HAZWOPER Hazard ID 5

Question 1

During a HAZWOPER site survey, a worker detects a sweet, chloroform-like odor from an unlabeled drum. Which hazard class should be suspected first?

Accepted Answer

Chlorinated solvent (halogenated hydrocarbon)

Answer

Sweet or chloroform-like odors are characteristic of chlorinated solvents such as TCE, PCE, or methylene chloride, which are common contaminants at industrial waste sites.

Question 2

Which instrument is MOST appropriate for detecting oxygen-deficient or oxygen-enriched atmospheres in a confined space at a HAZWOPER site?

Accepted Answer

Multi-gas meter with electrochemical oxygen sensor

Answer

Multi-gas meters equipped with electrochemical sensors specifically measure percent oxygen by volume and are required for confined space entry monitoring.

Question 3

What is the LOWER explosive limit (LEL) and why is it important for hazard identification?

Accepted Answer

The lowest concentration of vapor in air that will support combustion if ignited

Answer

The LEL is the minimum flammable vapor concentration in air; below the LEL the mixture is too lean to ignite, making it a critical fire/explosion hazard benchmark.

Question 4

A site Safety Officer observes containers with corroded labels, bulging lids, and crystalline deposits around bungs. What HAZWOPER action is MOST appropriate?

Accepted Answer

Treat containers as unknown hazards, isolate the area, and conduct air monitoring before proceeding

Answer

Corroded labels, bulging containers, and crystalline deposits are signs of potential instability or pressure buildup, requiring isolation and characterization before any handling.

Question 5

Which GHS pictogram indicates an acute toxicity hazard (fatal or toxic if swallowed, inhaled, or absorbed through skin)?

Accepted Answer

Skull and crossbones

Answer

The skull and crossbones GHS pictogram indicates acute toxicity categories 1-3, representing the most severe immediate toxic hazards.

(HAZWOPER) Certified HAZWOPER 40-Hour Instructor Practice Test

(HAZWOPER) Certified HAZWOPER 40-Hour Instructor Practice Test

HAZWOPER Hazard ID 5