TheoryFree OSHA HazCom / GHS Practice Test
Take a free OSHA HazCom / GHS practice test for 2026 with questions, answers, explanations, PDF download and timed mock exam links.
OSHA HazCom / GHS Questions
Open each answer, read the explanation, then continue into the full practice flow.
Q1What shape and border does a GHS hazard pictogram use?
Show answer
✓ Correct answer: 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.
Q2The 'Flame' pictogram is used primarily for which kind of hazard?
Show answer
✓ Correct answer: Flammable materials
The Flame pictogram covers flammables, self-reactives, pyrophorics, self-heating substances, and those that emit flammable gas in contact with water.
Q3Which hazard is shown by the 'Flame Over Circle' pictogram?
Show answer
✓ Correct answer: Oxidizers
The Flame Over Circle pictogram identifies oxidizers — substances that can cause or intensify fire by supplying oxygen.
Q4The 'Exploding Bomb' pictogram warns of which hazards?
Show answer
✓ Correct answer: Explosives, self-reactives, and organic peroxides
The Exploding Bomb covers explosives and certain self-reactive substances and organic peroxides that can detonate or explode.
Q5The 'Gas Cylinder' pictogram indicates what type of hazard?
Show answer
✓ Correct answer: Gases under pressure
The Gas Cylinder pictogram is used for gases under pressure: compressed, liquefied, refrigerated liquefied, and dissolved gases.
Q6The 'Corrosion' pictogram (test tubes on a hand and metal) is used for:
Show answer
✓ Correct answer: Skin corrosion/burns, serious eye damage, and metal corrosion
The Corrosion pictogram covers skin corrosion/burns, serious eye damage, and substances corrosive to metals.
Q7The 'Skull and Crossbones' pictogram is reserved for which hazard?
Show answer
✓ Correct answer: 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.
Q8A product showing only the 'Exclamation Mark' pictogram most likely poses which hazard?
Show answer
✓ Correct answer: 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.
Q9The 'Health Hazard' pictogram (silhouette with a star burst in the chest) covers which serious effects?
Show answer
✓ Correct answer: 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.
Q10The 'Environment' pictogram (dead fish and tree) signals what?
Show answer
✓ Correct answer: 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.
Full OSHA HazCom / GHS bank + unlimited mocks
Try 30 questions free. Unlock the complete OSHA HazCom / GHS question bank, every explanation, and unlimited timed mock exams. Practice on any device.
Unlock OSHA HazCom / GHS →