Worksheets21-04-20
Total questions: 7
Worksheet time: 5mins
Which of the following transmission line have more initial cost?
Overhead Transmission
Underground transmission
Both have almost the same initial cost
None of the above
High voltage transmission lines use
Suspension insulators
Pin insulators
Both of the above
The material commonly used for insulation in high voltage cables is
Rubber
Paper
Lead
All of the above
The advantages of high transmission voltage are
Area of cross-section is reduced
Reduced line losses
Increase efficiency
All of the above
Which of the following materials is used for overhead transmission lines?
Steel Cored Aluminum
Galvanized Steel
Cadmium copper
Any of the above
Line efficiency increases for ________ transmission voltages.
Higher
Lower
Both
None of the above
Why is grease added between steel and aluminium conductors?
To reduce the corrosion by electrolytic action.
To reduce friction between the strand.
To eliminate the air gaps.
To reduce the leakage of current.
