Electrical Engineering MCQs on Power Transmission Part 20
Contents
Presence of earth in case of overhead lines
Presence of earth in case of overhead lines:
- Increases the capacitance
- Increases the inductance
- Decreases the capacitance
- Decreases the inductance
Correct answer: 1. Increases the capacitance
In order to eliminate sheath losses, a successful method is
In order to eliminate sheath losses, a successful method is:
- To transpose cables only
- To transpose cable along with cross bonding
- Cross bonding cables only
- None of these
Correct answer: 2. To transpose cable along with cross bonding
HVDC transmission is preferred to HVAC since
HVDC transmission is preferred to HVAC since:
- Harmonics problem is avoided
- HVDC terminal equipment is inexpensive
- VAR compensation is not needed in case of HVDC
- System stability can be improved
Correct answer: 4. System stability can be improved
Galvanized steel is generally used as
Galvanized steel is generally used as
- Earth wire
- Stray wire
- Structural components
- All of the above
Correct answer: 4. All of these
The number of strands of ACSR conductor for 3 layer transmission line
The number of strands of ACSR conductor for 3 layer transmission line:
- 1
- 5
- 19
- 35
Correct answer: 3. 19
Explanation:
Total number of strands N = 3x² – 3x + 1
Where, x = Number of layers = 3
Total number of strands N = 3×3² – 3×3 + 1 = 19