Topic 1

Electricity​ is the presence and flow of _______ in one direction.

• electrons

• protons

• ions

• neutrons

Electricity that gather in one place (not moving) is known as

• magnetic electricity.

• alternating electricity.

• static electricity.

• current electricity.

Who conducted the famous kite (electricity) experiment?

• Benjamin Franklin

• Thomas Edison

• Thomas Browne

• William Tan

AC generators are also known as

• transformers

• power stations

• alternators

• sub stations

How many power stations are there in Singapore?

• 1

• 2

• 3

• 4

Singapore is using _______________ power stations.

• high pressure superheated steam

• low pressure superheated steam

• water-driven hydroelectric

• steam-turbine hydroelectric

Singapore residential is using

• 230V 3-phase

• 230V single phase

• 400V 3-phase

• 400V single phase

Singapore industrial consumers are using

• 230V 3-phase

• 230V single phase

• 400V 3-phase

• 400V single phase

Singapore supply frequency is

• 50 Hz

• 50 KHz

• 100 Hz

• 100 KHz

This is a/an

• consumer unit

• MCB

• meterboard

• RCCB