ABA Emissions Control & Environmental Compliance 3

Question 1

OSHA's permissible exposure limit (PEL) for occupational noise over an 8-hour workday is:

Accepted Answer

90 dBA

Answer

OSHA sets the 8-hour TWA PEL at 90 dBA using a 5 dB exchange rate; exposures at or above this level require engineering or administrative controls.

Question 2

Under OSHA's Hearing Conservation Amendment, employers must implement a hearing conservation program when worker noise exposure reaches or exceeds a TWA of:

Accepted Answer

85 dBA

Answer

The OSHA action level is 85 dBA TWA; at this level employers must provide audiometric testing, hearing protection devices, and training even though it is below the PEL.

Question 3

OSHA defines a standard threshold shift (STS) as an average shift of how many dB at 2000, 3000, and 4000 Hz compared to the baseline audiogram?

Accepted Answer

10 dB

Answer

An STS is a 10 dB or greater average change in hearing threshold at 2000, 3000, and 4000 Hz, which triggers re-evaluation and enhanced hearing protection.

Question 4

Under OSHA 29 CFR 1910.95, a baseline audiogram must be obtained within how many months of a new employee's enrollment in the hearing conservation program?

Accepted Answer

6 months

Answer

OSHA allows up to 6 months for the baseline audiogram, provided the employee wears hearing protection devices during that interim period.

Question 5

According to OSHA, audiometric testing in a hearing conservation program must be performed by or under the supervision of a:

Accepted Answer

Licensed or certified audiologist, otolaryngologist, or physician

Answer

OSHA requires occupational audiograms to be conducted by or under the direct supervision of an audiologist, otolaryngologist, or physician.

(ABA) American Board of Audiology Practice Test

(ABA) American Board of Audiology Practice Test

ABA Emissions Control & Environmental Compliance 3