WHMIS - Workplace Hazardous Materials Information System Hazard Classes and Pictograms Questions and Answers

Question 1

A container in the workplace has a pictogram of a skull and crossbones. Which hazard class does this symbol primarily represent?

Accepted Answer

Acute toxicity (fatal or toxic)

Answer

Corrosive to metals

Answer

Carcinogenicity

Answer

Flammable solids

Question 2

You are training a new employee who points to the 'Flame over Circle' pictogram. Which of the following statements BEST describes the hazard this represents?

Accepted Answer

The material can cause or intensify a fire or cause an explosion.

Answer

The material is flammable and will ignite on its own.

Answer

The material is under pressure and may explode if heated.

Answer

The material will release flammable gases when in contact with water.

Question 3

A worker finds a canister with the 'Gas Cylinder' pictogram. What is the primary hazard associated with this symbol?

Accepted Answer

The container holds gas under pressure which could explode if heated.

Answer

The gas is always flammable.

Answer

The gas is corrosive to the respiratory tract.

Answer

The gas is a biohazardous infectious material.

Question 4

Which of the following hazard classes is represented by the 'Health Hazard' pictogram, which shows a person with a starburst on their chest?

Accepted Answer

Carcinogenicity

Answer

Acute toxicity (harmful)

Answer

Skin corrosion or irritation

Answer

Combustible dusts

Question 5

A new cleaning agent is delivered to the workplace. The safety data sheet (SDS) indicates it falls under the 'Skin Corrosion/Irritation - Category 1' hazard class. Which pictogram would you expect to see on the label?

Accepted Answer

Corrosion

Answer

Exclamation Mark

Answer

Skull and Crossbones

Answer

Health Hazard

Question 6

Which WHMIS hazard group are classes like 'Flammable Liquids', 'Gases Under Pressure', and 'Corrosive to Metals' categorized under?

Accepted Answer

Physical Hazards

Answer

Environmental Hazards

Answer

Reactivity Hazards

Answer

Health Hazards