WHMIS 2015 Workplace Safety — Question Explanations
Workplace Hazardous Materials Information System (GHS-aligned): pictograms, labels, SDS, hazard classes, and worker responsibilities.
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A product with the potential to cause or be suspected of causing cancer, gene mutations, or birth defects w…
The Health Hazard pictogram (also called the 'exploding person') is used for serious, long-term health effects like carcinogenicity, mutagenicity, and reproduct
A substance is classified as causing 'Carcinogenicity, Mutagenicity, or Reproductive Toxicity' (CMR). This …
CMR properties are serious long-term effects on a person's health, and are therefore classified as Health Hazards under WHMIS.
Which of the following was a requirement of WHMIS 1988 labels but is NO LONGER required under WHMIS 2015?
Hashed (broken line) borders were a requirement of WHMIS 1988 supplier labels. WHMIS 2015 does not require a specific border design as long as the content is cl
A product classified as a 'Pyrophoric Liquid' has which of the following characteristics?
Pyrophoric substances (gases, liquids, or solids) are those that can ignite spontaneously in air at temperatures of 54°C or below.
How often is it recommended that an employer review their WHMIS training program to ensure it remains effec…
WHMIS education and training should be reviewed annually or whenever work conditions or hazard information changes significantly.
Where on an SDS would you find the emergency telephone number of the manufacturer or importer?
Section 1 of the SDS (Identification) includes the product name, the supplier's name, address, phone number, and emergency telephone number.
Which element on a WHMIS 2015 supplier label is a single word used to alert the reader to a potential hazar…
The 'Signal Word' (e.g., 'Danger' or 'Warning') is used on labels to alert the reader to a potential hazard and its relative severity.
The 'Biohazardous Infectious Materials' hazard class belongs to which WHMIS hazard group?
Biohazardous Infectious Materials (Category 1) is a unique Canadian hazard class within the Health Hazard group, representing organisms/toxins that cause diseas
Signal words used in WHMIS:
Only Danger / Warning.
Workplace label minimum content:
When decanted/repacked.
WHMIS 2015 aligns with:
Globally Harmonized System.
What is the primary purpose of a WHMIS supplier label?
A supplier label provides the essential hazard information and precautionary measures needed for the safe handling and use of a controlled product upon its arri
Which pictogram is specific to WHMIS and not part of the global GHS system, representing organisms that can…
The Biohazardous Infectious Materials pictogram is unique to Canadian WHMIS regulations and identifies materials containing harmful microorganisms.
The 'Worker's Right to Know' primarily refers to the right to:
The 'Right to Know' is a fundamental principle of WHMIS, ensuring workers receive the information and training necessary to work safely with hazardous products.
Who has the primary responsibility for providing the initial supplier label and Safety Data Sheet (SDS) for…
The supplier, manufacturer, or importer of a hazardous product is responsible for classifying the product and providing compliant labels and SDSs to the purchas
Which WHMIS 2015 pictogram indicates a product is flammable or may catch fire?
The Flame pictogram is used for products that can ignite and burn easily, representing a fire hazard.
Under WHMIS 2015, how many sections are mandatory in a Safety Data Sheet (SDS)?
A WHMIS 2015 compliant Safety Data Sheet must contain 16 specific sections to provide comprehensive information about a hazardous product.
What does the 'Gas Cylinder' pictogram signify?
The Gas Cylinder pictogram indicates that the product is a gas contained under pressure, which can explode or rocket if heated or dropped.
If you pour a hazardous product from a supplier-labelled container into a new container, what must you apply?
When a hazardous product is transferred to a new container for use in the workplace, a workplace label is required to identify the product and its hazards.
What is the primary duty of an employer regarding WHMIS education and training?
Employers have a legal duty to develop, implement, and maintain a worker education and training program that covers all employees who work with or near hazardou
In Canada, supplier labels and Safety Data Sheets must be available in which language(s)?
Health Canada requires that supplier labels and SDSs for hazardous products sold or used in Canada must be available in both of the country's official languages
WHMIS hazard classes are broadly divided into which two major groups?
WHMIS classifies hazardous products based on whether they pose a physical hazard (e.g., fire, explosion) or a health hazard (e.g., toxicity, carcinogenicity).
What does GHS stand for in the context of WHMIS 2015?
GHS stands for the Globally Harmonized System of Classification and Labelling of Chemicals. WHMIS 2015 aligned Canadian standards with the GHS for international
The 'Corrosion' pictogram indicates that a product can cause:
The Corrosion pictogram warns that a product can cause serious damage to skin and eyes upon contact, and may also be corrosive to metals.
Which pictogram would be used for a product that could explode if not handled properly, such as organic per…
The Exploding Bomb pictogram is used for products that have a severe explosion hazard, including self-reactive substances and organic peroxides.
A product that can cause death or acute toxicity with short exposure, even in small amounts, would be ident…
The Skull and Crossbones pictogram signifies that a product can cause immediate and severe toxic effects, including death, even with minimal exposure.
Which of the following is an example of a WHMIS 'Physical Hazard' class?
Flammable Liquids are classified as a physical hazard because their danger comes from physical properties like flammability. The other options are all health ha
Which of the following is an example of a WHMIS 'Health Hazard' class?
Aspiration Hazard is a health hazard, as it refers to the product causing harm by entering the lungs. The other options are physical hazards.
