Electrical Supply Quiz

What are the two types of electrical current?

• DC and DC

• BC and AC

• AC and DC

• AC and AC

How is power generated in a power station?

• By using solar panels

• By using wind turbines

• By using electromagnetism

• By using batteries

How many degrees are there between phases in a three-phase supply?

• 360 degrees

• 180 degrees

• 120 degrees

• 90 degrees

Calculate the line current on a delta connected system when the phase current is 40A.

• 120A

• 69.28A

• 38.46A

• 40A

Calculate the line current on a star connected system when the phase current is 40A.

• 40A

• 80A

• 160A

• 120A

Calculate the phase voltage on a delta connected system when the line voltage is 400V.

• 400V

• 200V

• 230V

• 430V

What is the voltage supplied for domestic heating pump?

• 230V single phase

• 12V DC

• 400V three phase

• 24V, 50V or 110V DC

What is the typical voltage supply for LED lighting?

• 230V single phase

• 24V, 50V or 110V DC

• 400V three phase

• 12V DC

What is the typical voltage supply for air conditioning fan?

• 400V three phase

• 12V DC

• 230V single phase

• 24V, 50V or 110V DC

What is the typical voltage supply for hot water heater?

• 230V single phase

• 12V DC

• 24V, 50V or 110V DC

• 400V three phase