Electrical Systems in Buildings

What is the primary function of an electrical supply system?

• To generate mechanical energy

• To provide electrical energy to various devices and systems

• To store electrical energy

• To convert electrical energy into chemical energy

Which of the following is a component of an electrical supply system?

• Engine

• Hydraulic pump

• Pneumatic cylinder

• Transformer

What are fossil fuels primarily composed of?

• Metals

• Carbon-based materials

• Water

• Gases

What is the primary purpose of electric power transmission?

• To generate electricity

• To transport electricity from power plants to substations

• To store electricity

• To convert electricity into mechanical energy

Which of the following best describes electrical power?

• The rate at which electrical energy is consumed or produced

• The amount of electrical charge in a circuit

• The resistance in an electrical circuit

• The voltage drop across a resistor

What is a single-phase supply?

• A system that uses three wires to deliver power

• A system that uses one alternating current (AC) voltage

• A system that uses direct current (DC) voltage

• A system that uses two alternating current (AC) voltages

Which of the following is true about single-phase supply?

• It is more complex to install than three-phase supply

• It is typically used in industrial settings

• It provides power through one alternating current (AC) voltage

• It is more suitable for high-power applications

In a single-phase supply, how many wires are typically used?

• One

• Two

• Three

• Four

What is the typical application of a single-phase supply?

• High-voltage transmission lines

• Industrial machinery

• Large commercial buildings

• Residential homes

What is the frequency of a single-phase supply in most countries?

• 25Hz

• 50Hz or 60Hz

• 100Hz

• 200Hz