Self-Test B-3.2: Use Ladders and Elevated Platforms

Complete Self-Test B-3.2 and check your answers.

1. The type of finish for a wooden ladder is:
   1. Oil-based paint
   2. Latex paint
   3. Solid colour stain
   4. Clear finish

2. Which of the following ladders is freestanding?
   1. Extension
   2. Step
   3. Single
   4. Fixed
3. A full body harness attached to a lifeline must be used when working on a scaffold higher than
   1. 2.1 m (7 ft.)
   2. 2.4 m (8 ft.)
   3. 3 m (10 ft.)
   4. 4.9 m (16 ft.)

4. The correct slope for single or extension ladders is:
   1. 1 up the slope of the ladder to 4 horizontal
   2. 2 up the slope of the ladder to 4 horizontal
   3. 3 up the slope of the ladder to 1 horizontal
   4. 4 up the slope of the ladder to 1 horizontal

5. Minimum size for the side rail of a 3 m (10 ft.) job-built single ladder is
   1. 38–38 mm (2–2 in.)
   2. 38–64 mm (2–3 in.)
   3. 38–89 mm (2–4 in.)
   4. 38–140 mm (2–6 in.)

6. The minimum distance that a single or extension ladder is required to project above the level to which it gives access, is
   1. 500 mm (20 in.)
   2. 600 mm (2 ft)
   3. 900 mm (3 ft)
   4. 1200 mm (4 ft)

7. What is the minimum width of a wooden scaffold plank?
   1. 140 mm (5½ in.)
   2. 184 mm (7¼ in.)
   3. 235 mm (9¼ in.)
   4. 286 mm (11½ in.)

8. What is the minimum height of a guardrail?
   1. 600 mm (24 in.)
   2. 750 mm (30 in.)
   3. 900 mm (36 in.)
   4. 1020 mm (40 in.)

9. At what maximum height does a scaffold require a guardrail?
   1. 1200 mm (4 ft)
   2. 2100 mm (7 ft)
   3. 2400 mm (8 ft)
   4. 3000 mm (10 ft)

10. Bolts or pins must be placed through the end frames and coupler pins when the scaffold is higher than one unit.
    1. True
    2. False

11. Casters for steel scaffolds must have:
    1. Rubber tires
    2. Ball bearings
    3. Leveling screws
    4. Brakes

12. What is the maximum height of a rolling scaffold?
    1. 2 times its minimum base dimension
    2. 2½ times its minimum base dimension
    3. 3 times its minimum base dimension
    4. 3½ times its minimum base dimension

13. Steel scaffolds fitted with casters also require:
    1. Sway braces
    2. Screw jacks
    3. Base plates
    4. Mud sills

Answer Key: Self-Test B-3.2 is on the next page.