RSS Industrial Hygiene 3

Question 1

In the hierarchy of controls, which measure is most preferred for eliminating industrial hygiene hazards?

Accepted Answer

Elimination of the hazard

Answer

Elimination completely removes the hazard from the workplace and is the most preferred control, as it makes the hazard non-existent rather than just managed.

Question 2

Substitution as an industrial hygiene control measure involves:

Accepted Answer

Replacing a hazardous material or process with a less hazardous alternative

Answer

Substitution replaces a hazardous substance or process with a safer alternative, reducing or eliminating risk while allowing the work process to continue.

Question 3

The recommended face velocity for a laboratory chemical fume hood is typically:

Accepted Answer

80–100 feet per minute (fpm)

Answer

Laboratory fume hoods are generally designed and tested for a face velocity of 80–100 fpm, sufficient to contain vapors without creating turbulence that could allow contaminants to escape.

Question 4

Under OSHA 29 CFR 1910.95, a baseline audiogram must be established within how many months of an employee's first exposure at or above the noise action level?

Accepted Answer

6 months

Answer

OSHA requires a baseline audiogram within 6 months of an employee's first exposure at or above the 85 dBA TWA action level to document pre-exposure hearing status.

Question 5

In ventilation system design, 'make-up air' refers to:

Accepted Answer

Air supplied to replace air exhausted from the space

Answer

Make-up air (supply air) replaces the volume of air removed by exhaust systems, maintaining air balance and preventing negative pressure that can compromise ventilation effectiveness.

RSS - Registered Safety Specialist Certification Practice Test

RSS - Registered Safety Specialist Certification Practice Test

RSS Industrial Hygiene 3