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also had the same isolation question but answere can be easier for full marks. 1 isolate at a suitable point 2 secure the isolation by suitable means 3 verify correct operation of the voltage tester 4 test for dead at the point being worked on 5 verify that the voltage tester still works 6...

tip ... loose connection is always a banker on most fault questions and 3 factors for any repairs in industry/busy places are cost of repair or replacement,availability of parts,downtime,and time of doing job ie weekend ,holidays, night time etc

I had exam last week and had same sort of questions ! others i can recall was- name the testers and there parameters of 1-ohms 2-megohms 3-KA 4-Ms it also asked you to draw an earth fault path on a tn-s system and draw a polarity test on a lighting circuit it also asked for the correct...