RSS Industrial Hygiene 1

Question 1

What does TLV-TWA stand for in industrial hygiene?

Accepted Answer

Threshold Limit Value - Time-Weighted Average

Answer

TLV-TWA (Threshold Limit Value - Time-Weighted Average) is the ACGIH-defined concentration for a normal 8-hour workday and 40-hour workweek to which workers may be repeatedly exposed without adverse effects.

Question 2

Which sequence correctly describes the industrial hygiene paradigm?

Accepted Answer

Recognize, Evaluate, Control

Answer

The industrial hygiene paradigm follows Recognize, Evaluate, and Control — you must first identify a hazard, then assess its magnitude, before implementing controls.

Question 3

OSHA's Permissible Exposure Limit (PEL) for occupational noise is:

Accepted Answer

90 dBA as an 8-hour TWA

Answer

OSHA's PEL for occupational noise exposure under 29 CFR 1910.95 is 90 dBA as an 8-hour time-weighted average.

Question 4

Which type of ventilation captures contaminants at their source before they disperse into the work environment?

Accepted Answer

Local exhaust ventilation

Answer

Local exhaust ventilation (LEV) captures contaminants at or near their point of generation, preventing them from entering the workplace atmosphere.

Question 5

ACGIH Biological Exposure Indices (BEIs) are used to:

Accepted Answer

Evaluate biological monitoring results from worker specimens

Answer

BEIs are reference values for evaluating biological monitoring results, representing determinant levels expected in specimens from healthy workers exposed at the TLV.

RSS - Registered Safety Specialist Certification Practice Test

RSS - Registered Safety Specialist Certification Practice Test

RSS Industrial Hygiene 1