Transmission lines carry the bulk of electricity from one place to another. Transmission lines contain conductors, insulators, protection devices, and transformers.
MCQ on Transmission line components
Guying is used:
- When a pole is not strong enough
- When transmission lines are in high lighting environments
- When HVDC transmission is used
- With three-phase systems
Correct answer: 4. With three-phase systems
Most commonly used material for transmission lines
- Aluminum only
- ACSR
- Steel only
- Steel + Copper
Correct answer: 2. ACSR
The topmost conductor on transmission lines is:
- For telecom lines
- Earth
- For mechanical support only
Correct answer: 2. Earth
For 765 kV which type of insulator is recommended:
- Suspension type
- Pin type
- Suspension type
- All of these
Correct answer: 3. Suspension type
String efficiency can be improved using:
- Longer cross arms
- By using a guard ring
- By grading the insulators
- All of these
Correct answer: 4. All of these