Working at Heights 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. There is not enough clearance below for a shock absorber to deploy fully. What does Ontario's regulation say?

   1. Tie a knot in the lanyard to shorten the shock absorber
   2. Do not use a shock absorber that could make the worker hit below
   3. Use two shock absorbers joined together for extra protection below
   4. Ignore the clearance, since shock absorbers are always required

2. Why must a worker hanging in a harness after a fall be rescued promptly?

   1. Hanging in a harness can affect the body, and self-rescue may fail
   2. Because the lanyard must be returned to the supplier the same day
   3. Because the shock absorber will keep stretching until the worker lands
   4. Because the harness will automatically release the worker after a few minutes

3. Before using a step-ladder, what must be done?

   1. Remove the spreaders for space
   2. Open the legs fully and lock the spreaders
   3. Lean it closed against the nearest wall
   4. Stand it on a wooden pallet for extra height

4. Where must the intermediate rail be located?

   1. Midway between the top rail and the toe board
   2. Right on top of the toe board at floor level only
   3. Anywhere the installer finds convenient
   4. Above the top rail as an extra hand grip

5. Which is acceptable to protect workers from an opening in a floor?

   1. A sheet of cardboard placed loosely on top of the hole for now
   2. A secured, identified cover able to support at least 2.4 kN/m²
   3. A note in the site office saying the hole exists
   4. A traffic cone set beside the opening during the day

6. What is the difference between fall restraint and fall arrest?

   1. Restraint prevents a fall; arrest stops a fall that has started
   2. Restraint is for ladders only; arrest is for roofs only
   3. Restraint stops a fall halfway down; arrest stops it at the ground
   4. There is no difference; both terms mean the same thing

7. What must be true of a vertical lifeline's lower end?

   1. It reaches the ground or has a positive stop
   2. It is tied around the worker's own waist
   3. It is left hanging loose midair
   4. It is cut short to save weight

8. What does three-point contact on a ladder mean?

   1. Two hands and a foot, or two feet and a hand, on the ladder
   2. Three workers holding the ladder steady at all times below
   3. Three rungs between each step you take going up or down
   4. Three ties fastening the ladder to the structure

9. Why must horizontal lifelines be engineered?

   1. Their anchors can face extreme forces in a fall
   2. They are cheaper when engineered
   3. They are only used indoors
   4. They are always made of thin steel cable

10. Which harness may be needed on a construction project with an electrical arc flash hazard?

    1. A safety belt with an extra-long wire rope lanyard attached
    2. Any standard class A harness with the usual steel connectors
    3. An ADELP harness rated for arc flash, with compatible connectors
    4. No harness, since electrical work never involves heights

11. How must a fall arrest system be arranged?

    1. So the lanyard is as long as possible to give more freedom of movement
    2. So the anchor is always below the worker's feet
    3. So the worker can reach any edge of the roof without limits
    4. So the worker cannot hit the ground or an object or level below

12. When choosing a fall protection system, what should be considered first?

    1. Guardrails or barriers
    2. A longer lanyard
    3. A warning whistle
    4. A safety belt and short lanyard

13. Which three conditions does working at heights training ask learners to define and explain?

    1. Bottoming out, the pendulum effect and harness suspension
    2. Ladder slip, scaffold tip-over and crane tip-over on site
    3. Noise, dust and vibration on a roof
    4. Wind chill, heat stress and frostbite at heights

14. What is the minimum height of a guardrail toe board?

    1. 1 metre
    2. 300 millimetres
    3. 25 millimetres
    4. 89 millimetres

15. Who must approve a working at heights training program in Ontario?

    1. The local building inspector
    2. Any CSA-certified dealer
    3. The site's general foreman
    4. The Chief Prevention Officer

16. A ladder has a cracked side rail. What should be done?

    1. Use it only for short climbs today
    2. Tag it and take it out of service
    3. Paint over the crack to seal it
    4. Tape the crack and use it carefully

17. Who must be told the rescue procedures when workers may drown?

    1. Only the site owner
    2. All workers on the project
    3. Only the boat operator on duty
    4. Only visitors to the site

18. At what fall height is a guardrail required at the open edge of a floor, bridge or scaffold platform?

    1. 0.6 metres or more
    2. 2.4 metres or more
    3. 5 metres or more
    4. 10 metres or more

19. What is the purpose of a working at heights fall rescue plan?

    1. To prevent every fall from ever happening on site
    2. To rescue a worker after a fall has been arrested
    3. To decide who pays for damaged gear
    4. To record how many workers used harnesses

20. Whom must the employer appoint as a supervisor on a project with work at heights?

    1. The newest worker
    2. Any volunteer
    3. A competent person
    4. A relative of the owner

21. A fixed access ladder rises 7 m above the floor. What is required?

    1. A second ladder installed right beside the first
    2. A sign telling workers to climb slowly and carefully at all times
    3. A safety cage starting no more than 2.2 m above the floor
    4. Nothing extra, since fixed ladders are always safe

