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Power Systems

Power Systems
Lightning arresters are made up of which material?

 silicon oxide
 silver
 copper
 any of the above

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Power Systems
The daily energy produced in thermal power station is 720 MWh at a load factor of 0.6. What is the maximum demand of the station?

 72 MW
 50 MW
 720 MW
 30 MW

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Power Systems
At slack bus, which one of the following combinations of variables is not specified?

 P and Q
 Q and V
 V and δ
 P and V

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Power Systems
Which of following materials can be used as coolant

 Heavy water.
 Helium.
 CO2.
  Any of above.

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Power Systems
Units of incremental cost is

 Rs/MWhr
 Rs/hr
 MWhr/Rs
 RsMW/hr

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Power Systems
Which of the following represents the transmission line positive sequence reactance

 Xm - Xs
 Xs - Xm
 2Xs + Xm
 Xs +2 Xm

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