2019/2020 FREE WAEC EXPO RUNZ: ELECTRICAL INSTALLATION QUESTIONS AND ANSWERS NOW AVAILABLE

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(1ai)
An electrical conductor is a substance in which electrical charge carriers, usually electrons, move easily from atom to atom with the application of voltage

( 1aii)
An electrical insulator is a material whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field

(1bi)
(1)Fibre glass
(2)Mineral wool
(3)cellulose
(4)Polyurethane Foam
(5)Polystyrene

(1bii)
(1)silver.
(2)copper.
(3)gold .
(4)aluminum .
(5)iron .

(2a)
(1)Always use insulated tools while working.

(2)Never use equipment with frayed cords, damaged insulation or broken plugs.

(3)Always take care while soldering your circuit boards. Wear goggles and keep yourself away from the fumes. Keep the solder iron in its stand when not in use; it can get extremely hot and can easily cause burns.

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