_______ carries electric current to an electrical appliances.

Choose the step-up transformer

_______ returns electric current to the branch substation.

_______ connects an electrical appliances directly to the Earth.

___________ disconnects the current supply temporarily when it is not needed (such as during repairing damaged wiring).

___________ cuts off the current supply in the house when excessive current flows through it.

___________ separates the final circuit into the other parts of electrical equipment like air conditioner circuit and controls the quantity of current flows through it.

The main supply of electrical energy in a house has a voltage of

The flowchart shows the sequence of the components in the electricity transmission and distribution system.

Power station -----> _____________ -----> National Grid Network ----> Main substation ----> _____________ ----> _____________ ----> Branch substation ----> Step-down transformer

The voltage of alternating current, a.c., is ___________ before it is transmitted through the National Grid Network.

The _______ enables electricity to be transmitted to the branch substation when needed

If an electrical appliance uses current of 11 A, which is the suitable value of fuse to be used.

Choose the safety components found in wiring system at home.

Mei Ling got an electric shock while ironing her clothes. The following information shows the steps taken by his brother to help her.

P- Calls an ambulance

Q- Remove electrical source using an insulator

R- Switches off the main power supply

S- Perform mouth to mouth resuscitation if the victim is not breathing.

Which sequence is correct?

2-pin plugs are not connected to the earth wire.

Substation is a part of an electrical generation which:

Two method of supplies:

  1) to pass conductor cable or bars into isolation or fused switches at each floor.

  2) to pass conductor into and out of a subsidiary distribution board at each floor.

This method is refer to: