Confined Space Mock Exam 3

All 40 questions in this test

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

1. In Ontario, when must an employer have a written confined space program?

   1. Before any worker enters a confined space
   2. Within 30 days after the first entry is made
   3. Only after an inspector asks to see it
   4. Only if more than 20 workers are employed

2. Why must ventilation continue while work is being done in the space?

   1. To dry the paint on the walls more quickly
   2. Work can create contaminants and conditions can change
   3. To keep the attendant cool while they wait outside the space
   4. Because fans must run to keep their warranty valid

3. What does inerting a space with nitrogen do?

   1. Cleans the walls of the space so no residue remains
   2. Removes the fire hazard but leaves too little oxygen to breathe
   3. Adds oxygen so workers can breathe more easily inside the space
   4. Makes the space safe to enter with no breathing equipment

4. Two manholes lead into separate but similar confined spaces. How many entry permits are needed?

   1. One per week for the crew
   2. One for all spaces on the street
   3. None, if they are similar
   4. One for each confined space

5. Before hot work in a confined space, what should be done with surfaces coated in combustible material?

   1. Leave them alone
   2. Paint over them first
   3. Clean or shield them
   4. Heat them first

6. On a construction project, how long must confined space records be retained after the project ends?

   1. One week
   2. Six months
   3. Five years
   4. One year

7. What is "hot work" in Ontario's confined space regulation?

   1. Work that can produce a source of ignition
   2. Work done during the night shift only
   3. Work done when the air is above 30 °C inside
   4. Work that makes the worker sweat a lot

8. How must test results be recorded when continuous monitoring is used?

   1. At adequate intervals set by the plan
   2. Only if an alarm goes off during the work
   3. Only at the end of the year
   4. They never need to be recorded

9. What is the purpose of the entry permit?

   1. To replace the hazard assessment and the written plan
   2. To prove the job was billed to the customer at the right rate
   3. To record who is allowed to drive company vehicles
   4. To tell workers the hazards and controls before anyone enters

10. Which atmospheric information goes on the entry permit?

    1. The results of the atmospheric tests
    2. Only the brand of the gas monitor used
    3. Only a note saying the air smelled fine
    4. Nothing; test results are kept secret

11. Why is mechanical ventilation usually needed instead of relying on natural air currents?

    1. Mechanical fans always add oxygen-rich air from compressed tanks
    2. Fans make the space quieter so workers can talk better
    3. Natural air currents are usually unreliable and insufficient
    4. Natural air currents are banned by every province's law

12. Can calling 911 be an employer's confined space rescue plan in Ontario?

    1. Yes, as long as the attendant has a working phone
    2. No; 911 does not replace on-site rescue procedures
    3. Yes, if the space is within 10 minutes of a fire hall
    4. Yes, for any confined space smaller than a garage

13. What must a competent person check before each shift while a permit is in use?

    1. That the client has paid for the work done so far
    2. That every entrant has had lunch and a coffee break
    3. That the entry permit still complies with the plan
    4. That the space has been repainted since the last shift

14. When does entry into a confined space legally begin in Ontario?

    1. Only after the worker has been inside for one full minute
    2. As soon as any part of the body breaks the plane of the opening
    3. Only when the worker's whole body is inside the space
    4. Only when the worker's feet touch the floor at the bottom of it

15. At around 16 per cent oxygen, what does the Ontario guideline say happens?

    1. Judgement and breathing become impaired
    2. Fire risk becomes extreme in the space
    3. Nothing happens; 16 % is normal for indoor air
    4. Death occurs within seconds every time

16. There is a chance someone could wander into an open confined space. What does Ontario require?

    1. Secure the entrance, or use barricades, warning signs or both
    2. Leave it open, since workers know the space is dangerous
    3. Paint the entrance red and do nothing else about it
    4. Post a guard there only on the days when the inspector visits

17. What does Ontario require for getting in and out of a confined space?

    1. A ladder only for the first worker, then a jump down
    2. An adequate means of entering and exiting for all entrants
    3. A single rope for all entrants, tied to a nearby vehicle
    4. No special means, as long as workers are fit and agile

18. Before entering a grain bin or a tank of liquid, what should be done about the contents?

    1. Add water so the contents become heavier and do not shift
    2. Leave them, since they help keep the space stable underfoot
    3. Remove them, or put a barrier in place to stop them flowing in
    4. Walk on top of the grain to pack it down firmly before working

19. Outside construction projects, how often must confined space training be reviewed in Ontario?

    1. Never, once the course certificate has been issued
    2. At least once a year, and when circumstances change
    3. Only when a worker is injured in a confined space
    4. Once every five years, unless an inspector asks

20. If welding is planned inside the space, what must the permit contain?

    1. A note that the attendant will also do the welding
    2. Adequate provisions and control measures for the hot work
    3. Only the welder's certificate number and photograph
    4. Nothing more, since welding is covered by the fire code only