22. A worker using a fall restricting system slips farther than its design distance. What must happen?

    1. Report it at the end of the month in the safety log
    2. Take it out of service until the manufacturer certifies it
    3. Shorten the lanyard by tying a knot and keep working
    4. Keep using it, since nobody was injured in the slip

23. Why should synthetic lifelines be inspected carefully before each use?

    1. They change colour on hot and sunny days
    2. Sunlight and wear can weaken them over time
    3. They are made of paper inside
    4. They shrink in cold weather only

24. After a worker falls and the fall arrest system stops the fall, what happens to the system?

    1. It can be reused right away if it looks fine to the worker
    2. It is stored for a week and then used again normally
    3. It must be painted a different colour before reuse
    4. It is removed from service until the manufacturer certifies it

25. When must rescue procedures be in place relative to using fall arrest?

    1. At the end of the project
    2. Within a week after the first use on site
    3. Before any use of the fall arrest system
    4. Only after a worker actually falls

26. What is the maximum peak fall arrest force a fall arrest system may put on a worker?

    1. 50 kilonewtons
    2. 8 kilonewtons
    3. 2 kilonewtons
    4. 22 kilonewtons

27. What is one purpose of working at heights training according to the program standard?

    1. To license workers to drive elevating work platforms on roads
    2. To reduce falls from heights and the injuries and deaths they cause
    3. To replace the employer's duty to provide fall protection
    4. To qualify workers to design guardrails and anchors for engineers

28. An unsecured extension ladder is 8 m long. How far out should its base be from the point below its top?

    1. At least 6 m out, so the ladder lies almost flat
    2. Exactly 0.5 m, whatever the length of the ladder
    3. Right against the wall, with no gap at all at the base
    4. Between 2 m and about 2.7 m (one-quarter to one-third)

29. How should a full body harness fit?

    1. Loose enough to slip off over the head easily when sitting
    2. As tight as possible, even if it cuts off circulation
    3. Worn over the shoulders only, with leg straps left open
    4. Snug but allowing free movement, with loose straps tucked in

30. Working near energized electrical equipment while at heights adds what kind of danger?

    1. None, since height protects from electricity
    2. It makes harnesses work better than they usually do
    3. It only matters for workers on the ground
    4. A fall could bring the worker into contact with it

31. Which rescue equipment is required where workers may drown?

    1. A seaworthy boat with a lifebuoy, buoyant line and boat hook
    2. A set of ladders tied together along the dock
    3. A garden hose and a bucket left near the shore for emergencies
    4. A first aid kit kept in the site trailer only

32. A worker is on a 2.5 m high scaffold platform with an open side. What protection does the regulation require?

    1. A safety belt only
    2. Nothing below 3 m
    3. A guardrail system
    4. A warning sign only

33. Under Ontario's construction regulation, what is the first required method of protecting a worker from a fall?

    1. A safety net
    2. A warning sign
    3. A guardrail system
    4. A fall arrest system

34. How must a rope grab be installed on a lifeline?

    1. On any rope at all, whatever the diameter of the rope
    2. Top toward the anchor, on rope of the specified diameter
    3. Clipped directly to the guardrail instead of a lifeline
    4. Upside down, so it slides freely toward the ground in a fall

35. If a worker may drown at a project, how many workers trained in rescue must be available?

    1. At least one
    2. None
    3. At least two
    4. At least five

36. After a rescue, what happens to the fall arrest equipment that stopped the fall?

    1. It is reused right away by the rescued worker on the same job
    2. It is removed from service until the manufacturer approves it
    3. It is given to the rescuer as a spare set for future work
    4. It is stored and used again only for training sessions

37. What is the role of a safe work plan for work at heights?

    1. Identify fall hazards and share them with workers and supervisors
    2. Record the names of the workers who refused to climb a ladder
    3. Set the hourly wage for each worker who works on a roof
    4. List the brands of harness the company prefers to buy

38. A supervisor sees a worker on a roof edge without the required fall protection. What must the supervisor do?

    1. Ensure the worker uses the required protective devices
    2. Take a photo and post it online
    3. Report the worker to the police
    4. Ignore it if the job will be finished soon anyway

39. Why must employers add to an approved working at heights program?

    1. To cover their own workplace procedures and equipment
    2. Because approved programs are optional for employers
    3. To shorten the program to under an hour of training
    4. Because the ministry no longer approves any programs

40. A worker is told to work at an unprotected roof edge with no fall protection. What may the worker do under the OHSA?

    1. Refuse the work and report it to the supervisor or employer
    2. Refuse and go home for the rest of the week without telling anyone
    3. Do the work quickly, since refusals are not allowed on construction
    4. Call a news reporter before telling anyone at the workplace