Confined Space Practice Test 4

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. Why should work outside a confined space be checked before entry?

   1. Outside work is always noisier than inside work
   2. Outside work can affect safety or air quality inside
   3. Outside workers need to sign the inside entry permit
   4. Outside work must stop for the whole day

2. For cold work in Ontario, flammable gas must be kept below what level?

   1. 25 per cent of the LEL
   2. 10 per cent of the LEL
   3. 50 per cent of the LEL
   4. 5 per cent of the UEL

3. In B.C., how often must a standby person check on workers in a low hazard atmosphere?

   1. Once at the start of the shift
   2. Only when called by radio
   3. At least every 2 hours
   4. At least every 20 minutes

4. Before a confined space is closed up after the job, what must be confirmed?

   1. That the fans are left running
   2. That the permit has been laminated
   3. That no person is still inside
   4. That the lid has been repainted

5. Where should air removed from a confined space be exhausted?

   1. Into the nearest office window
   2. Back into the same space again
   3. Away from workers outside the space
   4. Toward the attendant standing at the hatch

6. In Ontario, when must a space with oxygen or toxic hazards be purged or ventilated?

   1. Only after the first worker inside reports feeling dizzy or ill
   2. Only at the end of the shift, before the space is closed
   3. Before entry, so acceptable levels last while workers are inside
   4. Only if a ministry inspector is present at the site

7. 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

8. Why does the permit record each worker's entries and exits?

   1. So the attendant knows when to take a lunch break
   2. So it is known at all times who is inside the space
   3. So workers can be paid by the minute spent inside it
   4. So the client can bill extra for each entry made

9. 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

10. What must the written hazard assessment consider?

    1. Only the cost of the controls compared with the cost of the work
    2. Only the hazards that caused injuries in this space in the last five years
    3. Hazards from the space itself and hazards that may develop during the work
    4. Only hazards that can be seen from the entrance with a flashlight

11. A space normally has a gas hazard, but fans run continuously to control it. Is it still a confined space?

    1. No; once the ventilation runs, the regulation stops applying to it
    2. No; only spaces without any fans are covered by the regulation
    3. Yes, but only on days when the fans are shut down for repair
    4. Yes; controlling a hazard does not eliminate the possibility of it

12. How does Ontario's regulation first require workers to be protected from hazardous substances entering through piping?

    1. By putting a warning sign on the pipe outside
    2. By asking the plant not to run that line today
    3. By blanking or disconnecting the piping
    4. By closing one valve and hoping it holds tight

13. 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

14. What should be an essential part of confined space training?

    1. Reading the regulation aloud once in class
    2. A video watched at home with no questions
    3. A written quiz with no practical part at all
    4. Hands-on practice with the equipment and PPE

15. Where must the attendant be stationed in Ontario?

    1. Inside, just below the hatch
    2. In the truck, with the radio on
    3. Outside and near the entrance
    4. In the site office, by the phone

16. What breathing protection should rescuers entering a hazardous atmosphere use?

    1. SCBA or a supplied-air respirator with an escape bottle
    2. No respirator, if they move very quickly
    3. A wet cloth held over the nose and mouth
    4. A paper dust mask, which filters out most toxic gases

17. In B.C., how close to entry must pre-entry atmospheric testing be completed?

    1. Not more than one week before the job begins
    2. Not more than 24 hours before a worker enters
    3. Not more than 20 minutes before a worker enters
    4. Any time during the same calendar month

18. Does Ontario certify confined space trainers or training programs?

    1. Yes; certificates must be renewed at a ServiceOntario office
    2. Yes; workers must pass a government confined space exam
    3. Yes; only ministry-certified trainers may teach the course
    4. No; the employer must make sure the training is adequate

19. How often must B.C. rescue persons hold a practice drill?

    1. At least once a year
    2. Once every five years
    3. Never; training is enough
    4. Only after a real rescue

20. 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

21. A steel tank has been sealed for months and its walls are rusting. What hazard may have developed?

    1. Explosive dust, because rust floats in the air
    2. No hazard, because rust is a harmless solid
    3. Oxygen enrichment, because rusting releases oxygen
    4. Oxygen deficiency, because rusting uses up oxygen

22. Ideally, when should a gas monitor be calibrated or bump-tested?

    1. Never, since monitors calibrate themselves
    2. Only after it has been dropped in water or mud
    3. Once, when the monitor is first bought new
    4. Just before each use, or as the manufacturer directs

23. 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

24. Which of these is a typical example of a confined space?

    1. A staffed control room with air handling
    2. A school classroom with large windows
    3. A storage tank entered through a manhole
    4. An office boardroom

25. Besides the 5 % LEL limit, which condition must be met for hot work in a space that may contain flammable gas?

    1. The space is tested once a week only
    2. The oxygen level is raised above 23 %
    3. The atmosphere is continuously monitored
    4. The welder works alone with no attendant