Electrical Systems Quiz

What is the voltage conversion at a secondary sub-station?

• 415/230 volts

• 33,000 volts

• 11,000 volts

• 132,000 volts

Which component converts electricity to 11,000 volts?

• Grid Supply Point

• Primary Sub-station

• Secondary Sub-station

• Large Sub-station

Purpose of auxiliary radiators for oil-filled transformer tanks is to

• Increase surface area for better cooling

• Increase the cubical content

• Circulate water for cooling

• Take up the expansion and contraction of cooling

Which component is NOT mentioned as part of the cooling system for a transformer?

• Oil pumps

• Insulation medium

• Heat exchangers

• Turbines

Why do we use transformers in power system networks?

• To change voltage levels

• To increase resistance

• To store energy

• To generate power

The following are among the parts of power system except

• Generation

• Fuse

• Transmission

• Distribution

The following are found in Hydroelectric generating plant except

• Dam

• Turbine

• Generator

• Boiler

The geothermal power plant uses ……….. to generate electricity.

• Natural gas

• Uranium

• Earth’s crust heat

• Water

Which of the following components may be part of a transformer's cooling system?

• Radiators

• Generators

• Transformers

• Circuit Breakers

Which of the following is NOT a factor that can affect the cooling system of a transformer?

• Seized bearing in the fan and pump motors

• Blocked cooling coils in water-cooled transformers

• Properly set valves

• Malfunction of temperature sensing devices