Which section of a Safety Data Sheet provides recommendations for Personal Protective Equipment (PPE)?
Section 8 of the SDS outlines exposure limits and recommends engineering controls, administrative controls, and Personal Protective Equipment (PPE) to minimize
A WHMIS 2015 workplace label requires which three pieces of information?
A workplace label must contain the product name (identifier), information for the safe handling of the product, and a statement that the Safety Data Sheet is av
A worker has the 'Right to Refuse' unsafe work. Before refusing, the worker should first:
The standard procedure for a work refusal requires the worker to first report the hazardous situation to their supervisor to give the employer an opportunity to
The 'Flame over Circle' pictogram specifically identifies what type of hazard?
The Flame over Circle pictogram is used exclusively for oxidizing hazards. Oxidizers can cause or intensify a fire or cause an explosion.
A worker's responsibilities under WHMIS include:
While employers and suppliers have duties to classify and label, the worker's key responsibility is to actively participate in training and apply that knowledge
If a supplier label on a container is accidentally removed or becomes unreadable, what should you do?
An unlabelled or illegibly labelled container is a serious hazard. Work should stop, and the situation must be reported to a supervisor so the product can be sa
The 'Right to Participate' gives workers the ability to:
The 'Right to Participate' involves workers in their own safety through mechanisms like being part of a health and safety committee or selecting a representativ
What information is found in Section 2 of a Safety Data Sheet?
Section 2, Hazard Identification, is a critical part of the SDS that summarizes the product's hazards and an the required label elements as per WHMIS 2015.
What is the key role of a supervisor in relation to WHMIS?
Supervisors are the employer's front-line representatives and are responsible for ensuring workers have the specific instruction and oversight needed to do thei
The health hazard class 'Specific Target Organ Toxicity – Single Exposure' (STOT-SE) refers to:
STOT-SE refers to significant, non-lethal health effects on specific body organs that can occur after a single exposure to a substance.
Under what circumstance is a workplace label primarily required?
Workplace labels are used for secondary containers or when the original supplier label cannot be used or is no longer present, ensuring hazard information stays
What information does Section 4 of an SDS provide?
Section 4 provides critical first-aid guidance for responding to exposures via different routes (inhalation, skin/eye contact, ingestion), including the most im
The 'Exclamation Mark' pictogram is used for what level of hazards?
The Exclamation Mark is a versatile pictogram used for less severe hazards such as irritation (skin and eye), skin sensitization, acute toxicity (harmful), or h
According to WHMIS regulations, how often must a supplier review and, if necessary, update a Safety Data Sh…
While the old WHMIS 1988 had a 3-year review cycle, WHMIS 2015 requires suppliers to update the SDS as soon as they become aware of any 'significant new data' t
Which statement best contrasts a supplier label and a workplace label?
Supplier labels have comprehensive information, including supplier details, pictograms, signal words, and hazard/precautionary statements. Workplace labels are
Certain products, like tobacco, cosmetics, and pesticides, are handled under other legislation. What is the…
WHMIS includes exemptions for products that are already regulated by other specific Canadian laws (e.g., the Tobacco Act, Food and Drugs Act, Pest Control Produ
An employer's legal 'duty of due diligence' regarding WHMIS means they must:
Due diligence is a legal defense for an employer. It means they can prove they took all reasonable steps and precautions to prevent an incident, going beyond me
Self-reactive substances and organic peroxides are unstable and may react dangerously on their own. They fa…
Self-reactivity and the instability of organic peroxides are inherent physical properties of the chemicals that can lead to fire or explosion. Therefore, they a
What is the key difference between a 'hazard statement' and a 'precautionary statement' on a label or SDS?
A hazard statement is a standardized phrase that describes the nature of the hazard (e.g., 'Causes serious eye damage'). A precautionary statement is a standard
An employer receives an SDS from a supplier that is formatted differently from other SDSs in the workplace,…
WHMIS 2015 does not mandate a rigid, fixed format for the SDS. While the section headings, numbers, and order are specified, suppliers can vary the visual layou
Where would you find information regarding the LD50 (Lethal Dose) of a product on an SDS?
Section 11 contains toxicological information, such as the LD50 (Lethal Dose 50%) and LC50 (Lethal Concentration 50%), which are measures of acute toxicity.
What is the definition of a 'Simple Asphyxiant' hazard?
A 'Simple Asphyxiant' is a gas that can displace oxygen in the air, potentially causing suffocation to those breathing the air in that space. They do not have a
Under WHMIS health hazards, what is a 'Mutagen'?
A 'Mutagen' is a substance that can cause permanent changes (mutations) in the DNA of cells, which may lead to genetic defects or cancer.
Which of the following is NOT a worker's responsibility under WHMIS?
While suppliers and employers have major duties, workers are responsible for participating in training, following safe work procedures, and reporting missing la
Which SDS section should you check to find out which chemicals should NOT be stored near the product (Incom…
Section 7 of the SDS provides information on safe handling and storage, including incompatible materials (substances that should not be stored together to avoid
Which three pieces of information must appear on a WHMIS 2015 workplace label?
The three required elements for a WHMIS 2015 workplace label are: Product Identifier, Safe Handling Precautions (including PPE), and a reference to the SDS. Pic
Which pictogram is used for products that cause 'Hazardous to the Ozone Layer' (Category 1)?
