Electrical Engineering Mcqs Practice Test

Question 1

The power transmitted will be maximum when____________?

Accepted Answer

A. corona losses are minimum

Question 2

A feeder, in a transmission system, feeds power to________________?

Accepted Answer

A. distributors

Question 3

The presence of ozone due to corona is harmful because it________________?

Accepted Answer

B. corrodes the material

Question 4

For an overhead line, the surge impedance is taken as________________?

Accepted Answer

C. 100—200 ohms

Question 5

Which of the following is usually not the generating voltage ?

Accepted Answer

B. 8.8 kV

Question 6

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

Accepted Answer

A. 31.25 percent of copper

Question 7

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______________?

Accepted Answer

A. one-fourth

Question 8

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

Accepted Answer

B. 50 percent

Question 9

Large industrial consumers are supplied electrical energy at__________________?

Accepted Answer

B. 11 kV

Question 10

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

Accepted Answer

C. 6 m

Question 11

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

Accepted Answer

C. 7.0 m

Question 12

The material commonly used for sheaths of underground cables is______________?

Accepted Answer

A. lead

Question 13

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

Accepted Answer

B. steel

Question 14

In transmission lines the cross-arms are made of________________?

Accepted Answer

D. steel

Question 15

Overhead lines generally use__________________?

Accepted Answer

C. A.C.S.R. conductors

Question 16

The power factor of industrial loads is generally______________?

Accepted Answer

B. lagging

Question 17

The loads on distributors systems are generally__________________?

Accepted Answer

B. unbalanced

Question 18

The material commonly used for insulation in high voltage cables is_______________?

Accepted Answer

B. paper

Question 19

Multicore cables generally use________________?

Accepted Answer

D. sector-shaped conductors

Question 20

High voltage transmission lines use__________________?

Accepted Answer

A. suspension insulators