Certified Safety Professional Exam Industrial Hygiene and Exposure Assessment 2

Question 1

Which ventilation system type removes contaminated air directly at the source before it enters the worker's breathing zone?

Accepted Answer

Local exhaust ventilation (LEV)

Answer

Local exhaust ventilation captures contaminants at the point of generation, preventing them from dispersing into the workplace.

Question 2

A worker is exposed to Substance A at 40 ppm (TLV 50 ppm) and Substance B at 20 ppm (TLV 25 ppm). What is the combined exposure index?

Accepted Answer

1.40

Answer

The mixture formula is (40/50) + (20/25) = 0.8 + 0.8 = 1.6 — wait, that is 1.6, but the correct formula gives 0.8+0.8=1.6; the answer matching that formula is 1.60.

Question 3

What is the primary purpose of a biological exposure index (BEI)?

Accepted Answer

To measure the biological response or metabolite from occupational exposure

Answer

BEIs assess the amount of a substance or its metabolites in biological media (blood, urine) to gauge actual internal dose from occupational exposure.

Question 4

Which respiratory protection level provides the highest level of protection under OSHA's respiratory program?

Accepted Answer

Self-contained breathing apparatus (SCBA)

Answer

SCBA supplies breathing air from a portable source, providing the highest protection factor in IDLH or unknown atmospheres.

Question 5

Under OSHA 29 CFR 1910.95, at what noise level (8-hour TWA) must employers implement a Hearing Conservation Program?

Accepted Answer

85 dBA

Answer

Employers must implement a hearing conservation program when worker noise exposure equals or exceeds 85 dBA as an 8-hour TWA (action level).

Certified Safety Professional Exam Practice Test

Certified Safety Professional Exam Practice Test

Certified Safety Professional Exam Industrial Hygiene and Exposure Assessment 2