Sag and Tension MCQ

11. In a transmission line, sag depends upon

1. Span length
2. Tension in conductors
3. Weight of the conductor per unit length
4. All of the above

12. Which of the following statements is correct?

1. Ice on conductors increases skin effect
2. Wind pressure reduces corona effect
3. Wind pressure is taken to act at perpendicular to that for ice
4. Ice on conductors reduces sag

13. Wind loading in coastal regions is in the range of

1. 40-50 kg/m²
2. 150 kg/m²
3. 96 kg/m²

14. The maximum tension in a section of overhead line conductor between two supports of unequal height occurs at

1. the higher support
2. the lower point
3. the midpoint of the conductor
4. none of the above

15. Stringing chart is useful

1. For finding the sag in the conductor
2. In the design of the tower
3. In the design of insulator string
4. Finding the distance between towers

16. Hot template curves are plots of

1. Temperature and humidity
2. Conductor sag and span lengths
3. Conductor weight and sag
4. None of the above

17. Galloping in transmission line conductors arises due to

1. Asymmetrical layers of ice formation
2. Vortex phenomenon in light winds
3. Heavy weight of the line conductors
4. Adoption of horizontal conductor configuration

18. Which one of the following is reduced by using stock bridge dampers 0n power overhead transmission lines?

1. Sag
2. Conductor Vibration
3. Line losses
4. Mechanical tension