NCCER Electrical Level 2 Module 3
Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified
What is the main purpose of electric lighting?
✔✔ To provide illumination for visibility, safety, and aesthetics.
What is the function of a light fixture?
✔✔ To house and support the light source while directing illumination.
Why are LED lights considered energy-efficient?
✔✔ They use less power and produce more light with minimal heat.
What is a ballast used for in lighting systems?
✔✔ It regulates the current to fluorescent and HID lamps.
Why is the color temperature of a light important?
✔✔ It affects the appearance and mood of a space.
1
, What does the term "lumens" refer to in lighting?
✔✔ The measure of the total visible light output of a lamp.
Why should lighting circuits be properly grounded?
✔✔ To prevent electrical shocks and ensure safety.
What is a dimmer switch used for?
✔✔ To control the brightness of a light.
Why are reflectors used in lighting fixtures?
✔✔ To direct and focus the light where it is needed.
What is the function of a photocell in lighting systems?
✔✔ It automatically turns lights on or off based on ambient light levels.
Why is it important to match the lamp type to the fixture?
✔✔ To ensure proper operation and avoid damage to the fixture or lamp.
2
Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified
What is the main purpose of electric lighting?
✔✔ To provide illumination for visibility, safety, and aesthetics.
What is the function of a light fixture?
✔✔ To house and support the light source while directing illumination.
Why are LED lights considered energy-efficient?
✔✔ They use less power and produce more light with minimal heat.
What is a ballast used for in lighting systems?
✔✔ It regulates the current to fluorescent and HID lamps.
Why is the color temperature of a light important?
✔✔ It affects the appearance and mood of a space.
1
, What does the term "lumens" refer to in lighting?
✔✔ The measure of the total visible light output of a lamp.
Why should lighting circuits be properly grounded?
✔✔ To prevent electrical shocks and ensure safety.
What is a dimmer switch used for?
✔✔ To control the brightness of a light.
Why are reflectors used in lighting fixtures?
✔✔ To direct and focus the light where it is needed.
What is the function of a photocell in lighting systems?
✔✔ It automatically turns lights on or off based on ambient light levels.
Why is it important to match the lamp type to the fixture?
✔✔ To ensure proper operation and avoid damage to the fixture or lamp.
2
