1. List the factors need to be considered in performance of the underground cables (both manufacturing point of view and performance). 2. List the protective layers (construction layers) in a typical underground cable. 3. Pleased list classification of the cables for underground services (based on voltage levels). 4. Please explain about SAIFI and CAIDI and what do they mean in electric utility industry? 5. Calculate the resistivity of the insulation material (ρ) for a single core cable with 5km long , Insulation resistance of 0.4 MΩ ,Core diameter is 20 mm ,Diameter of the cable over the insulation is 50 mm. 6. For a 3phase underground cable (stranded) 33kV, 50 Hz, with 4km length with 2.5 cm diameter for each conductor, radial thickness of the insulation 0.5 cm a) Determine the capacitance of the cable/phase b) Charging current/phase c) Total charging kVAR Note: relative permittivity of the insulation is 3.