AA 2:1 ratio (the base should be 1 foot out for every 2 feet of height)
BA 6:1 ratio (the base should be 1 foot out for every 6 feet of height)
CDirectly vertical against the structure
DA 4:1 ratio (the base should be 1 foot out for every 4 feet of height)
✓ Correct answer: D. A 4:1 ratio (the base should be 1 foot out for every 4 feet of height)The proper ladder angle follows the 4-to-1 rule: for every 4 feet of height, the base of the ladder should be 1 foot away from the wall or structure. This provides optimal stability and reduces the risk of the ladder tipping or sliding.
Keep practising. Use the free PVIS Test Prep PDF, watch the YouTube walkthrough, or unlock all 10 web questions with timed mock exams.
Theory