3NT Chapter 4 Electricity Part II

3NT Chapter 4 Electricity Part II

Fill in the Blanks

Multiple Choice

The fuse rating is expressed in terms of

• Current

• Voltage

• VAR

• KVA

Multiple Choice

The primary function of a fuse is to

• Open the circuit

• Protect the appliance

• Protect the line

• Prevent excessive currents from flow through the circuit

Multiple Choice

What is a Earth wire ?

• The carries the current form from the mains to different appliances connected to the main fuse

• The wire carries the current away from the appliances to the mains and hence completes the circuit

• The earth wire is safety wire that connects the metal case of the appliances to the earth