WHMIS Hazard Classes and Pictograms 3

Question 1

The skull and crossbones pictogram under WHMIS 2015 is applied to acute toxicity of which severity categories?

Accepted Answer

Categories 1, 2, and 3 only

Answer

The skull and crossbones pictogram covers acute toxicity Categories 1–3; Category 4 uses the less severe exclamation mark instead.

Question 2

Which WHMIS pictogram is used to signal long-term health hazards such as carcinogenicity, mutagenicity, and reproductive toxicity?

Accepted Answer

Health hazard (silhouette with starburst)

Answer

The health hazard pictogram (a human silhouette with a starburst on the chest) covers chronic hazards including cancer, genetic damage, and reproductive effects.

Question 3

The exclamation mark pictogram in WHMIS is typically associated with which level of health hazard?

Accepted Answer

Moderate hazards including skin/eye irritation and harmful effects

Answer

The exclamation mark signals moderate but real hazards such as skin sensitization, eye/skin irritation, and harmful (Category 4) acute toxicity.

Question 4

Which WHMIS pictogram is required on containers of biohazardous infectious materials?

Accepted Answer

Biohazard symbol (overlapping circles/trefoil shape)

Answer

The internationally recognized biohazard symbol is used exclusively for biohazardous infectious materials in WHMIS.

Question 5

A chemical capable of causing an allergic skin reaction (skin sensitization) upon repeated contact would display which WHMIS pictogram?

Accepted Answer

Exclamation mark

Answer

Skin sensitization (allergic contact dermatitis) is covered by the exclamation mark pictogram, not the health hazard pictogram.

(WHMIS) Workplace Hazardous Materials Information System Practice Test

(WHMIS) Workplace Hazardous Materials Information System Practice Test

WHMIS Hazard Classes and Pictograms 3