The Exclamation Mark is used for products that are 'Hazardous to the Ozone Layer' (though this is an environmental class that is adopted in Canada's WHMIS for h
What is the primary purpose of Personal Protective Equipment (PPE) in the context of WHMIS?
PPE (Personal Protective Equipment) such as goggles, gloves, and aprons are 'last resort' controls used to protect the individual worker from exposure when engi
How are 'Consumer Products' handled under WHMIS 2015?
Consumer products (like bleach or paint bought at a hardware store) are exempt from WHMIS labeling and SDS requirements for suppliers, but if used in a workplac
In which section of the SDS will you find the name, address, and telephone number of the manufacturer or im…
The 'Initial Supplier Identifier' (name, address, and phone number of the manufacturer or importer) is required in Section 1 (Identification).
Which pictograms might appear on a product classified as 'Organic Peroxides'?
Organic peroxides (which are both a fuel and an oxidizer) can be identified by either the Flame pictogram or the Exploding Bomb pictogram, depending on their se
A product labeled with the 'Flame over Circle' pictogram indicates the material is:
The 'Flame over Circle' (the 'O' for Oxygen) indicates an Oxidizer—a substance that provides oxygen, allowing other materials to burn more easily or even explod
What are the three fundamental rights of workers under Canadian Health and Safety legislation, including WH…
Workers have three basic rights: The Right to Know (about hazards), The Right to Participate (in health/safety), and The Right to Refuse (unsafe work).
What does the 'Aspiration Hazard' classification mean?
Aspiration hazards refer to products that may be fatal if they enter the airways (trachea and lungs) directly, often after being swallowed and then vomited. Thi
Which of the following describes 'Substances which, in contact with water, emit flammable gases'?
Water-reactive substances are those that, in contact with water, emit flammable gases. They are assigned the Flame pictogram. Section 10 of the SDS (Stability a
The silhouette of a person with a white star-shaped symbol on the chest indicates which type of hazard?
The 'Health Hazard' pictogram (silhouette with a star shape on the chest) is used for chronic or long-term health effects, including carcinogenicity, respirator
Which of the following is a legal responsibility of a worker under WHMIS regulations?
Under WHMIS, workers are legally required to participate in training programs and apply that knowledge to work safely.
Which section of an SDS should a worker consult to find the 'Flash Point' and 'Flammability Limits' of a su…
Section 9 of the SDS contains physical and chemical properties such as appearance, odor, pH, melting point, and flash point. Section 10 covers stability and rea
In the WHMIS 2015 classification system, how does the numbering of hazard categories relate to the severity…
Category 1 represents the highest level of hazard within a class. As the numbers increase (Category 2, 3, etc.), the level of hazard generally decreases.
Which hazard category is represented by the 'Flame' (without a circle) pictogram?
The 'Flame' pictogram is used for flammable gases, aerosols, liquids, and solids, as well as self-heating substances and organic peroxides.
How are products labeled with consumer hazard symbols (e.g., from a retail store) treated in a WHMIS-regula…
Consumer products (identified by round symbols like the poison or flammable logos) are exempt from WHMIS labeling and SDS requirements because they are regulate
Under WHMIS 2015, what are the two signal words that may appear on a supplier label?
A signal word is a single word used to indicate the relative level of severity of hazard. 'Danger' is used for high severity; 'Warning' is used for less severe
What type of health hazard is primarily associated with the 'Exclamation Mark' pictogram?
The Exclamation Mark pictogram is used for less severe health hazards, such as skin or eye irritation, skin sensitization, and specific target organ toxicity (s
If a supplier label on a hazardous product becomes missing or illegible in the workplace, what action must …
If a supplier label becomes unreadable or is lost, the employer is responsible for replacing it with a workplace label to ensure workers are aware of the hazard
A worker needs to know what type of respirator to wear when handling a chemical. Which SDS section provides…
Section 8 of the SDS provides guidance on Engineering Controls (like ventilation) and Personal Protective Equipment (PPE).
Which pictogram is specific only to Canada's WHMIS 2015 and is not part of the standard GHS system used int…
The 'Biohazardous Infectious Materials' pictogram (part of the 'Infectious Materials' class) is unique to Canada and was retained from the original WHMIS 1988 s
Standardized phrases that describe the nature of the hazard, such as 'Causes serious eye damage,' are known…
Hazard statements are standardized phrases that describe the nature of the hazard (e.g., 'Extremely flammable gas'). Precautionary statements describe measures
If you need to know if a chemical should be stored away from heat or in a cool, dry place, which SDS sectio…
Section 7 (Handling and Storage) provides instructions on how to safely store chemicals, including temperature requirements and incompatible materials.
Which of the following visual descriptions matches the pictogram for 'Corrosive to Metals'?
The 'Corrosion' pictogram is used for substances that can cause skin burns, eye damage, or can chemically damage/destroy metals.
WHMIS training and the provision of SDSs directly fulfill which of the three fundamental occupational healt…
The 'Right to Know' identifies the worker's right to be informed about the hazards they may be exposed to in the workplace. WHMIS is the primary vehicle for thi
On a WHMIS 2015 SDS, for which sections are the headings mandatory, but the actual content is considered op…
While SDSs are standardized to 16 sections, sections 12–15 (Ecological, Disposal, Transport, and Regulatory information) are required by WHMIS 2015, but the con
What is the primary danger associated with an 'Oxidizer' (represented by the 'Flame over Circle' pictogram)?
