Confined Space Practice Test 1

All 25 questions in this test

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

1. What is blanking?

   1. Painting a pipe white so it is easy to see from the hatch
   2. Inserting a solid metal plate between two pipe flanges
   3. Turning a valve handle a quarter turn closed
   4. Wrapping a pipe in tape to stop small leaks

2. 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

3. Which topic must the confined space plan include?

   1. The company's sales targets
   2. Parking rules for visitors
   3. On-site rescue procedures
   4. Workers' vacation schedules

4. 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

5. When is continuous monitoring required under Ontario's rules?

   1. Only when the confined space is larger than a standard shipping container
   2. During hot work where flammable gas may be present, or in an inerted space
   3. Only when the attendant has fewer than five years of experience
   4. Only on weekends, when fewer supervisors are on site to check

6. Which task is an example of cold work?

   1. Grinding a steel plate
   2. Cutting with a torch
   3. Welding a cracked pipe joint
   4. Adjusting a valve by hand

7. 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

8. What must the attendant be provided with?

   1. A second job to do while the entrants are working
   2. A ladder to climb in and help whenever it is needed
   3. A device for summoning an adequate rescue response
   4. A key to lock the hatch while workers are inside

9. Which statement about the size of confined spaces is correct?

   1. A confined space must be smaller than a car
   2. A confined space is not necessarily small
   3. A confined space must have one opening
   4. A confined space must be underground

10. Where should the fresh-air supply and the exhaust be placed?

    1. Both at the very bottom
    2. As far apart as possible
    3. Side by side at the hatch
    4. In the same small opening

11. Besides entrants, who else needs confined space training under Ontario's guidance?

    1. Attendants and rescue workers
    2. Visitors who pass by the site
    3. Nobody else needs any training
    4. Only the company's accountants

12. If mechanical ventilation is needed to keep the air safe, what else does Ontario require?

    1. A spare fan stored in the office down the hall
    2. A warning system and exit procedure for ventilation failure
    3. Nothing else, as long as the fan is fairly new
    4. A second attendant who stands inside the space with the workers

13. 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

14. A single isolating valve is the only barrier against a poisonous gas line. What does the guideline say?

    1. It is adequate, if the valve was tested last year by the maker
    2. It is adequate, as long as the attendant watches the valve
    3. It is not adequate; something like a double block and bleed may be
    4. It is adequate, as long as the valve is painted bright red and tagged

15. 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

16. Why is simply closing a valve not enough to isolate a pipe into a confined space?

    1. Valves only work on water pipes
    2. A valve can leak or be opened by mistake
    3. Closing valves is illegal in Canada
    4. Valves are always made of soft plastic

17. Unless a competent person has decided otherwise after a risk assessment, how should a confined space be treated?

    1. As safe if it was safe yesterday
    2. As safe once the lid is open
    3. As hazardous
    4. As safe if it smells normal

18. Ontario rescue persons must be trained in which three areas?

    1. Fire inspection, building codes and electrical design work
    2. Rescue procedures, first aid and CPR, and the rescue equipment
    3. Welding, forklift driving and crane hand signals used on the site
    4. Accounting, payroll and the company's sales procedures

19. Why must the size of the space's openings be considered when choosing rescue equipment?

    1. Larger openings require more expensive equipment to be purchased
    2. Small openings mean that no rescue equipment is needed at all
    3. Opening size only matters for the paperwork, not the rescue
    4. Equipment and rescuers must fit through the entry and exit points

20. 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

21. 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

22. How does a "competent person" differ from a person with adequate knowledge, training and experience?

    1. There is no difference; the two terms mean exactly the same thing
    2. A competent person can also organize the work and knows the law
    3. A competent person must hold a university engineering degree
    4. A competent person only needs to be the most senior worker present

23. A street manhole is next to busy traffic. Which contaminant may enter it from outside?

    1. Extra oxygen pushed in by passing trucks
    2. Chlorine from nearby swimming pools
    3. Ozone created by the traffic lights
    4. Carbon monoxide from vehicle exhaust

24. Does Ontario law require the entry permit to be posted at the entrance?

    1. No, and workers do not need to know where the permit is
    2. No, but everyone involved must know where it is
    3. Yes, and a second copy must be mailed to the ministry
    4. Yes, it must be nailed to the hatch or the permit is invalid

25. What communication must the attendant keep with workers inside?

    1. No contact, so the workers can concentrate
    2. Constant communication using the method in the plan
    3. A wave through the hatch at the start of the job
    4. A phone call from the site office about every two hours