Electrical ppt 3

How many power circuits are typically found in a modern dwelling?

• 1

• 2

• 3

• 4

What might the power circuits in a modern dwelling be used for?

• Cooker, Central heating, Alarm

• Television, Computer, Phone charger

• Refrigerator, Microwave, Toaster

• Washing machine, Dryer, Dishwasher

What is the primary function of an RCD?

• To protect against overload

• To protect against short circuits

• To protect against earth faults

• To protect against voltage spikes

What is the likely place where installers might still come across older fuse boards?

• Industrial buildings

• New constructions

• Some dwellings

• Commercial complexes

What is a cartridge fuse to BS 1361 used for?

• It is used in a consumer unit like a rewireable fuse.

• It is used in automotive applications.

• It is used for high-voltage power lines.

• It is used in battery-operated devices.

What is the wattage capacity for a 2.5mm cable?

• 700w

• 1400w

• 4000w+

• 2400w

Which appliance is a 4.0mm cable typically used for?

• Central heating

• Commercial

• Lights

• Kettle/immersion

What is the primary use of armoured cable?

• For plumbing installations

• On the incoming mains or to supply an outhouse with power

• For decorative purposes

• In telecommunications

What is the purpose of galvanised steel trunking?

• To conduct electricity

• To contain and protect cables

• To provide lighting

• To reduce noise

Which of the following is a characteristic of galvanised steel cable trays?

• Made of plastic

• Used for decorative purposes

• Perforated for ventilation

• Used to increase voltage