Oxidizing materials (Flame over Circle) provide oxygen, which can cause other materials to burn more fiercely or cause fire without an external spark. They do n
What is the official name of the current Canadian hazard communication system that incorporates GHS standards?
GHS (Globally Harmonized System) was implemented in Canada as WHMIS 2015 to standardize how chemicals are classified and labeled worldwide.
Who is responsible for ensuring that an up-to-date SDS is available for every hazardous product used in a s…
The 'Employer' is responsible for ensuring all hazardous products are labeled, SDSs are available, and workers are trained. The 'Supplier' provides the initial
Which pictogram is assigned to the hazard class 'Specific Target Organ Toxicity – Repeated Exposure'?
The 'Health Hazard' pictogram is used for Specific Target Organ Toxicity (Repeated Exposure) (STOT-RE). Single exposure is usually the 'Exclamation Mark'.
How often should an employer generally review the WHMIS training and education program provided to workers?
Employers must provide training that includes how to read labels/SDSs and how to handle chemicals safely. This must be reviewed at least annually or when condit
Where on the SDS would you find the emergency telephone number of the supplier or a 24-hour emergency respo…
Section 1 includes the product identifier (name), supplier info, and emergency phone number.
The 'Gas Cylinder' pictogram is used to identify which of the following?
The 'Gas Cylinder' pictogram is for gases under pressure, including compressed gas, liquefied gas, dissolved gas, and refrigerated liquefied gas. Any of these c
If an SDS lists 'Generic Chemical Name' instead of a specific chemical name and includes a Registry Number …
Confidential Business Information (CBI) allows a supplier or employer to withhold the exact chemical identity or concentration of an ingredient on an SDS/label
Which hazard is specifically represented by the pictogram featuring a flame over a circle?
The 'Flame over Circle' (oxidizer) pictogram is used for products that can cause or intensify a fire by providing oxygen, whereas the standard 'Flame' pictogram
In which SDS section would you find a product's pH, boiling point, and odour threshold?
Section 9 of the SDS contains physical and chemical properties such as appearance, odour, pH, melting/freezing point, and solubility. Section 7 covers handling/
A workplace label must include the product identifier and safe handling precautions. What is the third mand…
While supplier labels require specific borders and many elements, workplace labels are more flexible but must include: Product Identifier, Safe Handling Precaut
Comparing hazard categories within the same class, which of the following indicates the most severe hazard?
In WHMIS 2015/GHS, Category 1 represents the highest (most severe) hazard level within a class. As the number increases (2, 3, 4), the severity of the hazard de
According to WHMIS regulations, how must an employer store Safety Data Sheets (SDSs)?
Employers must ensure SDSs are readily available to workers at the job site. While digital copies are allowed, workers must know how to access them and have acc
The 'Health Hazard' pictogram (silhouette with a white starburst) is used for all the following EXCEPT:
While the Health Hazard pictogram (silhouette with star) is used for many chronic hazards, 'Skin Corrosion' specifically uses the Corrosion pictogram (test tube
Which of the following products is generally exempt from WHMIS 2015 supplier labeling and SDS requirements …
Certain products like consumer goods, explosives, and pesticides are covered by other Canadian legislation and are exempt from WHMIS 2015 supplier labeling/SDS
A worker needs to know what type of respiratory protection is required while using a chemical. Which SDS se…
Section 8 contains information on Engineering Controls (e.g., ventilation) and Personal Protective Equipment (PPE) requirements like gloves or respirators.
Which of the following is a direct responsibility of the worker under WHMIS?
Under WHMIS, workers have the responsibility to participate in training, follow safe work procedures, and report any missing or illegible labels to their employ
Which of the following pictograms is 'non-mandatory' under WHMIS 2015 but may still appear on a supplier la…
Under WHMIS 2015 (GHS), the environment pictogram (dead fish and tree) is not mandatory, though it may appear on labels at the supplier's discretion to align wi
Which hazard class would likely use the 'Exclamation Mark' pictogram?
The 'Exclamation Mark' pictogram is used for less severe hazards, including Skin or Eye Irritation, Skin Sensitization, and Specific Target Organ Toxicity (Sing
What are the two 'Signal Words' used on WHMIS 2015 supplier labels?
There are two signal words used in WHMIS 2015: 'Danger' for more severe hazards and 'Warning' for less severe hazards. Only one signal word (the more severe one
Which of the following describes 'Workplace-specific training' as opposed to 'General WHMIS education'?
General education covers how WHMIS works (labels, SDS), while 'Workplace-specific training' covers the specific hazards, handling, and emergency procedures for
The 'Biohazard' pictogram (round circle with three interlaced C-shapes) is used for which WHMIS hazard clas…
The biohazard pictogram (three circles interlaced) is unique to Canada's WHMIS system and is not part of the standard GHS set. It is used for Biohazardous Infec
Which SDS section provides detailed information on the routes of entry (e.g., inhalation, skin contact) and…
Section 11 (Toxicological Information) provides data on health effects, such as routes of entry (inhalation, ingestion, skin contact) and symptoms of exposure.
