SHP Environmental Health & Industrial Hygiene 3

Question 1

What is OSHA's permissible exposure limit (PEL) for lead in general industry under 29 CFR 1910.1025?

Accepted Answer

50 µg/m³ as an 8-hour TWA

Answer

10 µg/m³ as an 8-hour TWA

Answer

25 µg/m³ as an 8-hour TWA

Answer

100 µg/m³ as an 8-hour TWA

Question 2

What is the primary function of a noise dosimeter in an occupational health and safety program?

Accepted Answer

To measure a worker's cumulative personal noise exposure dose over a work shift

Answer

To measure the frequency spectrum and pitch of workplace noise

Answer

To calculate the noise reduction rating of hearing protection devices

Answer

To determine the sound transmission class of walls and partitions

Question 3

ACGIH uses the 'Skin' notation next to a TLV to communicate what important information to industrial hygienists?

Accepted Answer

The substance can be significantly absorbed through the skin, contributing to total body burden

Answer

The substance causes irritant or corrosive skin burns on contact

Answer

The substance requires dermal PPE as the primary control measure

Answer

The substance has a skin sensitization hazard classification

Question 4

Under OSHA's HazCom 2012 standard (aligned with GHS), how many standardized sections must a Safety Data Sheet (SDS) contain?

Accepted Answer

16 sections

Answer

8 sections

Answer

12 sections

Answer

20 sections

Question 5

The ALARA principle in radiation protection requires that occupational radiation exposures be kept:

Accepted Answer

As low as reasonably achievable, considering economic and social factors

Answer

At acceptable levels and regularly assessed for compliance

Answer

At the allowable limit for absorbed radiation as calculated annually

Answer

At zero through complete elimination of radiation sources from the workplace

Question 6

Per NIOSH Method 7400, which filter media is specified for collecting personal air samples for asbestos fiber counting using phase contrast microscopy (PCM)?

Accepted Answer

Mixed cellulose ester (MCE) filter, 0.8 µm pore size

Answer

Polyvinyl chloride (PVC) filter, 5.0 µm pore size

Answer

PTFE (Teflon) filter, 2.0 µm pore size

Answer

Polycarbonate membrane filter, 1.0 µm pore size

Question 7

Biological monitoring is considered superior to air monitoring for certain chemical exposures primarily because it:

Accepted Answer

Measures the actual dose that has entered the body via all routes of exposure including skin and ingestion

Answer

Is less invasive and easier to perform during normal work operations

Answer

Provides instantaneous real-time data on chemical concentrations in the work environment

Answer

Is required by OSHA regulations for a greater number of chemical hazards