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Confined Space Awareness Course 2026

This course is for workers in Canada, including security guards and site staff, who work near tanks, pits, vaults, sewers and similar spaces. It explains what a confined space is, its hazards, air testing, entry permits, attendants and rescue. It is awareness only: it does not train you to enter a confined space, act as an attendant or take part in a rescue, which require training from your employer.

  • Formation
  • Canada
  • 25 questions
  • Vérifié le 13 octobre 2026

En bref

Ce cours gratuit comprend environ 30 minutes de leçons et un test de 25 questions. Obtenez 80 % ou plus pour télécharger une attestation de réussite (privée, non accréditée). Vérifié à partir des sources officielles le 13 octobre 2026.

Commencez par les leçonsConfined Space Awareness Course: Lessons : environ 30 minutes de lecture. Chaque question du test est traitée dans les leçons.

Ce que vous allez apprendre

  • Recognize a confined space and common examples
  • Describe oxygen, flammable, toxic and engulfment hazards
  • Explain air testing, entry permits and their limits
  • Describe the attendant's role and why rescue must be planned
  • Keep unauthorized people out and respond safely in an emergency

Obtenez 80 % ou plus pour télécharger votre certificat.

  1. Question 1 sur 25

    Which of these is part of the general definition of a confined space?
    Voir la réponse

    Réponse: A. It is not built for people to stay in

    A confined space is not designed for continuous human occupancy, has limited entry or exit, and can be hazardous.

  2. Question 2 sur 25

    Is a confined space always small?
    Voir la réponse

    Réponse: D. No, it can be large, like a silo

    CCOHS notes that a confined space, despite its name, is not necessarily small. Silos and tanks can be very large.

  3. Question 3 sur 25

    Which of these is most likely to be a confined space?
    Voir la réponse

    Réponse: B. A storage tank

    Storage tanks are confined spaces. Ontario's guideline says offices, shops and walk-in freezers are designed for occupancy.

  4. Question 4 sur 25

    Normal air contains about how much oxygen?
    Voir la réponse

    Réponse: B. 21%

    Normal air is about 21% oxygen. Lower levels can cause collapse and death.

  5. Question 5 sur 25

    Under Ontario's confined spaces rules, oxygen outside which range is an atmospheric hazard?
    Voir la réponse

    Réponse: B. 19.5% to 23%

    Ontario treats oxygen below 19.5% or above 23% by volume as an atmospheric hazard.

  6. Question 6 sur 25

    Why should you never use pure oxygen to freshen the air in a confined space?
    Voir la réponse

    Réponse: D. Extra oxygen makes fires far more likely

    Too much oxygen greatly increases the risk of fire and explosion. CCOHS says never substitute oxygen for fresh air.

  7. Question 7 sur 25

    Nitrogen, argon and carbon dioxide can be deadly in a confined space. Why?
    Voir la réponse

    Réponse: A. They push out oxygen

    These simple asphyxiants displace oxygen. Unconsciousness or death can follow within minutes.

  8. Question 8 sur 25

    Which toxic gas does CCOHS name as a confined space hazard?
    Voir la réponse

    Réponse: A. Hydrogen sulphide

    CCOHS gives hydrogen sulphide and carbon monoxide as examples of toxic gases in confined spaces.

  9. Question 9 sur 25

    What is engulfment?
    Voir la réponse

    Réponse: D. Being buried by grain, sand or liquid

    Engulfment means being trapped or buried by shifting or collapsing bulk material, or by flooding liquid.

  10. Question 10 sur 25

    Why is a problem inside a confined space more dangerous than the same problem in an open room?
    Voir la réponse

    Réponse: C. Escape and rescue are much harder

    There is less margin for error, rescue and self-rescue are harder, ventilation is poor and conditions can change quickly.

  11. Question 11 sur 25

    Where should the air in a confined space first be tested?
    Voir la réponse

    Réponse: A. From outside, before anyone enters

    Air should be tested from outside the space before anyone enters.

  12. Question 12 sur 25

    In BC, pre-entry air testing must be done no more than how long before a worker enters?
    Voir la réponse

    Réponse: C. 20 minutes

    BC's OHS Regulation s. 9.25 requires testing to be completed not more than 20 minutes before entry.

  13. Question 13 sur 25

    Under Ontario's guideline, cold work (no sparks or flames) may be done only if flammable gas is below what level?
    Voir la réponse

    Réponse: C. 10% of the LEL

    Ontario's decision chart allows cold work below 10% of the lower explosive limit; hot work needs less than 5%.