On a supplier label, the phrase 'Keep container tightly closed' is an example of a:
Precautionary statements describe measures that should be taken to minimize or prevent adverse effects resulting from exposure. This includes 'Keep away from he
What is the term for the standardized phrase on a label that describes the nature of the hazard (e.g., 'Cau…
A Hazard Statement is a standardized phrase assigned to a hazard class and category that describes the nature of the hazard. Example: 'Extremely flammable aeros
When is a 'Workplace Label' required in a facility?
Workplace labels are required when a product is transferred from its original container to a new one, or when a supplier label becomes unreadable. They are NOT
Where would you find the emergency telephone number of the supplier on an SDS?
Section 1 lists the product identifier, the manufacturer/distributor name, address, phone number, and emergency contact information.
In WHMIS 2015, Simple Asphyxiants are classified under which major hazard group?
Asphyxiants (simple and chemical) are categorized under Health Hazards in WHMIS 2015. Specifically, Simple Asphyxiants are substances that displace oxygen in th
What type of information is found in Section 5 (Fire-Fighting Measures) of an SDS?
Section 5 provides specific information on fighting a fire caused by the product, including suitable extinguishing media (water, foam, CO2) and hazardous combus
The requirement for employers to provide WHMIS training to employees is primarily based on which worker right?
The 'Right to Know' is the core principle of WHMIS—ensuring workers are informed about the hazards they work with through labels, SDSs, and training.
A substance that may catch fire spontaneously when exposed to air (Pyrophoric) would be labelled with which…
Pyrophoric liquids/solids (catch fire spontaneously in air) and Self-heating substances use the Flame pictogram. Explosives use the Exploding Bomb. Oxidizers us
If a container arrived in your workplace with an old WHMIS 1988 label (circular hatched border) today, what…
While WHMIS 2015 is the current system, some jurisdictions have legacy requirements. However, generally, if a label is from the old system (WHMIS 1988 - hatched
Under Canadian WHMIS 2015 requirements, which of these SDS sections is included but its content is NOT tech…
While WHMIS 2015 requires 16 sections to be consistent with GHS, sections 12-15 (Ecological, Disposal, Transport, and Regulatory info) are not mandatory under C
Which regulatory body is primarily responsible for the federal administration of the Hazardous Products Act…
WHMIS is a tripartite system involving the Federal Government (legislation), Provincial/Territorial governments (enforcement), and Industry (employers/suppliers
Which of the following health hazards is specifically represented by the 'Health Hazard' (person with star)…
The Health Hazard pictogram (silhouette with a star on the chest) is used for chronic health hazards, including respiratory sensitization, germ cell mutagenicit
When a hazardous product is transferred from its original container into a second container for use in the …
While supplier labels have 6 mandatory elements, workplace labels are simplified and only require: Product Identifier, Precautionary Statement (Safe Handling),
Under the GHS-aligned WHMIS 2015, which hazard group does 'Oxidizing Solids' belong to?
Oxidizing solids/liquids/gases are chemicals that can cause or contribute to the combustion of other material, generally by yielding oxygen. They are Physical H
In which section of the SDS would you look to find the flash point and pH of a hazardous chemical?
Section 9 of the SDS contains Physical and Chemical Properties, such as appearance, odor, pH, melting point, and flash point.
Under WHMIS 2015, which of the following is a primary responsibility of the worker?
Workers have the responsibility to participate in training, follow safe work procedures, and report any hazards or missing labels/SDSs to their supervisor.
What does the 'Flame' pictogram signify in a workplace setting?
The Flame pictogram is used for flammable solids, liquids, and gases, as well as pyrophoric substances and self-heating substances.
If you need to know which chemicals should not be stored near a specific hazardous product, which SDS secti…
Section 7 (Handling and Storage) provides instructions on safe handling practices and conditions for safe storage, including any incompatibilities.
Which hazard class is specific to Canada (retained from WHMIS 1988) and has its own unique pictogram?
The Biohazardous Infectious Materials class is a unique Canadian hazard class within the Health Hazard group that was retained from WHMIS 1988 because it was no
If a supplier becomes aware of 'significant new data' that changes how a product is classified, they must u…
Supplier labels must be bordered by a 'hashed' or 'dashed' line in WHMIS 1988, but in WHMIS 2015, the border requirement is no longer specifically a 'hatched' b
Which section of the SDS provides details on what type of gloves or respirator should be worn when using th…
Section 8 covers Exposure Controls and Personal Protection, including Engineering Controls and recommended PPE.
The 'Exclamation Mark' pictogram is used for which of the following hazard categories?
The exclamation mark is used for less severe hazards like Skin Irritation (Category 2), Eye Irritation (Category 2), and Specific Target Organ Toxicity - Single
Under WHMIS 2015, how often must a Safety Data Sheet (SDS) be updated by the supplier?
One of the main changes in the transition to WHMIS 2015 was the change in frequency for SDS updates. Under WHMIS 1988, they were updated every 3 years. Under WH
The 'Flame over Circle' pictogram is used to identify which specific hazard?
The 'Flame over Circle' pictogram is for Oxidizers. Many people confuse this with the 'Flame' pictogram. Oxidizers provide oxygen which allows fires to burn mor
What are the two signal words used on a WHMIS 2015 supplier label to communicate the level of hazard severity?
Signal words indicate the severity of the hazard. 'Danger' is used for more severe hazards, while 'Warning' is used for less severe hazards.
In terms of accessibility, where must an employer keep Safety Data Sheets (SDSs)?
