Fuses Quiz

You are using an electric lawn mower in the garden. To prevent a possible shock if you accidentally cut the wire, you need to use a:
1. PCB
2. MCB
3. RCD
4. JCB
Which one statement about the Earth wire is correct?
1. It is used as a colourful addition to a plug.
2. It provides a path for the current to return to the substation if there were a fault in a metal cased appliance.
3. It only works with appliances with a plastic case.
4. It does not need to be wired in.
Which one of these is NOT a sign of an appliance having a dangerous fault?
1. A hot fishy smell from the plug.
2. A socket that shows scorch marks.
3. Fuse going all the time.
4. The electricity meter reading gradually increasing
Which one of these is the best fuse to put into the plug of an appliance that takes 690 watts from the 230 V mains?
1. 1 A
2. 3 A
3. 5 A
4. 13 A
Which one statement is correct about charge?
1. It is measured in amps and is worked out using charge = current x time.
2. It is measured in coulombs and is worked out using charge = current x time.
3. It is measured in amps and is worked out using charge = current / time.
4. It is measured in coulombs and is worked out using charge = current / time.
A multimeter connected to the mains reads 244 V rms. What is the peak voltage?
1. 122 V
2. 172 V
3. 244 V
4. 345 V