Question 1
Which photometric quantity describes the luminous flux incident per unit area on a surface, and what is its SI unit?
Correct Answer:
Illuminance, measured in lux
Question 2
A point source produces 25 footcandles on a surface 4 ft directly below it. Using the inverse-square law, what is the illuminance at a point 8 ft directly below the same source?
Correct Answer:
6.25 footcandles
Question 3
In the lumen (zonal-cavity) method, what does the Coefficient of Utilization (CU) represent?
Correct Answer:
The fraction of luminaire lumens that reaches the work plane, accounting for room geometry and surface reflectances
Question 4
Using the lumen method, the number of luminaires required equals (target illuminance x area) divided by which expression?
Correct Answer:
Lumens per luminaire x CU x LLF
Question 5
Correlated Color Temperature (CCT) of a white light source is expressed in kelvin. A source rated 2700 K compared with one rated 5000 K will appear:
Correct Answer:
Warmer and more yellow/red
Question 1
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About this Exam

Prepare with the NCQLP LC Practice Questions - NCQLP Lighting Certified (LC) Exam practice quiz. This question bank includes 100 questions covering lighting, luminaire, illuminance, design, and source. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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NCQLP LC Practice Questions - NCQLP Lighting Certified (LC) Exam

This practice set contains 100 questions from the matching question bank and focuses on lighting, luminaire, illuminance, design, and source. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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