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WorksheetsTransmission and Distribution of Electricity
Total questions: 15
Worksheet time: 8mins
2-pin plugs are not connected to the earth wire.
TRUE
FALSE
Choose the step-up transformer
A
B
C
Which of the following wire returns electric current to the branch substation?
Neutral wire
Live wire
Earth wire
Which of the following cuts off the electricity in the house when excessive current flows through it?
ELCB circuit breaker
MCB circuit breaker
Main switch
Electric meter
What is the colour of earth wire?
Brown
Red
Yellow and green stripes
Blue
The main supply of electrical energy in a house has a voltage of
33 kV
415 V
240 V
11 kV
Which of the following fuse cannot be replaced when melted?
Replaceable fuse
Irreplaceable fuse
Cartridge fuse
Name the component labelled D
Power station
National Grid Network
Switch zone
Step-down transformer
What is the function of live wire?
To carry electrical current from electrical appliance to substation
To carry leaked current to the ground
To carry electrical current from station to electrical appliance
What is the name of the wire in blue colour that labelled by number 2?
Live wire
Neutral wire
Earth wire
Which electrical appliance does not need earth wire?
Which fuse is suitable for a heater that uses a maximum electric current of 6.25 A?
Fuse 3 A
Fuse 5 A
Fuse 10 A
Fuse 13 A
Where does the electric power voltage begin to be lowered in the electricity transmission and distribution system?
Substation
National power grid
Switch field
Main substation
Which of the following uses single - phase wiring?
Industrial area
Shopping mall
Hotel
Homestay
What is the function of the National Grid Network?
Transmit electrical energy all over the country through high voltage cable network
Collect and channel the electrical energy to the consumers
Store voltage for emergency use
Lower the value of voltage to suit the supplied area
