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Power Systems

Power Systems
Which of the following materials is/are used as moderators?

 heavy water
 graphite
 beryllium
All of these

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Power Systems
Telecommunication lines are transposed to reduce the

 efficiency
 voltage level
All of these
 radio interference in communication lines

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Power Systems
Equal area criterion gives the information regarding

 stability region
 absolute stability
 swing curves
 relative stability

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Power Systems
A guard ring is used in string type insulator having 3 units to improve string efficiency. Find the capacitance of metal link 2 if pin to earth capacitance of each unit is 1 F?

 2 F
 1 F
 0.5 F
 4 F

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Power Systems
Surge impedance loading (SIL) is represented by

 both 1 and 2
 Vl²*√(C/L)
 Vl²/Zs
 Vph²/Zs

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Power Systems
IF the time of operation of a relay for unity TMS is 10 sec then the time of operation for 0.5 TMS is

 20 sec.
  5 sec.
 none of these.
 10 sec.

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