Applied Electricity

Question 1

1In a three-pin plug, the green and yellow wire is the

Hard

A. fuse B. neutral C. earth D. live

Question 2

2In a three-pin plug wired to the IEC colour code, the earth wire is

Easy

A. blue B. red C. brown D. green and yellow

Question 3

3The purpose of earthing an appliance is to

Easy

A. reduce bills B. increase power C. protect users from electric shock D. cool the appliance

Question 4

4Before working on a circuit you should

Easy

A. remove the fuse while live B. wet your hands C. isolate the supply and test that it is dead D. work with the power on

Question 5

5A 13 A fuse is suitable for an appliance of about

Medium

A. 50 W B. 100 W only C. 3,000 W on 230 V D. 10,000 W

Question 6

6The brown wire in a flexible cord is the

Hard

A. neutral B. switch wire C. earth D. live

Question 7

7In a three-pin plug, the fuse is connected in the

Easy

A. all three wires B. neutral wire C. live wire D. earth wire

Question 8

8In domestic wiring, switches should be connected in the

Easy

A. any conductor B. live conductor C. earth conductor D. neutral conductor

Question 9

9A person receiving an electric shock should first be

Easy

A. left alone B. pulled by the bare hand C. disconnected from the supply by switching off D. splashed with water

Question 10

10The IEE regulations require the earth loop impedance to be low so that

Hard

A. cables cool B. lamps glow brighter C. fuses or breakers operate quickly under faults D. bills reduce