Which of the following is usually not the generating voltage ?

A 3-phase 4 wire system is commonly used on________________?

A. primary transmission

B. secondary transmission

C. primary distribution

D. secondary distribution

There is a greater possibility of occurence of corona during______________?

A. dry weather

B. winter

C. summer heat

D. humid weather

E. none of the above

Which of the following is not a constituent for making porcelain insulators ?

A. Quartz

B. Kaolin

C. Felspar

D. Silica

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

A. Steel cored aluminium

B. Galvanised steel

C. Cadmium copper

D. Any of the above

The power transmitted will be maximum when____________?

A. corona losses are minimum

B. reactance is high

C. sending end voltage is more

D. receiving end voltage is more