WorksheetsICIT: Electrical Power Systems Quiz
Total questions: 15
Worksheet time: 8mins
What is the principle of operation of a generator?
Conversion of light energy into electrical energy
Conversion of sound energy into electrical energy
Conversion of mechanical energy into electrical energy
Conversion of heat energy into electrical energy
What is the main function of the rotor in an alternator or AC generator?
To convert mechanical energy into electrical energy
To house the windings
To step-down the voltage
To produce the magnetic field
Which type of power station uses fuel such as oil, natural gas, or coal to heat water into steam to rotate turbines and generate electricity?
Wind Power Station
Thermal Power Station
Atomic Power Station
Hydro-Electric Power Station
What is the purpose of a condenser in a thermal power station?
To convert steam energy into electrical energy
To condense steam back into water
To remove solid particles from the burning fuel
To rotate the turbines
What is the advantage of an underground electrical power transmission system?
Cheaper maintenance cost
Easier repair in case of lightning strikes
Higher efficiency in energy conversion
Does not spoil the landscape with unsightly poles
What is the purpose of a distribution system in electrical power supply?
To store excess electricity
To step-up the voltage
To generate electricity
To convey power from a power station to consumers
What is the voltage range for a 3-phase, 4-wire supply system in Singapore?
400 V, 50 Hz
300 V, 50 Hz
200 V, 50 Hz
230 V, 50 Hz
What is the purpose of a rising main distribution system in a multi-storey building?
To connect various floors to the main switchboard
To reduce the currents on the supply side
To evenly distribute load currents
To provide a backup power supply
What is the permitted voltage variation for a 3-phase 400 V supply according to Electricity Regulations?
± 10%
± 6%
± 20%
± 15%
What is the function of a feeder in a distribution system?
To connect one substation to another substation
To distribute electricity to consumers
To remove solid particles from the electricity
To step-down the voltage
What is the purpose of a Centralised Power System Control Centre?
To generate electricity
To distribute power to consumers
To monitor the power system
To store excess electricity
What is the advantage of an overhead electrical power transmission system?
Cheaper maintenance cost
Easier repair in case of lightning strikes
Higher efficiency in energy conversion
Does not spoil the landscape with unsightly poles
What is the main function of the stator in an alternator or AC generator?
To step-down the voltage
To house the windings
To produce the magnetic field
To convert mechanical energy into electrical energy
What is the purpose of a turbo-generator in a power station?
To condense steam back into water
To remove solid particles from the burning fuel
To convert steam energy into electrical energy
To rotate the turbines
What is the main source of electricity for the vast majority of electrical installations in the world?
Power stations
Tidal barrages
Solar power
Wind power
