CEA Noise & Radiation Pollution Control 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 Noise & Radiation Pollution Control flashcards as text
What is the A-weighting filter applied to noise measurements intended to simulate?
Answer: Human ear's frequency sensitivity
The A-weighting filter adjusts measured noise levels to approximate the frequency response of the human ear, yielding dBA values.
Which EPA program regulates noise emissions from transportation equipment and construction machinery?
Answer: Quiet Communities Program
The EPA's Quiet Communities Program coordinates efforts to reduce noise from transportation and construction under the Noise Control Act.
What type of control is most effective as a first-line approach for reducing occupational noise exposure?
Answer: Engineering controls
Engineering controls—such as equipment modification or enclosure—are the most effective first-line approach to reducing noise at its source.
What does the term 'equivalent continuous sound level' (Leq) represent in noise monitoring?
Answer: Time-averaged sound energy over a specified period
Leq represents the equivalent steady-state sound level that contains the same acoustic energy as the fluctuating noise over a given period.
Which U.S. agency regulates occupational radiation exposure limits for workers?
Answer: Nuclear Regulatory Commission (NRC)
The Nuclear Regulatory Commission (NRC) sets occupational radiation dose limits for workers at licensed nuclear facilities.
What is the primary purpose of a noise barrier wall installed along a highway?
Answer: To reduce sound transmission to nearby receptors
Highway noise barriers are designed to block or deflect sound energy to reduce noise levels at sensitive receptors such as residences.