Power Systems
A pin type insulator has 100 kV puncture voltage. If 10 kV flash over voltage occurred in a transmission line, then find the safety factor of insulator?

 0.1
 1000
 0.001
 10

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Power Systems
The advantage of hydro electric power station over thermal power station is

 the operation cost of hydro electric power station is low
 hydro electric power station can supply the power throughout the year
 the initial cost of hydro electric power station is low
 hydro electric station can be constructed at the place where the energy is required

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Power Systems
In hydroelectric power plants

 both operating and initial cost are high.
 both operating and initial cost are low.
 operating cost is high and initial cost is low.
  operating cost is low and initial cost is high.

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