Top 80+ Solved Transmission and Distribution MCQ Questions Answer
Q. Overhead lines generally use
a. copper conductors
b. all aluminium conductors
c. A.C.S.R. conductors
d. none of these
Q. The material generally used for armour of high voltage cables is
a. aluminium
b. steel
c. brass
d. copper
Q. The material commonly used for sheaths of underground cables is
a. lead
b. rubber
c. copper
d. iron
Q. 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
Q. 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
Q. Large industrial consumers are supplied electrical energy at
a. 400 V
b. 11 kV
c. 66 kV
d. 400 kV
Q. In a D.C. 3-wire distribution system, balancer fields are cross-connected in order to
a. boost the generated voltage
b. balance loads on both sides of the neutral
c. make both machine^ run as unloaded motors
d. equalize voltages on the positive and negative outers
Q. In a D.C. 3-wire distributor using balancers and having unequal loads on the two sides
a. both balancers run as generators
b. both balancers run as motors
c. balancer connected to lightly- loaded side runs as a motor
d. balancer connected to heavily- loaded side runs as a motor
Q. 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
Q. 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
Q. As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximumvoltage to earth uses only
a. 31.25 percent of copper
b. 33.3 percent of copper
c. 66.7 percent of copper
d. 125 percent of copper
Q. Which of the following is usually not the generating voltage ?
a. 6.6 kV
b. 8.8 kV
c. 11 kV
d. 13.2 kV