Structure of Power System

__________ are the conductors, which connect the consumer’s terminals to the distribution

• Distributors

• Service mains

• Feeders

• Substation

The underground system cannot be operated above

• 440 V

• 11 kV

• 33 kV

• 66 kV

Which of the following D.C. distribution system is the simplest and lowest in first cost ?

• Radial system

• Ring system

• Inter-connected system

• None of the above

The voltage of the single phase supply to residential consumers is

• 110 V

• 210 V

• 230 V

• 400 V

The distributors for residential areas are

• Single phase

• Three-phase three wire

• Three-phase four wire

• Two-wire

The power factor of industrial loads is generally

• unity

• lagging

• leading

• zero

Transmission line insulators are made of

• glass

• porcelain

• iron

• P.V.C.

Large industrial consumers are supplied electrical energy at

• 400 V

• 11 kV

• 66 kV

• 400 kV

Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is

• 25 percent

• 50 percent

• 75 percent

• 100 percent

A uniformly-loaded D.C. distributor is fed at both ends with equalvoltages. As compared to a similar distributor fed at one end only, the drop atthe middle point is

• one-fourth

• one-third

• one-half

• twice