Overhead system can be designed for operation up to____________?

When a live conductor of public electric supply breaks down and touches the earth which of the following will happen?

A. Current will flow to earth
B. Supply voltage will drop
C. Supply voltage will increase
D. No current will flow in the conductor
E. None of the above

Galvanised steel wire is generally used as______________?

A. stay wire
B. earth wire
C. structural components
D. all of the above

The power factor of industrial loads is generally______________?

A. unity
B. lagging
C. leading
D. zero

On which of the following factors skin effect depends?

A. Frequency of the current
B. Size of the conductor
C. Resistivity of the conductor material
D. All of the above

A circuit is disconnected by isolators when____________?

A. line is energized
B. there is no current in the line
C. line is on full load
D. circuit breaker is not open

type insulators are generally not used for voltages beyond_________?

A. 1 kV
B. 11 kV
C. 22 kV
D. 33 kV