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Power Systems

Power Systems
Length of short transmission line is up to

 80 km
 150 km
 40 km
 any of the above

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Power Systems
If a 500 MVA, 11 kV 3-phase generator at 50 Hz feeds through a transfer impedance of (0+j0.605) Ω/phase, an infinite voltage also at 11 kV, then the maximum steady state power transfer on the base of 500 MVA and 11 kV is

 0.4 pu
 1 pu
 0.5 pu
 0.8 pu

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Power Systems
Cheapest plant in operation and maintenance is

  steam power.
  nuclear.
  diesel power.
  hydroelectric.

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Power Systems
What is the function of economiser in steam boilers

All of these
 cooling
 collect ash particals
 improving thermal efficiency

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Power Systems
Which of the following is/are base load plants?

 nuclear plants
All of these
 hydro plants
 thermal plants

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Power Systems
In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is

 500 Ω
 25 Ω
 1000 Ω
 250 Ω

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