Confined Space Awareness Course 2026

1. Frage 1 von 25

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

   • AIt is not built for people to stay in
   • BIt is always smaller than a car
   • CIt has no openings of any kind
   • DIt is always found below ground level
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   Antwort: 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. Frage 2 von 25

   Is a confined space always small?

   • ANo, but it is always underground
   • BYes, it is smaller than a closet
   • CYes, it fits only one person
   • DNo, it can be large, like a silo
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   Antwort: 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. Frage 3 von 25

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

   • AA machine shop
   • BA storage tank
   • CAn office
   • DA walk-in freezer
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   Antwort: B. A storage tank

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

4. Frage 4 von 25

   Normal air contains about how much oxygen?

   • A30%
   • B21%
   • C15%
   • D50%
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   Antwort: B. 21%

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

5. Frage 5 von 25

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

   • A15% to 19.5%
   • B19.5% to 23%
   • C25% to 30%
   • D10% to 15%
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   Antwort: B. 19.5% to 23%

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

6. Frage 6 von 25

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

   • AOxygen is far too costly to use this way
   • BOxygen makes the space far too cold
   • COxygen makes gas detectors stop working
   • DExtra oxygen makes fires far more likely
   Antwort anzeigen

   Antwort: 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. Frage 7 von 25

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

   • AThey push out oxygen
   • BThey are extremely loud
   • CThey are always burning
   • DThey make floors slippery
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   Antwort: A. They push out oxygen

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

8. Frage 8 von 25

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

   • AHydrogen sulphide
   • BClean, fresh air
   • CPlain water vapour
   • DHelium gas
   Antwort anzeigen

   Antwort: A. Hydrogen sulphide

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

9. Frage 9 von 25

   What is engulfment?

   • ASlipping on a wet ladder rung
   • BGetting lost inside a long dark tunnel
   • CBeing cut by moving machine parts
   • DBeing buried by grain, sand or liquid
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   Antwort: 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. Frage 10 von 25

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

    • APhones and radios never work inside
    • BThe floor is always wet and slippery
    • CEscape and rescue are much harder
    • DThe lighting is always switched off
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    Antwort: 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. Frage 11 von 25

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

    • AFrom outside, before anyone enters
    • BAt the entrance after work starts
    • CFrom the nearest office window
    • DFrom inside, after the first worker enters
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    Antwort: A. From outside, before anyone enters

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

12. Frage 12 von 25

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

    • A24 full hours
    • B8 hours
    • C20 minutes
    • D2 hours
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    Antwort: C. 20 minutes

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

13. Frage 13 von 25

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

    • A75% of the LEL
    • B100% of the LEL
    • C10% of the LEL
    • D50% of the LEL
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    Antwort: 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. Frage 14 von 25

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

    • A5% of the LEL or more
    • B25% of the LEL or more
    • CEntry is always allowed
    • D1% of the LEL or more
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    Antwort: 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. Frage 15 von 25

    What does LEL stand for in air testing?

    • ALow-energy lockout level
    • BLowest entry level
    • CLegal exposure limit
    • DLower explosive limit
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    Antwort: D. Lower explosive limit

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

16. Frage 16 von 25

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

    • AOnce each year for every space
    • BOnce for the whole life of the building
    • CEach time work is done in the space
    • DOnly when a new worker is hired
    Antwort anzeigen

    Antwort: 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. Frage 17 von 25

    Which item must an Ontario entry permit include?

    • AThe results of the air tests
    • BThe cost of the rescue equipment
    • CThe workers' home phone numbers
    • DThe forecast for the next week
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    Antwort: 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. Frage 18 von 25

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

    • AOutside and near the entrance
    • BAt the front gate
    • CInside the space with the workers
    • DIn the site office
    Antwort anzeigen

    Antwort: A. Outside and near the entrance

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

19. Frage 19 von 25

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

    • AClose the cover to trap the gas inside
    • BGo in at once to pull them out
    • CStay outside and call for rescue
    • DWait to see if they wake up
    Antwort anzeigen

    Antwort: 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. Frage 20 von 25

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

    • AAbout 25%
    • BWell under 1% of them
    • CAbout 5% at most
    • DAbout 60% or more
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    Antwort: D. About 60% or more

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

21. Frage 21 von 25

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

    • AOnly a phone for calling 911
    • BA visitor sign-in sheet at the gate
    • CA ready on-site rescue plan
    • DA first aid poster on the wall
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    Antwort: 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. Frage 22 von 25

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

    • AOnly at the very end
    • BEvery 20 minutes
    • CEvery 2 hours
    • DOnce per shift
    Antwort anzeigen

    Antwort: 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. Frage 23 von 25

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

    • APainted a bright colour only
    • BSecured, or barricaded and signed
    • CLeft open to let in fresh air
    • DWatched by a camera, nothing more
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    Antwort: 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. Frage 24 von 25

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

    • AThat the permit is thrown away
    • BThat the lights are turned off
    • CThat the gas detector is charging
    • DThat no one is still inside
    Antwort anzeigen

    Antwort: 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. Frage 25 von 25

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

    • AEntrants, attendants and rescuers
    • BOnly the local fire department
    • COnly the supervisor who signs off
    • DOnly the workers who go inside
    Antwort anzeigen

    Antwort: 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.

Tastatur: 1–4 zum Antworten, Eingabetaste für die nächste Frage.