Power Systems
A generating station which has a high investment cost and low operating cost is usually operated as a

 None of above.
 Base load station.
 Peak load station.
 Minimum load station.

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Power Systems
Critical mass is

 a mass of fissionable material required to stop a chain reaction.
  minimum mass of fissionable material required to sustain chain reaction.
 none of these.
 maximum mass of fissionable material required to sustain a chain reaction.

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Power Systems
The value of off diagonal elements is

 sum of admittances connected at bus j
 which is connected between bus i and bus j with positive sign
 which is connected between bus i and bus j with negative sign
 sum of admittances connected at bus i

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