Free WHMIS Hazard Classes and Symbols Questions and Answers 1 — Questions and Answers

Question 1: What does the following border signify?

Face Materials Downward
Container Itself Can Be Dangerous (Correct answer)
Container Contents Are Dangerous
Handle With Care

Correct answer: Container Itself Can Be Dangerous

Explanation: The border signifies "Container Itself Can Be Dangerous" in the WHMIS context. This symbol is used to indicate that the container, particularly pressurized gas cylinders, poses a hazard due to the pressure within the container, regardless of the nature of the contents.

Question 2: What does the following WHMIS symbol warn you about?

Bomb
Exploding Shrapnel
Explosion Hazard (Correct answer)
Gases Under Extreme Pressure

Correct answer: Explosion Hazard

Explanation: The Explosion Hazard symbol is a critical part of the WHMIS system, helping to alert workers to the presence of potentially explosive materials and the need for stringent safety precautions.

Question 3: The following WHMIS symbol represents what type of material?

Oxidizing
Flammable (Correct answer)
Dangerously Reactive
Poisonous

Correct answer: Flammable

Explanation: The WHMIS Flammable symbol indicates that the substance or mixture can easily ignite and burn. This symbol alerts workers to the presence of materials that pose a fire hazard.

Question 4: Which of the following words don’t accompany a WHMIS symbol to indicate the severity of risk?

Caution
Danger
Extreme Danger
Warning (Correct answer)

Correct answer: Warning

Explanation: The WHMIS Warning symbol signifies that the substance or mixture poses moderate hazards to health. These hazards can include irritation, specific organ toxicity, and other harmful effects that are less severe than those indicated by more dangerous symbols.

Question 5: What is the purpose of WHMIS?

To identify hazardous materials within the workplace and handle them safely
To reduce accidents and health hazards in the workplace
To increase safety for everyone in the workplace
All of the above (Correct answer)

Correct answer: All of the above

Explanation: The purpose of WHMIS (Workplace Hazardous Materials Information System) is comprehensive and includes all of the listed options. It is designed to identify hazardous materials within the workplace and ensure they are handled safely, reduce accidents and health hazards, and increase safety for everyone in the workplace. WHMIS achieves these goals through proper labeling, the provision of safety data sheets, and effective worker training. This system helps to create a safer work environment by informing workers about the risks associated with materials they may encounter and how to properly manage those risks.

Question 6: What are the routes of entry for a chemical?

Corrosion, inhalation, ingestion, infection
Ingestion, explosion, absorption, injection
Inhalation, absorption, ingestion, injection (Correct answer)
Ingestion, retention, dilution, inhalation

Correct answer: Inhalation, absorption, ingestion, injection

Explanation: The routes of entry for a chemical into the body are inhalation, absorption, ingestion, and injection. Inhalation occurs when chemicals are breathed in through the nose or mouth. Absorption happens when chemicals penetrate through the skin or eyes. Ingestion is when chemicals are swallowed. Injection refers to chemicals entering directly into the bloodstream through a puncture in the skin. Understanding these routes helps in managing and preventing exposure to harmful chemicals.

Question 7: What type of information does the WHMIS pictogram with a flame over a circle represent?

Oxidizing hazards that may cause or intensify a fire. (Correct answer)
Flammable materials that easily ignite.
Explosive materials that may cause blasts or projectiles.
Toxic materials that pose immediate toxicity.

Correct answer: Oxidizing hazards that may cause or intensify a fire.

Explanation: The WHMIS pictogram with a flame over a circle warns of oxidizing hazards. Oxidizers can dramatically increase the rate of fire by supplying oxygen, making them extremely dangerous in combustible environments. Recognizing this symbol helps prevent potential disasters by enforcing strict storage and handling guidelines that keep oxidizers away from flammable materials. This ensures a safer working environment, reducing the risk of fire outbreaks and promoting safe practices around substances that could otherwise exacerbate fire conditions.

Question 8: Which WHMIS class includes flammable materials?

Class B (Correct answer)
Class D
Class E
Class G

Correct answer: Class B

Explanation: WHMIS Class B is designated for flammable materials, which include any substance that can ignite easily under normal conditions. This class is vital for workers to recognize as it encompasses flammable gases, liquids, and solids. Proper identification, handling, and storage of Class B substances are crucial in preventing fires and ensuring workplace safety. Workers trained to recognize and respect the properties of flammable materials contribute to a safer working environment, reducing the likelihood of fire-related incidents.

Question 9: What does WHMIS stand for?

Workplace Healthy Materials Information System
Workplace Hazardous Materials Information System (Correct answer)
Workplace Hazardous Maintenance Information System
Workplace Health Materials Information System

Correct answer: Workplace Hazardous Materials Information System

Explanation: WHMIS stands for Workplace Hazardous Materials Information System. This system is designed to provide information about hazardous materials in the workplace, including their potential health effects, safe handling procedures, and necessary precautions. It is important for employees to be aware of and understand WHMIS in order to work safely with hazardous materials and protect their health.

Question 10: What are the three types of hazards classified in WHMIS?

Biological, fire, and physical hazards
Electrical, chemical, and fire hazards
Biological, chemical, and physical hazards (Correct answer)
Chemical, electrical, and fire hazards

Correct answer: Biological, chemical, and physical hazards

Explanation: The correct answer is biological, chemical, and physical hazards. WHMIS (Workplace Hazardous Materials Information System) classifies hazards into three main categories: biological hazards, which include harmful microorganisms and biological toxins; chemical hazards, which include hazardous substances and mixtures; and physical hazards, which include flammable, explosive, and reactive materials. These classifications help ensure the safe handling, storage, and use of hazardous materials in the workplace.

Question 11: The following WHMIS symbol means:

Dangerous to the Environment (Correct answer)
Causes Deforestation
Kills Aquatic Life
Causes Global Warming

Correct answer: Dangerous to the Environment

Explanation: The WHMIS Dangerous to the Environment symbol indicates that the substance or mixture poses a risk to the environment. This symbol alerts workers to materials that can cause harm to ecosystems, wildlife, or the environment in general.

Free WHMIS Hazard Classes and Symbols Questions and Answers 1

What does the following border signify?