Power System 1

Single line diagram does not represents:

• Ratings of machines

• Neutral wire of transmission lines

• Delta connection of transformer winding

• Star connection of transformer winding

Most of the high-voltage transmission lines are

• Underground

• Overhead

• Either of the above

• None of the above

Which of the following is the main field of application of pin type insulator?

• Distribution system

• Transmission system

• Transmission and distribution system

• All of these

The distributors for residential areas are

• Single phase

• Three phase three wire

• Three phase four wire

• None of the above

The contactors of the overhead lines are

• Solid

• Stranded

• Both solid and stranded

• None of the above

Only advantage of corona is that it

• Produces a pleasing luminous glow

• Makes line current sinusoidal

• Works as a safety valve for surges

• Ozone gas is produced

A feeder in a transmission system feeds power to

• Distributors

• Generating stations

• Service mains

• All of the above

Which of the following material is used for overhead transmission lines?

• Still cored aluminium

• Galvanised steel

• Cadmium copper

• Any of the above

Which of the following characteristics should the line supports for transmission line possess ?

• Low-cost

• High mechanical strength

• longer life

• all of the above

Which of the following distribution system is more reliable?

• Radial system

• Tree system

• Ring main system

• All are equally reliable