QUIZ TEST


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You have to select only one out of 4


1. Corona occurs between two transmission conductors when they

Have high potential difference
Are closely spaced
Carry dc power
Both (first) and (second)

2. Critical voltage limit of a transmission line is increased by

Reducing the radius of the conductors
Reducing the spacing between conductors
Increasing the spacing between conductors
Increasing the radius of the conductors

3. Which of the following affects the corona least

Size and charge per ion
Number of ions
Atmospheric temperature
Mean free length

4. Transmission line constants are

Capacitance
Inductance
Resistance
All of these

5. The effect of corona is

Increased inductance
Increased reactance
Increased power loss
All of these

6. The inductance of line is minimum when

G M D is high
G M R is high
Both G M D and G M R are high
G M D is low but G M R is high

7. Corona is affected by

Size of conductor
Shape and surface condition of the conductor
Operating voltage
All of these

8. The inductance of single phase two wire power transmission line per km gets doubled when the

Radius of the wore is double
Distance between the wires is increased as square of the original distance
Distance between the wires is doubled
Distance between the wires is doubled

9. Capacitance of a transmission line

Increases with increase in its length
Decreases with increase in its length
Remains same with increase in its length
None of these

10. The skin effect of a conductor reduces with the increase in

permeability of conductor material
x-section of conductor
Resistivity of the conductor material
Supply frequency


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