Which action is a worker forbidden to take under the OHSA?
JHSC Part One: Duties of the workplace parties
Duties of employers, supervisors, workers, owners, suppliers and corporate directors, the competent person, and the health and safety policy and program.
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Study reference: Ontario JHSC Part One sources (Oct 2026), Ch. 3 Duties of the workplace parties — OHSA ss. 1, 25–32
All 14 questions in this test
Every question and its answer choices. The correct answers and explanations appear when you take the test above.
Which action is a worker forbidden to take under the OHSA?
- Asking the JHSC worker member a question about safety rules
- Reporting a hazard to the supervisor on the very same day it is found
- Wearing the protective equipment the employer has provided
- Removing a required protective device without a temporary replacement
Which general duty does the OHSA place on every employer?
- Pay for every worker's personal health insurance premiums
- Guarantee that no worker is ever injured in any circumstance
- Take every reasonable precaution to protect a worker
- Hire a full-time safety engineer at every workplace site
A company leases a scissor lift to an employer. What must the supplier ensure?
- It is painted in company colours and has the supplier's logo
- It is in good condition and complies with the Act and regulations
- It is used only by workers who have a car driver's licence
- Nothing; all duties pass to the employer once the lift is delivered
A supervisor knows that a floor area becomes slippery when a pump leaks. What must the supervisor do?
- Wait for the JHSC to notice it
- Advise workers of the danger
- Keep quiet to avoid alarm
- Tell only the maintenance crew
A worker sees that a machine guard is missing. What must the worker do?
- Report it to the employer or supervisor
- Ignore it if the machine still runs
- Fix it at home over the weekend instead
- Post about it on social media first
In what languages must the employer post the OHSA and ministry explanatory material?
- French only, in every Ontario workplace
- No posting is required if workers can read
- English and the majority language of the workplace
- Any language the employer prefers to use for notices
Under the OHSA, who is a supervisor?
- Any worker who has been employed for more than one year
- Only a person whose job title includes the word "supervisor" in it
- Only a member of the employer's senior management team
- A person who has charge of a workplace or authority over a worker
When an employer appoints a supervisor, who must it appoint?
- The longest-serving worker
- A member of the JHSC
- Any worker who volunteers
- A competent person
How often must an employer review its written occupational health and safety policy?
- Only when an inspector asks
- Only when the owner changes
- At least once a year
- Once every five years
What duty does the OHSA place on directors and officers of a corporation?
- Take all reasonable care that the corporation complies
- Sit on the JHSC as the employer's certified member at all times
- Personally inspect every workplace at least once every single week
- None; only the corporation itself has any duties under the Act
Which workplaces are exempt from the written health and safety policy requirement, unless otherwise prescribed?
- Those with five or fewer regularly employed workers
- Those with a JHSC that meets every single month
- Those with fewer than 50 regularly employed workers
- Those in the office and retail sectors of Ontario
Which is a supervisor's duty under the OHSA?
- Ensure workers use the protective equipment the employer requires
- Certify JHSC members after they complete their Part One training
- Write the employer's annual health and safety policy alone
- Approve all inspector orders before they take effect
Which description matches the OHSA definition of a competent person?
- Qualified to organize the work, knows the law, and knows the dangers
- Is a member of the JHSC and has attended at least one meeting
- Has worked at the company for at least five continuous years
- Has a university degree in any subject and two good references
What must an employer do to support the JHSC's work?
- Chair every single committee meeting itself
- Limit meetings to 15 minutes
- Assist and co-operate with the committee
- Approve each member's vote
Duties of the workplace parties: key rules to remember
Our summary of what the official handbook says on this topic, in our own words. Read it before or after the practice questions above, then check the original chapter. Read the official chapter ↗
employer duties
- Provide equipment, materials and protective devices and keep them in good condition; follow prescribed measures.
- Provide information, instruction and supervision to protect workers (25(2)(a)).
- Appoint a competent person as supervisor (25(2)(c)); the employer may be the supervisor if competent.
- Acquaint workers with hazards in the work and in handling, storing, using and disposing of agents (25(2)(d)).
- Assist and co-operate with the committee and the health and safety representative (25(2)(e)).
- Take every precaution reasonable in the circumstances for the protection of a worker (25(2)(h)).
- Post a copy of the Act and ministry explanatory material in English and the workplace's majority language (25(2)(i)).
- Prepare and review at least annually a written health and safety policy, keep a program to implement it, and post the policy (25(2)(j)–(k)); not required where five or fewer workers are regularly employed.
- Give the committee the results of occupational health and safety reports (25(2)(l)).
definitions
- A "competent person" is qualified by knowledge, training and experience to organize the work, knows the Act and regulations that apply, and knows the potential or actual dangers.
- A "supervisor" is a person who has charge of a workplace or authority over a worker.
supervisor duties
- Ensure workers work in the manner and with the protective devices and procedures the law requires, and use the equipment the employer requires.
- Advise workers of any potential or actual danger the supervisor knows about.
- Provide written instructions where prescribed, and take every precaution reasonable in the circumstances.
worker duties
- Work in compliance with the Act and regulations; use or wear required equipment and protective devices.
- Report missing or defective equipment and any hazard or contravention to the employer or supervisor.
- Do not remove or disable protective devices, do not work in a way that endangers anyone, and no pranks, contests or rough conduct.
owners, suppliers, directors and officers
- Owners must ensure prescribed facilities are provided and maintained (s. 29).
- A supplier who leases equipment must ensure it is in good condition and complies with the law (s. 31).
- Every director and officer of a corporation must take all reasonable care that the corporation complies with the Act, regulations and orders (s. 32).
Study the Duties of the workplace parties rules as flashcards →
Other topics
- Certification and the internal responsibility systemHow JHSC certification works (Part One, Part Two, refresher, Chief Prevention Officer), what certified members do, and the internal responsibility system behind Ontario's law.
- The OHSA and how the law worksHow the Occupational Health and Safety Act, regulations, standards and guidelines fit together, key sector regulations, enforcement under Part VIII and penalties.
- Worker rights: know, participate, refuseThe right to know, the right to participate and the right to refuse unsafe work, the two-stage work refusal process, and protection from reprisals.
- When a JHSC is required and how it runsWhich workplaces need a committee or a representative, membership, co-chairs, meetings, minutes, postings, paid time and worker trades committees.
- JHSC powers and recommendationsWhat the committee may do: identify hazards, obtain information, recommend improvements, the employer's 21-day written response, consensus and co-chair recommendations, and inspector visits.
- Certified members and dangerous circumstancesWhat dangerous circumstances are, investigating complaints, bilateral and unilateral work stoppages, cancelling a direction and complaints of reckless use.
- Workplace violence and harassmentLegal definitions, policies, programs, risk assessments, the committee's role, reporting incidents, domestic violence and the Human Rights Code.
- Hazard recognition and categoriesHazard, injury and illness, the six hazard categories, the five contributing factors, states of matter, routes of entry and acute versus chronic effects.
- Workplace inspectionsWho inspects, how often, preparing and doing an inspection, reporting hazards to the committee and other ways to find hazards.
- Hazard assessment and exposure limitsMethods for assessing how serious a hazard is, exposure monitoring, the committee's right to be at the start of testing, and TWA, STEL and ceiling limits.
- Hazard control and evaluating controlsControlling hazards at the source, along the path and at the worker, the hierarchy of controls with examples, qualities of good controls and evaluating them.
- Reporting and investigating incidentsNotices of death, critical injury, lost-time injury and occupational illness, the critical injury definition, preserving the scene, and committee investigations.