Top 150+ Solved Transmission and Distribution of Electrical Energy MCQ Questions Answer
Q. jCorona usually occurs when the electrostatic stress in air around the conductor exceeds
a. 6.6 kV (r.m.s. value)/cm
b. 11 kV (r.m.s. value)/cm
c. 22 kV (maximum value)/cm
d. 30 kV (maximum value)/cm
Q. The voltage drop, for constant voltage transmission is compensated by installing
a. inductors
b. capacitors
c. synchronous motors
d. all of above
Q. The use of strain type insulators is made where the conductors are
a. dead ended
b. at intermediate anchor towers
c. any of the above
d. none of the above
Q. The current drawn by the line due to corona losses is
a. non-sinusoidal
b. sinusoidal
c. triangular
d. square
Q. Pin type insulators are generally not used for voltages beyond
a. 1 kV
b. 11 kV
c. 22 kV
d. 33 kV
Q. For transmission of power over a distance of 200 km, the transmission voltage should be
a. 132 kV
b. 66 kV
c. 33 kV
d. 11 kV
Q. For aluminium, as compared to copper, all the following factors have higher values except
a. specific volume
b. electrical conductivity
c. co-efficient of linear expansion
d. resistance per unit length for same cross-section
Q. Which of the following equipment, for regulating the voltage in distribution feeder, will bemost economical ?
a. Static condenser
b. Synchronous condenser
c. Tap changing transformer
d. Booster tr
Q. In a tap changing transformer, the tappings are provided on
a. primary winding
b. secondary winding
c. high voltage winding
d. any of the above
Q. Constant voltage transmission entails the following disadvantage
a. large conductor area is required for same power transmission
b. short-circuit current of the system is increased
c. either of the above
d. none of the above
Q. On which of the following factors skin effect depends ?
a. Frequency of the current
b. Size of the conductor
c. Resistivity of the conductor material
d. All of the above
Q. The effect of corona can be detected by
a. presence of ozone detected by odour
b. hissing sound
c. faint luminous glow of bluish colour
d. all of the above
Q. For transmission of power over a distance of 500 km, the transmission voltage should be inthe range
a. 150 to 220 kV
b. 100 to 120 kV
c. 60 to 100 kV
d. 20 to 50 kV
Q. In the analysis of which of the following lines shunt capacitance is neglected ?
a. Short transmission lines
b. Medium transmission lines
c. Long transmission lines
d. Medium as well as long tr