Ôn Tập Giữa Kỳ I Công Nghệ 9

What is the main function of the fuse in a household circuit?

• Protect users from electric shock

• Regulate current

• Cut off current when overloaded

• Provide electricity to devices

What color is the phase wire in a domestic electrical system?

• Black

• Red

• Green

• Yellow

Which type of wire is commonly used for wiring in homes?

• Plastic insulated double wire

• Bare conductor wire

• High voltage wire

• Bare copper wire

What is the first step in the process of installing an electrical network in a house?

• Install protective devices

• Design the circuit diagram

• Wire the electricity

• Install switches

Which device is not a switching device?

• Circuit breaker

• Fuse

• Electrical socket

• Switch

What is the voltage used in a single-phase electrical system for household networks?

• 110V

• 220V

• 380V

• 400V

Which device is used to control the current?

• Switch

• Electrical socket

• Electrical conductor

• Fuse

What does the schematic diagram of the electrical network in a house represent?

• Location of electrical devices

• Wiring connections between electrical devices

• Location of wiring in the walls

• Type of materials used in the electrical system

Which device is not part of the protection system in the electrical network?

• Circuit breaker

• Fuse

• Electrical socket

Which device is not part of the protection system in the electrical network?

• Circuit breaker

• Fuse

• Socket

• Switch