21. Which task is part of the attendant's assistance role in Ontario's guideline?

    1. Passing in fresh-air packs and other protective equipment
    2. Doing the hot work inside so the entrants do not have to
    3. Signing the workers' timesheets at the end of the day
    4. Moving the company vehicles parked near the hatch

22. Who carries out the confined space hazard assessment in Ontario?

    1. The newest worker on the crew, as part of learning
    2. A ministry inspector, who must approve every assessment before use
    3. A person with adequate knowledge, training and experience
    4. Any worker on the crew, who does not need to sign or date the document

23. When may a worker enter a space containing airborne combustible dust at a level that could explode?

    1. Any time, if the worker only uses hand tools and moves slowly
    2. Not at all, unless it is inerted and other conditions are met
    3. Any time, as long as the worker wears a dust mask and safety glasses
    4. Only during the day, when lighting inside is better for seeing

24. Which item must an Ontario entry permit include?

    1. The cost of the job to the client
    2. The name of the attendant
    3. The entrants' home phone numbers
    4. The weather forecast for the week

25. Why must pure oxygen never be used to "freshen" the air in a confined space?

    1. It greatly increases the risk of fire and explosion
    2. It is heavier than air and sinks to the floor
    3. It makes gas monitors stop working properly inside
    4. It is too expensive to buy for regular work

26. Which hazard does section 14(d) of Ontario's regulation address with free-flowing materials?

    1. Drowning, engulfment, entrapment and suffocation
    2. Slips on wet floors near the entrance only
    3. Noise, vibration and poor lighting inside the space
    4. Sunburn while working at the open hatch

27. A worker cleans the inside of a tank with a solvent. How can this change the space's atmosphere?

    1. It cannot change the air, since the tank was tested before entry
    2. It adds oxygen to the space, since solvents release oxygen
    3. The work itself can create solvent vapours inside the space
    4. It removes every hazard, since cleaning makes the tank safer

28. Where possible, from where should a rescue be done?

    1. From the site office, by radio instructions
    2. From outside the confined space
    3. From the far end of the space, through a new hole
    4. From inside, as close to the victim as possible

29. Where should the use of mechanical ventilation be noted?

    1. On the entry permit
    2. On the fan's box
    3. In a personal diary
    4. Nowhere at all

30. Organic material is decomposing at the bottom of a pit. Which gases can it produce?

    1. Only harmless water vapour
    2. Argon and neon gas only, nothing else
    3. Pure oxygen and helium gas
    4. Methane and hydrogen sulphide

31. What is a double block and bleed system?

    1. Two pipes joined with a hose so any leak bleeds into a drum
    2. A blank plate fitted with two drain holes drilled through it
    3. Two closed, locked-out valves with a vent locked open between them
    4. One valve closed twice over to be sure it stays shut during the work

32. Why should a confined space be tested at several levels, top to bottom?

    1. The meter only works when it is moved up and down quickly
    2. Gases can form layers and pockets at different heights
    3. Oxygen is always highest at the very bottom of any space
    4. The law requires exactly ten readings for every test

33. A combustible gas meter calibrated with pentane is used where methane may be present. What should the user know?

    1. It cannot detect methane at all, so it must never be used in that space
    2. It only works if the space also contains some pentane
    3. It reads every combustible gas exactly the same way as pentane
    4. It reads methane differently, so results need careful interpretation

34. How often must an entry permit be issued in Ontario?

    1. Once a year for each confined space on the site, in January
    2. Once for each worker, valid for their whole career
    3. Separately, each time work is to be done in the space
    4. Only for the first entry into a new confined space

35. In Ontario's regulation, what is the difference between a "sample" and a "test"?

    1. There is no difference; the two words mean the same thing
    2. A sample is for oxygen only; a test is for toxic gases only
    3. A sample is taken by a lab; a test is done by the attendant
    4. A sample is one reading; a test is a collection of samples

36. In B.C., what does "clean respirable air" in a confined space contain?

    1. Any oxygen level, as long as it does not smell bad
    2. About 16 % oxygen and no carbon dioxide at all
    3. About 20.9 % oxygen and no measurable flammable gas
    4. About 25 % oxygen and a small amount of methane

37. Who must receive confined space training in Ontario?

    1. Every worker who enters or does related work
    2. Only workers with less than one year of service
    3. Only the attendant, since others are supervised
    4. Only supervisors who sign the entry permits

38. What must the employer provide each worker who enters a confined space?

    1. A bonus for each hour the worker spends inside the space
    2. Adequate PPE, clothing and devices under the plan
    3. A written promise that nothing will go wrong
    4. A personal gas monitor bought by the worker

39. Which feature is part of B.C.'s definition of a confined space but not Ontario's?

    1. Limited or restricted entry or exit that may complicate rescue
    2. Being large enough for a worker to enter and do the work
    3. Not being designed or intended for continuous human occupancy
    4. Being fully or partly enclosed on several sides of the space

40. Which gas must never be used to ventilate a confined space?

    1. Filtered fresh air
    2. Supplied breathing air
    3. Pure oxygen
    4. Clean outdoor air