Safety, Tools, and Job Site Practices
Safety, Tools, and Job Site Practices
This domain tests whether you can spot hazards before work starts and choose controls that match the risk: elimination, substitution, engineering controls, administrative controls, and PPE. Expect questions on circular-saw kickback, ladder setup, scaffold access, electrical cords, housekeeping, and wood-dust exposure.
Core rules
- Wear eye and hearing protection when cutting; use dust collection or respiratory protection for prolonged sanding.
- Keep guards in place. A circular-saw blade should be sharp, the depth set about 1/4 in past the stock, and the offcut supported so it cannot pinch.
- Use three-point contact on ladders; set a straight ladder at about 1 ft out for every 4 ft of working height and extend it above the landing.
- Use GFCI protection for portable electric tools outdoors or in wet areas; inspect cords for damage.
- Clear walkways, stack lumber safely, and control dust and finish vapors.
Worked example
A ladder must reach a wall contact 12 ft above the ground. Using the 4:1 rule, set the base 12 ÷ 4 = 3 ft from the wall. If the ladder must extend 3 ft above a roof edge for access, choose a ladder long enough for the 12-ft contact plus extension, not one that only reaches the eave.
Traps
Removing a guard “for one cut,” standing on the top two rungs, using a damaged cord, and relying on PPE instead of guarding are common wrong answers. Also distinguish a ladder’s working length from its reach: the usable height is less than the labeled length.