CSS - Certified Safety Supervisor Personal Protective Equipment and Industrial Hygiene Questions and Answers Flashcards
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Which ANSI standard governs the selection and use of industrial head protection in the US?
Answer: ANSI Z89.1
ANSI Z89.1 establishes performance requirements for industrial head protection, including hard hats and bump caps.
Which type of hearing protection typically provides the highest Noise Reduction Rating (NRR) in occupational settings?
Answer: Foam earplugs
Properly inserted foam earplugs generally achieve NRR values of 29–33 dB, the highest among common hearing protection types.
OSHA's respiratory protection standard 29 CFR 1910.134 requires a written program when respirators are used in what circumstance?
Answer: Required for job tasks
A written respiratory protection program is mandatory whenever respirator use is required to protect worker health.
An industrial hygienist measures a worker's 8-hour TWA noise exposure at 92 dBA. Under OSHA 29 CFR 1910.95, what is the permissible exposure limit (PEL) for an 8-hour day?
Answer: 90 dBA
OSHA's PEL for noise is 90 dBA as an 8-hour TWA; exposure at 92 dBA therefore exceeds the PEL.
Which glove material offers the best chemical resistance to ketones and esters?
Answer: Butyl rubber
Butyl rubber gloves provide superior resistance to ketones, esters, and many other polar organic solvents.
When selecting eye protection, ANSI Z87.1 requires impact-rated safety glasses to be marked with which designation?
Answer: Z87+
The 'Z87+' marking indicates the eyewear meets the high-impact performance requirements of ANSI Z87.1.