Electrical Engineering MCQs

Page No. 312

Which of the following is usually not the generating voltage ?


a6.6 kV


b8.8 kV


c11 kV


d13.2 kV


View Answer 8.8 kV

As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only__________________?


a 31.25 percent of copper


b33.3 percent of copper


c66.7 percent of copper


d125 percent of copper



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


bone-third


cone-half


d twice


View Answer one-fourth

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


d100 percent


View Answer 50 percent

Large industrial consumers are supplied electrical energy at__________________?


a400 V


b11 kV


c66 kV


d400 kV


View Answer 11 kV

The spacing between phase conductors of a 220 kV line is approximately equal to________________?


a2 m


b 3.5 m


c 6 m


d8.5 m


View Answer 6 m

The minimum clearance between the ground and a 220 kV line is about_________________?


a4.3 m


b5.5 m


c7.0 m


d10.5 m


View Answer 7.0 m

The material commonly used for sheaths of underground cables is______________?


a lead


b rubber


ccopper


d iron


View Answer lead

The material generally used for armour of high voltage cables is_____________?


aaluminium


bsteel


c brass


dcopper


View Answer steel

In transmission lines the cross-arms are made of________________?


acopper


bwood


cR.C.C.


dsteel


View Answer steel

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