systems
To reduce the radio interference which line is/are transposed?

 either 1 or 2
None of these
 Power line
 Both power and telecommunication lines

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Power Systems
Area under the daily curve divided by 24 gives

 maximum demand
 average load
 maximum load
 units generated

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