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Power Systems

Power Systems
If the load is short circuited, then reflection coefficient of voltage is

 0
 1
 -2
 -1

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Power Systems
The draw back of NR method as compare to Gauss-Seidel method is/are?

None of these
 both 1 and 2
 large requirement of computer memory
 large number of iterations

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

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Power Systems
Bundled conductors in EHV transmission lines

 decrease capacitance
 increase capacitance
 increase inductance
 decrease inducatance

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Power Systems
Advantages of higher transmission voltage is/are

All of these
 Transmission line losses are reduced
 Power transfer capability of the transmission line is increased
 Area of cross section and volume of the conductor is reduced

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Power Systems
Which of the following is/are the stator faults?

 failure of excitation
All of these
 Inter phase faults
 over current

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