ELECTRICAL WIRING SYSTEM IN HOMES

ELECTRICAL WIRING SYSTEM IN HOMES

Multiple Select

Choose correct staements

• single phase line distribute 240V energy

• single phase line carry high voltage energy

• single phase line distribute electricity to housing area

• single phase line is suitable for electricity usage of more than 10kW or 50 A

Multiple Select

Choose correct staements

• three phase line distribute 240V energy

• three phase line carry high voltage energy

• three phase line distribute electricity to housing area

• three phase line is suitable for electricity usage of more than 10kW or 50 A

Multiple Choice

The electric meter

• disconnects electrical power supply when electrical energy is not needed

• measure amount of electrical energy used

• breaks the circuit if the current exceeds a safe value

• disconnects the electrical energy flowing through a circuit under abnormal conditions

Multiple Choice

The main switch

• disconnects electrical power supply when electrical energy is not needed

• measure amount of electrical energy used

• breaks the circuit if the current exceeds a safe value

• disconnects the electrical energy flowing through a circuit under abnormal conditions

Multiple Choice

The main fuse

• disconnects electrical power supply when electrical energy is not needed

• measure amount of electrical energy used

• breaks the circuit if the current exceeds a safe value

• disconnects the electrical energy flowing through a circuit under abnormal conditions

Multiple Choice

The circuit breaker

• disconnects electrical power supply when electrical energy is not needed

• measure amount of electrical energy used

• breaks the circuit if the current exceeds a safe value

• disconnects the electrical energy flowing through a circuit under abnormal conditions

Multiple Choice

Which is not the colour of the wire present in a three pin plug?

• brown

• yellow with green stripe

• black

• blue

Multiple Select

Which is not correct about the wire present in a three pin plug?

• brown-live wire

• yellow with green stripe-neutral wire

• black-live wire

• blue-neutral wire

Multiple Choice

Which is incorrect about the fuse?

• the rating of fuse is according to the maximum current the fuse carries

• the cartridge fuse can be replaced if the fuse is ‘blown’

• a fuse consists of a thin piece of wire with low melting point

• Suitable fuse rating is slightly higher than the current that flows through the appliance

Multiple Choice

The earth wire

• disconnects electrical power supply when electrical energy is not needed

• measure amount of electrical energy used

• connects electrical appliances directly to the Earth

• carries electricity back to the substation