WHMIS Hazard Classes and Symbols 2

Question 1

Which WHMIS 2015 pictogram shows a flame above a circle?

Accepted Answer

Oxidizing substances

Answer

The flame over circle pictogram represents oxidizing substances, which can cause or intensify fire by releasing oxygen.

Question 2

Under WHMIS 2015, 'gases under pressure' includes which sub-categories?

Accepted Answer

Compressed, liquefied, refrigerated liquefied, and dissolved gases

Answer

WHMIS 2015 recognizes four types of gases under pressure: compressed, liquefied, refrigerated liquefied, and dissolved gases.

Question 3

The skull and crossbones pictogram in WHMIS 2015 indicates which hazard?

Accepted Answer

Acute toxicity (fatal or toxic)

Answer

The skull and crossbones symbol signals acute toxicity — substances that are fatal or toxic in small amounts via ingestion, skin contact, or inhalation.

Question 4

Which class covers substances that can spontaneously ignite when exposed to air?

Accepted Answer

Pyrophoric liquids and solids

Answer

Pyrophoric liquids and solids ignite spontaneously within 5 minutes of contact with air, unlike self-heating substances that require time.

Question 5

What does the exclamation mark pictogram in WHMIS 2015 represent?

Accepted Answer

Moderate hazards like skin/eye irritation or specific target organ toxicity (single exposure)

Answer

The exclamation mark indicates less severe but still important hazards such as skin/eye irritation, skin sensitization, or STOT-single exposure category 3.

(WHMIS) Workplace Hazardous Materials Information System Practice Test

(WHMIS) Workplace Hazardous Materials Information System Practice Test

WHMIS Hazard Classes and Symbols 2