AQS Health & Safety Protocols 3

Question 1

An air quality specialist is reviewing stack emission data and finds benzene emissions exceed the NESHAP limit. Benzene is classified as which type of pollutant under the Clean Air Act?

Accepted Answer

Hazardous Air Pollutant (HAP)

Answer

Benzene is listed as a Hazardous Air Pollutant (HAP) under Section 112 of the Clean Air Act, not a criteria pollutant.

Question 2

A worker develops occupational asthma after repeated low-level exposures to isocyanates. Which mechanism best explains this sensitization-based condition?

Accepted Answer

IgE-mediated or non-IgE immune sensitization after repeated exposure

Answer

Isocyanate-induced occupational asthma typically results from immune sensitization (IgE or non-IgE mediated) following repeated low-level exposures.

Question 3

Which NIOSH classification of half-facepiece air-purifying respirator is appropriate for protection against oil-based aerosols and non-oil particulates?

Accepted Answer

P100

Answer

P-series (P100) respirators are rated for use against oil and non-oil aerosols and filter at least 99.97% of airborne particles.

Question 4

A facility's emergency action plan requires sheltering-in-place during an accidental toxic gas release. Which action best reduces indoor infiltration of the outdoor contaminant?

Accepted Answer

Seal doors, windows, and turn off HVAC to minimize infiltration

Answer

During shelter-in-place, turning off HVAC and sealing openings minimizes the ingress of contaminated outdoor air.

Question 5

Chronic occupational exposure to asbestos is most strongly associated with which trio of diseases?

Accepted Answer

Asbestosis, mesothelioma, and lung cancer

Answer

Long-term asbestos exposure is classically linked to asbestosis (fibrosis), malignant mesothelioma, and lung cancer.

(AQS) Air Quality Specialist Certification Practice Test

(AQS) Air Quality Specialist Certification Practice Test

AQS Health & Safety Protocols 3