Exam Question

(a) What precaution must be taken when testing the insulation of generator cables and wiring connected to an AVR unit (6)

(b) If the synchroscope is malfunctioning, which instrument is the most essential to parallel an alternator with the busbar? Justify your answer. (6)

(c) How the air gap of an alternator is measured and why the air gap of an alternator to be checked periodically? (4)