OSHA HazCom / GHS practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q1What shape and border does a GHS hazard pictogram use?
✓ Correct answer: B. A red square set on a point (diamond) with a black symbol on white
GHS pictograms are a red diamond (a square set on its point) framing a black hazard symbol on a white background.
Topic: GHS Pictograms
Q2The 'Flame' pictogram is used primarily for which kind of hazard?
✓ Correct answer: A. Flammable materials
The Flame pictogram covers flammables, self-reactives, pyrophorics, self-heating substances, and those that emit flammable gas in contact with water.
Topic: GHS Pictograms
Q3Which hazard is shown by the 'Flame Over Circle' pictogram?
✓ Correct answer: B. Oxidizers
The Flame Over Circle pictogram identifies oxidizers — substances that can cause or intensify fire by supplying oxygen.
Topic: GHS Pictograms
Q4The 'Exploding Bomb' pictogram warns of which hazards?
✓ Correct answer: B. Explosives, self-reactives, and organic peroxides
The Exploding Bomb covers explosives and certain self-reactive substances and organic peroxides that can detonate or explode.
Topic: GHS Pictograms
Q5The 'Gas Cylinder' pictogram indicates what type of hazard?
✓ Correct answer: B. Gases under pressure
The Gas Cylinder pictogram is used for gases under pressure: compressed, liquefied, refrigerated liquefied, and dissolved gases.
Topic: GHS Pictograms
Q6The 'Corrosion' pictogram (test tubes on a hand and metal) is used for:
✓ Correct answer: B. Skin corrosion/burns, serious eye damage, and metal corrosion
The Corrosion pictogram covers skin corrosion/burns, serious eye damage, and substances corrosive to metals.
Topic: GHS Pictograms
Q7The 'Skull and Crossbones' pictogram is reserved for which hazard?
✓ Correct answer: B. Acute toxicity (severe) — can cause death or toxic effects in small amounts
The Skull and Crossbones signals acute toxicity in the severe categories (1–3), where small exposures can be fatal or seriously toxic.
Topic: GHS Pictograms
Q8A product showing only the 'Exclamation Mark' pictogram most likely poses which hazard?
✓ Correct answer: B. Less-severe effects: irritation, skin sensitization, or narcotic effects
The Exclamation Mark covers lower-severity hazards: skin/eye irritation, skin sensitization, acute toxicity (category 4), and narcotic/respiratory irritation. It is not used together with the Skull or Corrosion symbols for the same endpoint.
Topic: GHS Pictograms
Q9The 'Health Hazard' pictogram (silhouette with a star burst in the chest) covers which serious effects?
✓ Correct answer: B. Carcinogenicity, respiratory sensitization, reproductive toxicity, target-organ and aspiration hazards
The Health Hazard (silhouette) pictogram is used for the most serious long-term health effects: carcinogen, mutagen, reproductive toxicity, respiratory sensitizer, target-organ toxicity, and aspiration hazard.
Topic: GHS Pictograms
Q10The 'Environment' pictogram (dead fish and tree) signals what?
✓ Correct answer: A. Aquatic toxicity / environmental hazard
The Environment pictogram warns of aquatic toxicity. Note: under OSHA HazCom this pictogram is NOT mandatory, though it is part of the UN GHS.
Topic: GHS Pictograms
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Theory