Final Exam - Chp 4

Question 1

what are 3 characteristics of noise

Answer 1

1. Frequency: pitch of noise
2. Duration: length of time a worker is exposed to the noise
3. Loudness: noise of 85db is hazardous

Question 2

why are some physical agents difficult to identify

Answer 2

they sometimes hide in plain sight. worker’s behaviours are so rountinized that hazard is almost invisible

Question 3

what are shortcomings of noise control

Answer 3

1. the use of dB(A) partially addresses the issue of frequency, regulations do not adequately address the health effects of short, intense, and high frequency sounds
2. Insufficient evidence to determine if an exposure at 85 db every day of a period of many years is safe
3. Rules don’t account for individual variation

Question 4

why might noise & vibration exposure appear together

Answer 4

measured in similar way, require a specialized meter to detect intensity, measure real time level - most effect control is elimination

Question 5

what are the effect of thermal stress

Answer 5

too high tempartures can lead to heat stroke, too low can lead to hypothermia . control is to limit the workers exposure to hazardous temperatures

Question 6

what is the core principle of ergonomics

Answer 6

fit the job to the worker, not the worker to the job.