The underground system cannot be operated above
A. 440 V
B. 11 kV
C. 33 kV
D. 66 kV
Answer:D
The underground system cannot be operated above
A. 440 V B. 11 kV C. 33 kV D. 66 kV
Explanation: The underground system cannot be operated above 66 kV because of insulation difficulties but overhead system can be designed for operation up to 400 kV or higher even.