Q9. (a)Sketch a circuit diagram of a self-excited a.c. generator.(5)
(b)Describe the operation of the circuit sketched in part (a).(5)
Q10. (a) Describe the principle of operation of a ships Impressed Current Cathodic Protection system. (6)
(b) State the routine maintenance that should be carried out on an Impressed Current Cathodic Protection system. (4)
Q11. With reference to electrical short-circuits: (a) state, with reasons, THREE factors that will influence the severity of a short circuit; (6)
(b) explain the role of reactance when selecting protective devices. (4)
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