Employers must ensure that SDSs are readily available to workers who may be exposed. This can be in a binder or on a computer, provided the worker knows how to
What type of WHMIS instruction must an employer provide to a worker exposed to hazardous products?
Education (general) covers how WHMIS works. Training (site-specific) covers the specific hazards and procedures at a particular job site. Both are required.
What hazard is indicated by the Skull and Crossbones pictogram?
The skull and crossbones indicates 'Acute Toxicity' (immediate and severe harm/death) from short-term exposure through inhalation, ingestion, or skin contact.
WHMIS 2015 hazards are primarily grouped into which two main categories?
WHMIS 2015 hazards are divided into two main groups: Physical Hazards (properties of the substance) and Health Hazards (damage to human health). A third group,
The 'Corrosion' pictogram can be used to represent hazards in which of the following groups?
The Corrosion pictogram (liquids pouring on a surface and a hand) is used for 'Corrosive to Metals' (Physical Hazard) as well as 'Skin Corrosion' and 'Serious E
Which of the three basic rights of Canadian workers is the primary reason for the existence of WHMIS?
The Right to Know is the foundational principle of WHMIS, ensuring workers have information about the hazards they work with.
Which of the following is a primary responsibility of an employee (worker) under WHMIS 2015?
While suppliers provide SDSs and employers provide training, it is the employee's responsibility to participate in training and apply that knowledge to work saf
A worker needs to know the specific temperature requirements and humidity controls for storing a chemical. …
Section 7 of a WHMIS 2015 SDS covers 'Handling and Storage', which includes precautions for safe handling and conditions for safe storage, including incompatibi
Which specific hazard class is unique to Canada's WHMIS 2015 and uses a pictogram that is not part of the s…
Biohazardous Infectious Materials is a unique Canadian hazard class within WHMIS 2015 and retains its original 'circle with three stylized U-shaped lines' picto
In which of the following scenarios is a 'Workplace Label' mandatory?
A workplace label is required when a product is transferred from its original container into a secondary container, or if a supplier label becomes illegible. Co
WHMIS 2015 hazards are primarily grouped into which two major categories?
WHMIS 2015 divides hazards into two major groups: Physical Hazards (based on physical or chemical properties like flammability) and Health Hazards (based on the
What is the primary hazard indicated by a pictogram showing a flame over a circle (the letter 'O')?
The 'Flame over Circle' pictogram specifically identifies Oxidizing gases, liquids, or solids, which can cause or intensify fire by providing oxygen.
In which section of the SDS would an employer find information regarding 'Engineering Controls,' such as th…
Section 8 (Exposure Controls/Personal Protection) lists Engineering Controls, such as local exhaust ventilation, in addition to PPE requirements.
The 'Health Hazard' pictogram (silhouette of a person with a star on the chest) is used for which of the fo…
The 'Health Hazard' pictogram (silhouette with star) is used for chronic or severe health effects, including Carcinogenicity, Reproductive Toxicity, and Aspirat
Which of the following items is generally exempt from WHMIS 2015 supplier labeling and SDS requirements bec…
Certain products like Consumer Products, Cosmetics, and Drugs are exempt from WHMIS 2015 label and SDS requirements because they are covered by other Canadian l
Where would a worker find information on the safe way to dispose of a contaminated container?
Section 13 (Disposal Considerations) provides guidance on safe disposal practices, though local/provincial regulations also apply.
What specific type of hazard does the 'Skull and Crossbones' pictogram represent under WHMIS 2015?
The 'Skull and Crossbones' pictogram is reserved for products that can cause death or immediate toxicity even in small amounts (Acute Toxicity, Category 1, 2, o
Which section of a WHMIS 2015 Safety Data Sheet (SDS) provides instructions on what to do if a worker is ac…
The SDS is divided into 16 standardized sections. Section 4 always covers First-Aid Measures, providing immediate medical care instructions.
In which hazard group is the 'Corrosive to Metals' class situated?
The 'Corrosive to Metals' hazard class is categorized as a Physical Hazard because it describes the product's ability to chemically damage or destroy metals.
Which of the three fundamental OH&S rights is most directly supported by the presence of WHMIS labels and S…
The 'Right to Know' ensures workers are informed about the hazards they work with and how to protect themselves.
What are the language requirements for a WHMIS 2015 supplier label on a product sold in Canada?
WHMIS 2015 supplier labels must be provided in both English and French. They can be on one bilingual label or two separate labels.
If you need to find the pH level or the boiling point of a chemical, which SDS section should you consult?
Section 9 of the SDS details the physical and chemical properties of the substance, including its appearance, odor, pH, and flash point.
What is the definition of a 'Simple Asphyxiant' under WHMIS 2015?
Simple Asphyxiants are gases that can displace oxygen in the air, leading to suffocation. They do not have a specific GHS pictogram but are a recognized WHMIS h
The 'Gas Cylinder' pictogram appears on products that belong to which hazard class?
The 'Gas Cylinder' pictogram is used for gases under pressure, including compressed gases, liquefied gases, and dissolved gases.
How often must an employer review the WHMIS education and training program provided to employees?
Employers are required to review their WHMIS program at least annually, or more often if workplace conditions or hazard information changes.
On a WHMIS 2015 label, what does the 'Signal Word' indicate?
A Signal Word (either 'Danger' or 'Warning') indicates the severity of the hazard. 'Danger' is used for more severe hazards.
