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

The skull and crossbones pictogram indicates that a product can cause death or toxicity with short exposure to small amounts. This falls under the 'Acute toxicity' hazard class.

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 'Flame over Circle' pictogram represents oxidizing hazards. Oxidizers can cause or intensify a fire or cause a fire or explosion by providing oxygen.

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 Cylinder' pictogram represents gases under pressure. The primary hazard is the high pressure itself, which can cause the cylinder to explode if heated, regardless of the chemical properties of the gas inside.

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

The 'Health Hazard' pictogram is used for various serious, long-term health effects, including carcinogenicity (may cause cancer), germ cell mutagenicity, reproductive toxicity, and specific target organ toxicity after single or repeated exposure.

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

The 'Corrosion' pictogram is used for substances that can cause severe skin burns and eye damage, which corresponds to Category 1 of the Skin Corrosion/Irritation class. The Exclamation Mark is used for less severe irritation (Category 2).

(WHMIS) Workplace Hazardous Materials Information System Practice Test

(WHMIS) Workplace Hazardous Materials Information System Practice Test

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