CEA CEA Noise & Radiation Pollution Control 2 — Questions and Answers
Question 1: What is the A-weighting filter applied to noise measurements intended to simulate?
- Human ear's frequency sensitivity (Correct answer)
- Peak noise events
- Background noise levels
- Industrial equipment output
Correct 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.
Question 2: Which EPA program regulates noise emissions from transportation equipment and construction machinery?
- Quiet Communities Program (Correct answer)
- National Ambient Air Quality Standards
- Comprehensive Environmental Response
- Integrated Risk Information System
Correct answer: Quiet Communities Program
The EPA's Quiet Communities Program coordinates efforts to reduce noise from transportation and construction under the Noise Control Act.
Question 3: What type of control is most effective as a first-line approach for reducing occupational noise exposure?
- Engineering controls (Correct answer)
- Administrative controls
- Personal protective equipment
- Hearing conservation programs
Correct answer: Engineering controls
Engineering controls—such as equipment modification or enclosure—are the most effective first-line approach to reducing noise at its source.
Question 4: What does the term 'equivalent continuous sound level' (Leq) represent in noise monitoring?
- Time-averaged sound energy over a specified period (Correct answer)
- Maximum instantaneous noise level
- Frequency-weighted peak noise
- Lowest recorded noise level
Correct 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.
Question 5: Which U.S. agency regulates occupational radiation exposure limits for workers?
- Nuclear Regulatory Commission (NRC) (Correct answer)
- EPA
- OSHA
- DOE
Correct answer: Nuclear Regulatory Commission (NRC)
The Nuclear Regulatory Commission (NRC) sets occupational radiation dose limits for workers at licensed nuclear facilities.
Question 6: What is the primary purpose of a noise barrier wall installed along a highway?
- To reduce sound transmission to nearby receptors (Correct answer)
- To monitor ambient noise levels
- To absorb radiation emissions
- To collect noise data for permits
Correct 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.
CEA CEA Noise & Radiation Pollution Control 2
What is the A-weighting filter applied to noise measurements intended to simulate?