Safety Systems & Standards Flashcards
7 cards from real ABA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Safety Systems & Standards flashcards as text
According to ANSI S3.6, audiometers must be calibrated at minimum how often for a full electroacoustic calibration?
Answer: Annually
ANSI S3.6 requires full electroacoustic calibration of audiometers at least annually to ensure accuracy of output levels.
In an industrial hearing conservation program, a standard threshold shift (STS) is defined as an average shift of how many dB at 2000, 3000, and 4000 Hz compared to baseline?
Answer: 10 dB
OSHA defines an STS as an average threshold shift of 10 dB or more at 2000, 3000, and 4000 Hz relative to the baseline audiogram.
What is the primary purpose of a baseline audiogram in an occupational hearing conservation program?
Answer: To establish a reference for detecting future noise-induced threshold shifts
The baseline audiogram serves as a reference point against which annual audiograms are compared to detect noise-induced threshold shifts.
Which type of hearing protection device typically provides the highest attenuation for high-frequency noise in industrial settings?
Answer: Foam earplugs
Properly inserted foam earplugs typically achieve the highest NRR values and provide superior high-frequency attenuation compared to earmuffs.
Under OSHA 1910.95, employers must make audiometric testing available to employees exposed at or above the action level within how many months of first exposure?
Answer: 6 months
OSHA requires that a baseline audiogram be obtained within 6 months of an employee's first exposure at or above the 85 dBA action level.
A noise measurement using a dosimeter records a TWA of 92 dBA over an 8-hour shift. The applicable OSHA allowable exposure time at 92 dBA is closest to:
Answer: 6 hours
Using OSHA's 5 dB exchange rate table, 92 dBA corresponds to approximately 6 hours of allowable exposure, as 90 dBA allows 8 hours and 95 dBA allows 4 hours.
Which of the following is NOT a required element of OSHA's Hearing Conservation Amendment (29 CFR 1910.95)?
Answer: Engineering controls as the first priority
OSHA's HCA requires monitoring, audiometric testing, HPD provision, and training, but does not mandate engineering controls as a first priority within the HCA itself.