Which of the following health hazards would require the 'Health Hazard' pictogram (the silhouette of a pers…
The Health Hazard pictogram (silhouette with a star) is used for Serious Eye Damage/Irritation (if severe), Respiratory Sensitization, Germ Cell Mutagenicity, C
Which SDS section contains information about which materials are 'incompatible' with the product and should…
Section 10 (Stability and Reactivity) lists conditions to avoid (like heat or shock) and incompatible materials that could cause a dangerous reaction.
Under Canadian WHMIS 2015 regulations, which of the following SDS sections is considered 'optional' for the…
Sections 12-15 (Ecological, Disposal, Transport, and Regulatory info) are optional under WHMIS 2015 because they fall under other jurisdictions, though they are
Which three pieces of information are required on a WHMIS 2015 Workplace Label?
Workplace labels require three things: the product name (matching the SDS), safe handling precautions, and a reference to the SDS. A pictogram is not strictly m
What is the main characteristic of a 'Pyrophoric' hazard class?
Pyrophoric liquids or solids are substances that, even in small quantities, can ignite within five minutes of coming into contact with air.
Regarding Safety Data Sheets (SDS), what is a primary responsibility of the employer?
The employer is legally responsible for ensuring that all hazardous products in the workplace have an up-to-date SDS that is easily accessible to all workers.
Which type of hazard is represented by the 'Exploding Bomb' pictogram?
The 'Exploding Bomb' pictogram is used for self-reactive substances (Types A and B) and organic peroxides (Types A and B) because they are highly unstable.
What is the difference between 'WHMIS Education' and 'WHMIS Training'?
WHMIS 'Education' refers to general knowledge (how WHMIS works), while 'Training' refers to site-specific instructions (how to handle specific chemicals at your
What are 'Hazard Statements' on a WHMIS 2015 supplier label?
Hazard Statements are standardized phrases that describe the nature and degree of the hazard (e.g., 'Extremely flammable aerosol'). Precautionary statements des
What should a worker do if they encounter a hazardous product in a container with a missing or unreadable l…
If a worker finds a container with no label or an illegible label, they must stop using it and immediately inform their supervisor so a workplace label can be a
The 'Exclamation Mark' pictogram is commonly used for which of the following?
The 'Exclamation Mark' is used for less severe hazards, such as skin or eye irritation (Category 2) or skin sensitization. 'Skull and Crossbones' is for high ac
In which SDS section would you find information about the Threshold Limit Value (TLV) or the type of gloves…
Section 8 contains information on Exposure Limits (like TLVs or PELs), engineering controls (like ventilation), and Personal Protective Equipment (PPE) requirem
What defines the 'Health Hazard' group in WHMIS 2015?
Health hazards are based on the ability of the product to cause a health effect, such as toxicity, irritation, cancer, or reproductive problems. Physical hazard
When must an employer provide site-specific WHMIS training to a worker?
Employers must provide site-specific training so workers know exactly how to use, store, handle, and dispose of the specific hazardous products they encounter a
What type of hazard is represented by the 'Corrosion' pictogram?
The 'Corrosion' pictogram depicts liquid dripping onto a metal plate and a hand, indicating the product can chemically damage metals as well as cause skin burns
Where on a Safety Data Sheet (SDS) would you find information about immediate medical attention and special…
Section 4 of the SDS provides essential first-aid measures for various routes of exposure (inhalation, skin contact, eye contact, and ingestion).
Which of the following is NOT a mandatory element of a WHMIS 2015 supplier label?
WHMIS 2015 supplier labels require the Product Identifier, Hazard Pictograms, Signal Words, Hazard Statements, Precautionary Statements, and Supplier Identifier
A product classified under 'Pyrophoric Liquids' poses what specific type of hazard?
Pyrophoric liquids are chemicals which, even in small quantities, can ignite within five minutes after coming into contact with air.
How often must an employer generally review their WHMIS education and training program?
Employers are legally required to review the WHMIS program and worker training at least annually, or more often if workplace conditions change.
If you need to know the long-term health effects of a chemical, which SDS section should you consult?
Section 11 provides the toxicological properties, including the routes of entry and the effects of both short-term (acute) and long-term (chronic) exposure.
What is the meaning of the 'Skull and Crossbones' pictogram?
The Skull and Crossbones symbol is used for products that are acutely toxic and can cause death or immediate severe injury even in small amounts.
Which information is required on a WHMIS 2015 workplace label?
Workplace labels must include the Product Identifier (name), safe handling precautions, and a reference to the availability of an SDS. Pictograms are recommende
Which hazard class refers to gases that may displace oxygen and cause rapid suffocation?
Simple Asphyxiants are gases that can displace oxygen in the air, leading to suffocation. They do not have a specific GHS pictogram but are a recognized hazard
How many standard sections are required on a WHMIS 2015 Safety Data Sheet (SDS)?
Under GHS alignment in WHMIS 2015, all Safety Data Sheets must follow a standard 16-section format.
What is a worker’s primary responsibility regarding Safety Data Sheets (SDSs)?
While employers must ensure SDSs are available, workers have the responsibility to read the SDS and follow the prescribed safe work procedures and PPE requireme
According to safety principles, what is the most effective method to protect workers from a hazardous product?
