CIH Occupational Health Hazards 5

Question 1

Which pathogen causes occupational Q fever, and what is its primary exposure route for workers?

Accepted Answer

Coxiella burnetii via inhalation of contaminated aerosols from livestock

Answer

Q fever is caused by Coxiella burnetii, a highly infectious bacterium acquired primarily through inhalation of aerosols from infected livestock (cattle, sheep, goats).

Question 2

The concept of 'action level' under OSHA standards typically triggers which employer obligations?

Accepted Answer

Medical surveillance, exposure monitoring, and training programs

Answer

At the OSHA action level (typically one-half the PEL), employers must initiate medical surveillance, periodic air monitoring, and worker training.

Question 3

Which type of ventilation system is specifically designed to capture contaminants at or near the point of generation before they enter the worker's breathing zone?

Accepted Answer

Local exhaust ventilation (LEV)

Answer

Local exhaust ventilation (LEV) captures contaminants at the source through hoods, ducts, and fans before they disperse into the workplace air.

Question 4

Ergonomic risk factors for work-related musculoskeletal disorders (WMSDs) include all of the following EXCEPT:

Accepted Answer

Low relative humidity in the work environment

Answer

Low humidity is a comfort/environmental issue but not a recognized primary ergonomic risk factor for WMSDs, unlike repetition, force, posture, and vibration.

Question 5

A chemical with a high vapor pressure and low odor threshold is considered particularly hazardous because:

Accepted Answer

Workers may be overexposed before detecting it by smell, and it readily vaporizes

Answer

High vapor pressure means the chemical readily vaporizes to high concentrations, and a low odor threshold (relative to its TLV) provides poor warning of dangerous concentrations.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH Occupational Health Hazards 5