Plumbing level 2 - PP2 - Electrical principles and processes

Which of the following is a good conductor of electricity?

• Plastic

• Rubber

• Copper

• Glass

What is the typical use for a 2.5mm twin and earth cable?

• Smaller electric shower

• Ring main

• Larger electric showers

• Lighting

What color is used to indicate the neutral wire?

• Blue

• Brown

• Green and yellow

• Red

What is the maximum fuse size for a domestic 3 pin plug?

• 20 amp

• 15 amp

• 13 amp

• 10 amp

What is the unit of electrical energy?

• Joule

• Ohm

• Ampere

• Watt

What is the resistance of a domestic appliance if the fuse size is 3 amp?

• 76.7 ohms

• 120 ohms

• 31 ohms

• 230 ohms

What is the correct fuse size for an appliance that needs 3kW in a domestic property?

• 13 amp

• 10 amp

• 20 amp

• 15 amp

What is the main purpose of trunking?

• To measure current

• To support the flexes

• To increase voltage

• To reduce resistance

What is the voltage in a domestic property?

• 110V

• 230V

• 500V

• 400V

What is the typical use for a 6.0mm twin and earth cable?

• Lighting

• Sockets

• Shower

• Cooker