OSHA HAZWOPER 40-Hour

What is the main purpose of a decontamination line set up in the contamination reduction zone?

1. ATo speed workers directly into the hot zone
2. BTo store spare drums of waste
3. CTo provide a lunchroom for the crew
4. DTo systematically remove contamination from workers and equipment as they exitCorrect

Why: A decon line is a staged sequence of stations where workers shed and clean contaminated PPE and equipment step by step as they move from the hot zone toward the clean support zone. Progressing from most to least contaminated stations keeps material from being carried into clean areas or off site. It protects both the worker and everyone downstream.

A chemical vapor can enter the body through the lungs, be absorbed through skin, be swallowed, or be injected through a puncture. What are these four pathways collectively called?

1. ADose-response curves
2. BPhysical hazards
3. CRoutes of exposureCorrect
4. DExposure limits

Why: The four routes of exposure are inhalation (lungs), absorption (skin/eyes), ingestion (swallowing), and injection (puncture). Recognizing how a contaminant can reach the body drives the choice of PPE and controls: a respirator protects against inhalation but does nothing about skin absorption, so identifying the route first is fundamental.