A uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is______________? A. one-fourth B. one-third C. one-half D. twice E. none…

Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is____________________? A. 25 percent B. 50 percent C. 75 percent D. 100 percent

Large industrial consumers are supplied electrical energy at__________________? A. 400 VB. 11 kV C. 66 kV D. 400 kV

The spacing between phase conductors of a 220 kV line is approximately equal to________________? A. 2 m B. 3.5 m C. 6 m D. 8.5 m

The minimum clearance between the ground and a 220 kV line is about_________________? A. 4.3 m B. 5.5 m C. 7.0 m D. 10.5 m

The material commonly used for sheaths of underground cables is______________? A. lead B. rubber C. copper D. iron

The material generally used for armour of high voltage cables is_____________? A. aluminium B. steel C. brass D. copper

In transmission lines the cross-arms are made of________________? A. copper B. wood C. R.C.C. D. steel

Overhead lines generally use__________________? A. copper conductors B. all aluminium conductors C. A.C.S.R. conductors D. none of these

The power factor of industrial loads is generally______________? A. unity B. lagging C. leading D. zero