CEA Lighting & Environmental Factors Flashcards
6 cards from real CEA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CEA Lighting & Environmental Factors flashcards as text
What is the recommended relative humidity range for a typical US office environment to balance thermal comfort and indoor air quality?
Answer: 30–60%
ASHRAE 55 and OSHA guidance recommend 30–60% relative humidity to minimize dry-air irritation and mold growth risk.
Which measure is MOST effective at reducing impact noise transmitted between floors in a multi-story office building?
Answer: Installing floating floors with resilient underlayment
Floating floor systems decouple the floor surface from the structure, reducing structure-borne impact noise transmission.
A worker reports headaches and eye irritation that improve on weekends. The ergonomist should FIRST investigate which factor?
Answer: Monitor refresh rate and screen glare
Symptoms tied to workdays and resolved on days off suggest a visual or environmental workplace trigger such as screen glare or poor refresh rate.
Which standard addresses minimum ventilation rates for acceptable indoor air quality in commercial buildings?
Answer: ASHRAE 62.1
ASHRAE 62.1 specifies minimum ventilation rates and indoor air quality requirements for commercial and institutional buildings.
Whole-body vibration exposure is MOST commonly a concern for which group of US workers?
Answer: Heavy equipment and vehicle operators
Heavy equipment operators (forklift, truck, construction machine) experience sustained whole-body vibration transmitted through the seat.
The Predicted Mean Vote (PMV) index was developed by which researcher and is used in which standard?
Answer: Fanger; ISO 7730
P.O. Fanger developed the PMV thermal comfort model, which is codified in ISO 7730 for predicting thermal sensation.