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Power Systems

Power Systems
Length of short transmission line is up to

 any of the above
 150 km
 80 km
 40 km

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Power Systems
Which of the following is/are the disadvantages of phase modifiers?

 It requires more maintenance because of running equipment
 It consumes both active and reactive power
 Initial cost of synchronous phase modifier is higher
All of these

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Power Systems
Maximum efficiency of modern coal fired steam raising thermal power plants is restricted to about 035 (a low value), mainly because of

 low alternative efficiency.
 low steam turbine mechanical efficiency.
  high energy loss from turbine exhaust to condenser.
 high energy loss in boiler.

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Power Systems
On what factor does the performance of a circuit breaker depend?

  Both A and C.
  None of these.
  Breaking speed.
 Critical length of breaking.

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Power Systems
In a two plant system, the load is connected to plant number 2. The loss coefficients are

 B11,B22,B12 are non zeros
 B11,B22 are non zero,B12 = 0
 B11,B12 are non zero ,B22 = 0
 B11 is non zero,B22 = B12 = 0

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Power Systems
Which of the following transmission line is most practically used in load flow analysis?

 Nominal T
 either 1 or 2
 nether 1 nor 2
 Nominal ∏

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