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Power Systems

Power Systems
Normally Z bus matrix is a

 sparse matrix
 full matrix
 null matrix
 unit matrix

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Power Systems
In triangular configuration, inductance and capacitance values are ------ and ------ respectively

 higher, higher
 higher, less
 less, higher
 less, less

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Power Systems
The inductance of single phase two wire line is given by

 0.4×10-7× ln(r'/d) H/m
 4×10-7× ln(r'/d) H/m
 0.4×10-7× ln(d/r') H/m
 4×10-7× ln(d/r') H/m

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Power Systems
Pump storage schemes are used to improve

 the power factor.
 the diversity factor.
 the load factor.
  the plant capacity factor as well as the load factor of the power system.

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Power Systems
The corona loss on a particular system at 60 Hz is 1 kW/km per phase. What is the corona loss at 50 Hz in kW/km per phase?

 0.882
 1.13
 0.93
 1

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Power Systems
Bundled conductors in EHV transmission lines

 increase inductance
 increase capacitance
 decrease inducatance
 decrease capacitance

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