SHP Environmental Health & Industrial Hygiene

Question 1

What is OSHA's permissible exposure limit (PEL) for noise as an 8-hour time-weighted average (TWA)?

Accepted Answer

90 dB(A)

Answer

85 dB(A)

Answer

95 dB(A)

Answer

100 dB(A)

Question 2

Which organization publishes Threshold Limit Values (TLVs) for chemical substances and physical agents in the workplace?

Accepted Answer

ACGIH (American Conference of Governmental Industrial Hygienists)

Answer

OSHA (Occupational Safety and Health Administration)

Answer

NIOSH (National Institute for Occupational Safety and Health)

Answer

EPA (Environmental Protection Agency)

Question 3

In the hierarchy of hazard controls, which method is considered the most effective for protecting workers?

Accepted Answer

Elimination

Answer

Administrative controls

Answer

Personal protective equipment (PPE)

Answer

Engineering controls

Question 4

Indoor CO2 levels above what concentration are generally associated with inadequate ventilation and increased occupant complaints?

Accepted Answer

1,000 ppm

Answer

500 ppm

Answer

2,000 ppm

Answer

5,000 ppm

Question 5

Under OSHA's Hearing Conservation Amendment (29 CFR 1910.95), at what noise action level must employers implement a hearing conservation program?

Accepted Answer

85 dB(A) TWA

Answer

80 dB(A) TWA

Answer

90 dB(A) TWA

Answer

95 dB(A) TWA

Question 6

In industrial hygiene air sampling, what is the primary advantage of personal air sampling over area (fixed-point) air sampling?

Accepted Answer

It directly assesses the worker's actual breathing zone exposure

Answer

It measures contaminant concentrations across a wider work area

Answer

It is less expensive and easier to conduct

Answer

It provides continuous real-time data to a monitoring station

Question 7

What does IDLH represent in the context of occupational health and industrial hygiene?

Accepted Answer

Immediately Dangerous to Life or Health — concentration posing immediate threat within 30 minutes

Answer

Initial Dose Limit for Hazards — starting exposure limit for new workers

Answer

Industrial Dust Level Hazard — threshold for particulate matter exposure

Answer

Integrated Daily Limit of Hazardous substances — a 24-hour occupational exposure limit