CESCO Industrial Hygiene & Exposure Monitoring 2

Question 1

Under OSHA's Respiratory Protection standard (29 CFR 1910.134), a quantitative fit test uses which measurement to determine respirator fit?

Accepted Answer

Fit factor — ratio of particle concentration outside to inside the facepiece

Answer

Quantitative fit testing measures the fit factor — the ratio of ambient challenge agent concentration outside the mask to concentration inside — using an instrument such as a PortaCount.

Question 2

Which class of respirator provides the highest level of respiratory protection and is suitable for IDLH atmospheres?

Accepted Answer

Self-Contained Breathing Apparatus (SCBA)

Answer

SCBA supplies clean air from a portable tank, providing full-face protection independent of the ambient atmosphere, making it required in IDLH conditions.

Question 3

Heat stress is evaluated using which composite index that accounts for temperature, humidity, and radiant heat?

Accepted Answer

Wet Bulb Globe Temperature (WBGT)

Answer

WBGT combines natural wet bulb, globe (radiant heat), and dry bulb temperatures and is the internationally accepted standard for occupational heat stress assessment.

Question 4

Ergonomic hazards that can cause musculoskeletal disorders (MSDs) in the workplace include which of the following risk factors?

Accepted Answer

Repetitive motion, awkward postures, and forceful exertions

Answer

MSDs are primarily caused by ergonomic risk factors including repetition, awkward postures, forceful exertions, contact stress, vibration, and extreme temperatures.

Question 5

A chemical is classified as a 'skin sensitizer' under GHS. What does this mean for exposure assessment?

Accepted Answer

Dermal exposure can cause an allergic reaction upon re-exposure even at low concentrations

Answer

Skin sensitizers cause allergic contact dermatitis; once sensitized, a worker can react severely to even trace exposures, making skin contact prevention critical.

CESCO - Certified Environmental, Safety and Compliance Officer Practice Test

CESCO - Certified Environmental, Safety and Compliance Officer Practice Test

CESCO Industrial Hygiene & Exposure Monitoring 2