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...