CLC Codes, Standards & Safety Compliance 3 — Questions and Answers
Question 1: Under ADA Standards for Accessible Design, wall-mounted objects such as sconces projecting more than 4 inches into a circulation path must have their lowest element at what maximum height above the floor to protect pedestrians who are visually impaired?
- 27 inches (Correct answer)
- 34 inches
- 48 inches
- 80 inches
Correct answer: 27 inches
ADA standards require that protruding objects with leading edges between 27 inches and 80 inches above the floor must not protrude more than 4 inches; objects with their lowest edge at or below 27 inches are detectable by cane.
Question 2: Title 24 Part 6, California's Building Energy Efficiency Standards, requires mandatory daylighting controls in certain indoor spaces. Which of the following triggers this requirement?
- Enclosed spaces with windows providing a daylight zone of 120 sq ft or more
- Any space within 20 feet of an exterior wall
- All spaces with a connected lighting load above 500 watts
- Skylights in spaces larger than 500 sq ft (Correct answer)
Correct answer: Skylights in spaces larger than 500 sq ft
California Title 24 mandates daylight-responsive controls in skylit daylight zones in large enclosed spaces (over 2,500 sq ft with skylights), among other specific triggers.
Question 3: The IES RP-1 standard provides recommended practice for lighting in which environment?
- Office environments (Correct answer)
- Healthcare facilities
- Roadway and outdoor areas
- Sports and recreational facilities
Correct answer: Office environments
IES RP-1 is the Recommended Practice for Office Lighting, covering illuminance levels, luminance ratios, and visual comfort for office tasks.
Question 4: Under OSHA regulations, emergency lighting must be provided and tested in which scenario involving an industrial facility?
- Wherever the sudden loss of artificial light would expose workers to serious injury hazards (Correct answer)
- Only in facilities with more than 50 employees
- Only in underground operations
- Whenever natural light is unavailable for more than 4 hours per shift
Correct answer: Wherever the sudden loss of artificial light would expose workers to serious injury hazards
OSHA 29 CFR 1910.303 and related standards require emergency lighting wherever loss of normal illumination would create injury hazards, regardless of facility size.
Question 5: ANSI/IES RP-8 specifically addresses lighting for which application?
- Roadway and street lighting (Correct answer)
- Sports lighting
- Parking facilities
- Emergency egress
Correct answer: Roadway and street lighting
ANSI/IES RP-8 is the Recommended Practice for Design and Maintenance of Roadway and Parking Facility Lighting.
Question 6: The International Dark-Sky Association (IDA) Model Lighting Ordinance (MLO) classifies lighting zones from LZ0 to LZ4. A site designated LZ1 represents:
- Low ambient lighting — rural areas needing strong dark sky protection (Correct answer)
- Urban areas with high ambient lighting
- Industrial parks with 24-hour operations
- Residential neighborhoods with street lighting only
Correct answer: Low ambient lighting — rural areas needing strong dark sky protection
LZ1 designates areas of low ambient lighting, such as rural lands or parks, where dark sky protection is a high priority and strict uplight and trespass limits apply.
Question 7: According to NEC Article 700, required emergency systems must be capable of operating for a minimum of how long without normal power?
- 1.5 hours (Correct answer)
- 1 hour
- 2 hours
- 30 minutes
Correct answer: 1.5 hours
NEC Article 700.12 requires that emergency systems supply illumination for a minimum of 1½ hours upon loss of normal power.
CLC Codes, Standards & Safety Compliance 3
Under ADA Standards for Accessible Design, wall-mounted objects such as sconces projecting more than 4 inches into a circulation path must have their lowest element at what maximum height above the floor to protect pedestrians who are visually impaired?