UNDERGROUND CABLES

What is the primary reason for using underground cables?

• a) Aesthetics
• b) Environmental protection
• c) Cost-effectiveness
• d) Ease of maintenance

What is the most common insulation material used in underground cables?

• a) Rubber
• b) PVC
• c) XLPE
• d) Paper

What is the maximum voltage rating for underground cables?

• a) 33 kV
• b) 66 kV
• c) 132 kV
• d) 400 kV

What is the typical range of operating temperatures for underground cables?

• a) -20°C to 50°C
• b) -10°C to 70°C
• c) 0°C to 80°C
• d) 10°C to 90°C

What is the advantage of using armored cables?

• a) Higher ampacity
• b) Lower cost
• c) Smaller size
• d) Greater mechanical protection