AE & JE EE Quiz Undergroud Cables

The electrostatic stress in a cable is

The dielectric loss in the insulation of a lossy underground cable, due to leakage current is (using standard notations)

In a three-core cable, any two cores are connected to sheath, then what will be the capacitance measured between remaining core and sheath. Here C_s is capacitance between core and sheath and C_C = inter core capacitance.

Lead sheath protects conductor from

If the loss angle of a cable is δ then the power factor is given by:

The material for armouring on cable is usually

Consider the following statements regarding cable:

1. The insulation resistance of the cable will increase if the length of cable is increased.

2. For the same overall diameter of cable, the grading of cable will increase the safe working voltage.

3. The normal operating temperature of PVC cable is 70°C.

4. The thermal resistance of soil increases as the moisture content of soil increases.

Which of the following statement is/are correct?

A single core cable has insulation resistance of 100 MΩ/km. The insulation resistance for 5 km length is