CESCO Industrial Hygiene & Exposure Monitoring

Question 1

Which organization publishes Threshold Limit Values (TLVs) used as guidelines for airborne chemical exposure in the workplace?

Accepted Answer

American Conference of Governmental Industrial Hygienists (ACGIH)

Answer

ACGIH publishes TLVs annually as voluntary exposure guidelines; OSHA uses legally enforceable Permissible Exposure Limits (PELs), which are different values.

Question 2

The hierarchy of controls for occupational hazards lists which method as the MOST effective way to protect workers?

Accepted Answer

Elimination

Answer

Elimination — physically removing the hazard from the workplace — is the most effective control because it permanently removes the risk rather than managing it.

Question 3

An 8-hour time-weighted average (TWA) exposure measurement is used to compare against which OSHA exposure limit type?

Accepted Answer

Permissible Exposure Limit (PEL)

Answer

OSHA PELs are 8-hour TWA values; STELs apply to 15-minute exposures and ceiling limits must never be exceeded at any instant.

Question 4

Noise-induced hearing loss is a permanent condition. At what OSHA action level (8-hr TWA) must employers implement a Hearing Conservation Program?

Accepted Answer

85 dBA

Answer

OSHA's Hearing Conservation Amendment (29 CFR 1910.95) requires a hearing conservation program when employee noise exposure equals or exceeds 85 dBA as an 8-hr TWA.

Question 5

Which sampling method is used to determine personal airborne chemical exposure during a work shift?

Accepted Answer

Personal breathing zone (lapel) sampling

Answer

Personal breathing zone sampling, where a collection device is worn near the nose and mouth, best represents the air a worker actually inhales during a shift.

CESCO - Certified Environmental, Safety and Compliance Officer Practice Test

CESCO - Certified Environmental, Safety and Compliance Officer Practice Test

CESCO Industrial Hygiene & Exposure Monitoring