Free BOC Electrical Systems and Lighting Questions and Answers

Question 1

What is the function of a circuit breaker in an electrical system?

Accepted Answer

Protect against overcurrent

Answer

Increase voltage

Answer

Measure electricity usage

Answer

Balance electrical loads

Question 2

Which type of lighting is most energy-efficient for commercial buildings?

Accepted Answer

LED

Answer

Incandescent

Answer

Fluorescent

Answer

Halogen

Question 3

What device measures the amount of electrical energy consumed?

Accepted Answer

Electric meter

Answer

Transformer

Answer

Circuit breaker

Answer

Switchgear

Question 4

What is the purpose of using motion sensors in lighting systems?

Accepted Answer

Reduce energy by turning off unused lights

Answer

Increase brightness during peak hours

Answer

Control HVAC systems

Answer

Prevent electrical surges

Question 5

Which term refers to the rate at which electrical energy is used?

Accepted Answer

Power

Answer

Voltage

Answer

Resistance

Answer

Current

Question 6

Why is it important to balance electrical loads in a facility?

Accepted Answer

To prevent overloads and increase efficiency

Answer

To double the amperage

Answer

To ensure uneven energy supply

Answer

To decrease voltage