(a) Give a brief outline about general maintenance of transformers (4)

(b) Explain about transformer rewinding and testing of transformer oil (4)

(c) A why jacketed fuel pipes are emploved, 1100/220V, 50Hz, single-phase transformer has a leakage impedance of (0.1 + j0.40) ohm for the H.V winding and (0.006 + j0.015) ohm for the L.V winding. Find the equivalent winding resistance, reactance and impedance referred to the H.V and L.V sides (8)