Canada Exam Prep
JHSC Part One overview

JHSC Part One: Reporting and investigating incidents

Notices of death, critical injury, lost-time injury and occupational illness, the critical injury definition, preserving the scene, and committee investigations.

  • 15 questions
  • Topic drill
0/15
Reporting and investigating incidents · Question 1Score 0/0

Which injury is a "critical injury" under Ontario's definition?

Study reference: Ontario JHSC Part One sources (Oct 2026), Ch. 13 Reporting and investigating incidents — OHSA ss. 9(31), 51–53; O. Reg. 834; JHSC guide; JHSC Certification Training Program Standard, 8.1.12

All 15 questions in this test

Every question and its answer choices. The correct answers and explanations appear when you take the test above.

  1. Which injury is a "critical injury" under Ontario's definition?

    1. A sprained ankle
    2. A fractured arm
    3. A fractured finger
    4. A small cut needing stitches

  2. At a construction project, an equipment failure occurs with no injury. Within how long must the constructor give written notice to the JHSC?

    1. Within two days
    2. Within 21 days
    3. Within four days
    4. Immediately by phone

  3. What does Part One training advise JHSC members who are affected by investigating a serious incident?

    1. Avoid all future investigations at work
    2. Keep working and say nothing to anyone at all
    3. Resign from the committee immediately
    4. Seek assistance if they experience stress or trauma

  4. An employer learns a worker has filed a WSIB claim for an occupational illness. What notice is required?

    1. Written notice within four days to a Director, JHSC and union
    2. No notice, since illnesses are handled only by the WSIB itself
    3. A phone call to the worker's family within one week
    4. Notice only if the worker dies of the illness later

  5. While investigating a critical injury, what must the designated JHSC member avoid?

    1. Taking any notes or photographs of the scene at all
    2. Looking at the equipment involved in the incident
    3. Talking to any witness who saw what happened that day
    4. Disturbing the scene before an inspector permits it

  6. A worker misses work after a fall but is not critically injured. Within how long must the employer give written notice to the JHSC?

    1. Within one year
    2. Within 48 hours
    3. Within four days
    4. Immediately by phone

  7. A worker loses the tip of a finger in a press. Is this a critical injury under the definition?

    1. No, because presses are not covered by the Act
    2. No; amputation of a finger or toe is excluded
    3. Yes, if the worker misses more than one shift
    4. Yes; any amputation of any body part is critical

  8. Which of these is also a critical injury?

    1. A torn fingernail
    2. A mild headache
    3. Loss of sight in an eye
    4. A bruise on the shin

  9. Which skills does Part One training use to illustrate an effective investigation?

    1. Note taking, interviews, analysis, reports and recommendations
    2. Hiring, payroll, budgeting, marketing and customer service
    3. Driving, welding, lifting, painting and cleaning
    4. Accounting, legal drafting, sales and public speaking

  10. After a critical injury, within how long must the employer send a written report to a Director and the JHSC?

    1. 21 days
    2. 24 hours
    3. 48 hours
    4. 4 days

  11. A worker is critically injured at work. When must the employer notify an inspector and the JHSC?

    1. Within 30 days, in the annual report
    2. Only if the worker files a WSIB claim
    3. Immediately, by telephone or other direct means
    4. Within four days, in writing only, by mail

  12. After a fatal accident, when may someone move the wreckage before an inspector gives permission?

    1. To save life, relieve suffering, keep essential services or prevent damage
    2. Whenever the JHSC co-chairs agree that photos have already been taken
    3. Whenever the supervisor wants to restart production on the line quickly
    4. Whenever the employer's insurer asks for the equipment to be inspected

  13. What is the main goal of a workplace incident investigation?

    1. Find the causes so the incident does not happen again
    2. Decide how much the injured worker is paid
    3. Find one worker to discipline for the incident
    4. Prove the employer was not responsible at all

  14. Who designates the JHSC member to investigate a death or critical injury?

    1. The worker members of the committee
    2. The ministry inspector on site
    3. The injured worker's family
    4. The employer's senior manager

  15. To whom does the designated JHSC member report the findings of a critical injury investigation?

    1. The employer's insurer
    2. The local newspaper's editor
    3. The worker's union only
    4. The committee and a Director

Reporting and investigating incidents: 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 ↗

death or critical injury

  • If a person is killed or critically injured from any cause at a workplace, the employer (and constructor) must immediately notify an inspector, the committee or representative, and the union, by telephone or other direct means.
  • The employer must send a written report within 48 hours to a Director and to the committee, representative and union.
  • No one may disturb the scene, wreckage or anything connected with it until an inspector gives permission, except to save life or relieve suffering, maintain an essential utility or public transportation, or prevent unnecessary damage to property.

Critical injury (Reg. 834, as explained in the JHSC guide)

  • An injury of a serious nature that places life in jeopardy, produces unconsciousness, results in substantial loss of blood, fractures a leg or arm (not a finger or toe), amputates a leg, arm, hand or foot (not a finger or toe), burns a major portion of the body, or causes loss of sight in an eye.

other notices

  • If a person is disabled from usual work or needs medical attention because of an accident, explosion, fire or workplace violence, the employer gives written notice within four days to the committee, representative and union (and a Director if an inspector requires).
  • If the employer learns a worker or former worker has an occupational illness or a WSIB claim for one, written notice goes within four days to a Director, the committee or representative, and the union.
  • At a project site or mine, certain incidents (such as equipment failure, cave-in or flood) require written notice within two days.

OHSA s. 9(31)

  • Worker members designate one or more worker members to investigate deaths and critical injuries; the member may inspect the place and any equipment, but must not disturb the scene, and reports findings to the committee and a Director; findings may be shared with an inspector.

good investigations

  • Investigations look for root causes so the incident does not happen again; an effective reporting system catches near misses too.
  • Tools: careful note taking, interviewing, data analysis, report writing, recommendations and a compliance schedule.
  • The ministry, police and workplace parties each have roles; JHSC members may experience stress or trauma and should seek help if needed.

Study the Reporting and investigating incidents rules as flashcards →

Other topics

Full practice tests