Certified Safety Professional Exam Industrial Hygiene and Exposure Assessment

Question 1

What is the OSHA Permissible Exposure Limit (PEL) for silica dust (respirable crystalline silica)?

Accepted Answer

0.05 mg/m³ as an 8-hour TWA

Answer

0.1 mg/m³ as an 8-hour TWA

Answer

0.025 mg/m³ as an 8-hour TWA

Answer

0.5 mg/m³ as an 8-hour TWA

Question 2

Which sampling method is used to determine a worker's full-shift exposure to airborne contaminants?

Accepted Answer

Personal (full-shift) sampling

Answer

Grab sampling

Answer

Area sampling

Answer

Wipe sampling

Question 3

The ACGIH Threshold Limit Value – Short-Term Exposure Limit (TLV-STEL) represents a concentration that workers can be exposed to for how long?

Accepted Answer

15 minutes

Answer

5 minutes

Answer

10 minutes

Answer

30 minutes

Question 4

What does a hazard ratio (HR) greater than 1.0 indicate in exposure assessment?

Accepted Answer

Exposure exceeds the occupational exposure limit

Answer

Exposure is within acceptable limits

Answer

Additional controls are optional

Answer

The substance is non-hazardous

Question 5

Which type of industrial hygiene control is considered most effective in the hierarchy of controls?

Accepted Answer

Engineering controls – elimination or substitution

Answer

Administrative controls

Answer

Personal protective equipment

Answer

Work practice controls

Question 6

What instrument is commonly used to measure noise levels in the workplace for industrial hygiene assessments?

Accepted Answer

Sound level meter / dosimeter

Answer

Spirometer

Answer

Photometer

Answer

Impinger