  14. Question 14 sur 25

    In Ontario, at what flammable gas level is entry into a confined space not allowed at all?
    Voir la réponse

    Réponse: B. 25% of the LEL or more

    Ontario's guideline allows inspection only below 25% of the LEL. At 25% or more, entry is not permitted.

  15. Question 15 sur 25

    What does LEL stand for in air testing?
    Voir la réponse

    Réponse: D. Lower explosive limit

    Flammable gas readings are given as a percentage of the lower explosive limit (LEL).

  16. Question 16 sur 25

    In Ontario, how often must a new entry permit be issued?
    Voir la réponse

    Réponse: C. Each time work is done in the space

    Ontario's regulation (s. 10) requires a separate entry permit each time work is to be performed in a confined space.

  17. Question 17 sur 25

    Which item must an Ontario entry permit include?
    Voir la réponse

    Réponse: A. The results of the air tests

    The permit lists the location, work, hazards and controls, time period, attendant, entries and exits, equipment and atmospheric test results.

  18. Question 18 sur 25

    Where must the attendant be during a confined space entry in Ontario?
    Voir la réponse

    Réponse: A. Outside and near the entrance

    Ontario's guideline says the attendant stays outside and near the entrance and does not enter.

  19. Question 19 sur 25

    A worker inside collapses. The attendant is alone at the entrance. What should the attendant do?
    Voir la réponse

    Réponse: C. Stay outside and call for rescue

    The attendant must not enter. They call for emergency rescue right away, keep communication and support the rescue.

  20. Question 20 sur 25

    According to CCOHS, about what share of confined space deaths are would-be rescuers?
    Voir la réponse

    Réponse: D. About 60% or more

    CCOHS reports that more than 60% of confined space deaths are would-be rescuers.

  21. Question 21 sur 25

    In Ontario, what must be in place before anyone enters a confined space?
    Voir la réponse

    Réponse: C. A ready on-site rescue plan

    Ontario (s. 11) requires written on-site rescue procedures ready for immediate use and enough trained rescuers before entry. Calling 911 alone does not count.

  22. Question 22 sur 25

    In BC, in a low or moderate hazard confined space, a standby person must check on the workers inside at least how often?
    Voir la réponse

    Réponse: B. Every 20 minutes

    BC's OHS Regulation (ss. 9.34 and 9.35) requires checks at least every 20 minutes in low and moderate hazard spaces. In high hazard spaces the standby person must monitor the workers continuously.

  23. Question 23 sur 25

    Under Ontario's rules, how must entrances be handled if unauthorized entry is possible?
    Voir la réponse

    Réponse: B. Secured, or barricaded and signed

    Ontario (s. 17) requires each entrance to be secured, or to have adequate barricades, warning signs or both.

  24. Question 24 sur 25

    Before a confined space is closed up after work, what must be checked?
    Voir la réponse

    Réponse: D. That no one is still inside

    CCOHS says no confined space should be closed off until it has been verified that no person is inside.

  25. Question 25 sur 25

    Under Ontario's regulation, who must receive adequate training?
    Voir la réponse

    Réponse: A. Entrants, attendants and rescuers

    Ontario (s. 8) requires adequate training for every worker who enters a confined space or does related work, such as attendants and rescuers.

À savoir avant l’examen

  • All Canadian jurisdictions have confined space entry regulations, with small differences between them.
  • CCOHS reports that more than 60% of confined space deaths are would-be rescuers.
  • Ontario treats oxygen below 19.5% or above 23% by volume as an atmospheric hazard.
  • In Ontario, a separate entry permit is needed each time work is to be done in a confined space.
  • In BC, pre-entry testing must be done no more than 20 minutes before a worker enters.

Questions fréquentes

Can I enter a confined space after this course?

No. Only workers trained by their employer and authorized under the site's plan and entry permit may enter. Ontario, for example, requires adequate training for entrants, attendants and rescuers. This course is awareness only.

What should I do if someone collapses inside a confined space?

Do not go in. Raise the alarm, call the trained rescue team and 911 as your site plan says, and keep others out.

Why do so many rescuers die?

People rush in to help without testing the air or wearing supplied air, and are overcome by the same hazard. CCOHS reports more than 60% of confined space deaths are would-be rescuers.

L’attestation est-elle accréditée ou reconnue officiellement ?

Non. C’est une attestation de réussite privée, uniquement pour vos connaissances. Elle n’est reconnue, accréditée ni approuvée par aucun gouvernement, organisme de délivrance des permis, autorité de réglementation ou établissement d’enseignement, et elle ne remplace aucun permis, aucune certification ni aucune formation exigés par la loi.

Sources

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