In the hierarchy of controls, the most effective way to eliminate a hazard is to remove it or substitute it with a less hazardous substance. PPE is the 'last li
In WHMIS 2015, which signal word indicates a more severe hazard?
There are two signal words in WHMIS 2015: 'Danger' (for more severe hazards) and 'Warning' (for less severe hazards). 'Danger' is the most severe.
The 'Gas Cylinder' pictogram is used for which of the following?
The 'Gas Cylinder' pictogram is used for gases under pressure, including compressed gases, liquefied gases, dissolved gases, and refrigerated liquefied gases.
When a hazard class is subdivided into categories, which category represents the highest level of hazard?
Category 1 is always the most hazardous within a WHMIS hazard class. As the number increases (e.g., Category 2, 3), the severity of the hazard decreases.
In which SDS section would you find the specific type of gloves or respirator required to handle a product?
Section 8 of the SDS details the Personal Protective Equipment (PPE) required, such as gloves, respirators, and eye protection, as well as exposure limits.
What is a special allowance for a WHMIS 2015 supplier label on a very small container (less than 100 ml)?
Small containers (under 100 ml) are exempt from some label requirements but must still include the Product Identifier, Supplier Identifier, Signal Word, and a s
If a worker does not understand the hazard information on an SDS, what is their required action?
If a worker does not understand the information on a label or SDS, they have a responsibility to inform their supervisor to receive further clarification or tra
Which SDS section provides information on incompatible materials that should not be stored near the chemical?
Section 10 (Stability and Reactivity) lists conditions to avoid (like heat or shock) and incompatible materials that could cause a dangerous reaction if they co
'Skin Sensitization' is categorized under which major hazard group?
Under WHMIS 2015, Skin Sensitization (causing an allergic skin reaction) is classified as a Health Hazard. Physical Hazards relate to properties like flammabili
What is the difference between WHMIS 'education' and 'training'?
'Education' refers to the general principles of WHMIS (how the system works), while 'Training' refers to site-specific instructions on how to handle the actual
When is a workplace label required?
A workplace label is required when a product is transferred from its original container into a new one, or if the original supplier label is lost or damaged.
The 'Health Hazard' pictogram (person with a starburst on the chest) is primarily used for:
The Health Hazard pictogram (silhouette with a starburst) is used for chronic (long-term) or serious health effects, including respiratory sensitization, germ c
Suppliers must update an SDS when they become aware of 'significant new data.' What is the timeframe for th…
If a supplier becomes aware of 'significant new data' that changes how the product is classified or handled, they must update the SDS within 90 days and the lab
A material that may cause or contribute to the combustion of another material by yielding oxygen is classif…
A material that can cause or contribute to the combustion of another material, typically by yielding oxygen, is an Oxidizer. These are marked with the 'Flame ov
Which of the following hazards is represented by the 'Corrosion' pictogram?
The 'Corrosion' pictogram depicts liquid dripping onto a hand and a metal bar, signifying the product can cause skin burns, eye damage, or damage to metals.
In which section of a Safety Data Sheet (SDS) would you find instructions on what to do if a chemical is sp…
Section 4 of the SDS covers First-Aid Measures, providing essential information on initial care for someone exposed to a hazardous product.
According to WHMIS regulations, how often should an employer review the WHMIS education and training program?
WHMIS legislation requires that training programs be reviewed at least annually, or more often if workplace conditions or hazard information changes.
The 'Exclamation Mark' pictogram is used for which of the following health hazard categories?
The Exclamation Mark pictogram is used for less severe health hazards, including skin sensitization, skin/eye irritation, and specific target organ toxicity (si
What are the two 'Signal Words' used on WHMIS 2015 supplier labels to indicate the severity of a hazard?
Signal words identify the severity of the hazard. 'Danger' is used for more severe hazards, while 'Warning' is used for less severe hazards.
What characterizes a 'Pyrophoric' hazard under the Physical Hazard classes?
Pyrophoric solids or liquids are substances that can ignite spontaneously in air within five minutes of coming into contact with it. They fall under the Flame p
In which situation is a workplace label required?
When a hazardous product is decanted (poured) into a different container for use in the workplace, a workplace label must be applied.
Which section of the SDS should a worker consult to determine what type of gloves or respirator they need t…
Section 8 of the SDS (Exposure Controls/Personal Protection) contains information on engineering controls and personal protective equipment (PPE) like gloves, r
The 'Health Hazard' pictogram (silhouette of a person with a star/burst on the chest) is used for which typ…
The Health Hazard pictogram (silhouette with a star/burst on the chest) is used for chronic or systemic hazards like carcinogenicity, respiratory sensitization,
In Canada, supplier labels and Safety Data Sheets must be provided in which language(s)?
Under WHMIS laws, Canadian suppliers must provide labels and SDSs in both English and French to comply with federal requirements.
Pictogram with skull & crossbones means:
Hazard class meaning.
Supplier label must include:
Six required elements.
Number of standardized sections in an SDS:
GHS-format 16 sections.
SDS must be readily available to workers:
Employer duty.
Two key components of WHMIS:
Labels, SDS, education/training.
Confidential business information (CBI) under HMIRA:
Health Canada controls.
Pictogram with flame over circle (Yield-on-Fire) means:
Oxidizing materials.
SDS Section 8 covers:
Engineering controls + PPE.
Worker right to know includes:
Core WHMIS rights.
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