A 36-foot ladder is set using a 4-to-1 ratio. How far should the base be from the wall?
Correct Answer
C) 9 feet.
At a 4-to-1 setup ratio, 36 feet divided by 4 equals 9 feet.
Why This Is the Correct Answer
At a 4-to-1 setup ratio, 36 feet divided by 4 equals 9 feet.
Why the Other Options Are Wrong
Option A: 7 feet.
7 feet. is below the supported result for ladder setup calculation; it likely uses the wrong base, period, or account bucket.
Option B: 8 feet total.
8 feet total. is below the supported result for ladder setup calculation; it likely uses the wrong base, period, or account bucket.
Option D: 10 feet total.
10 feet total. is above the supported result for ladder setup calculation; it likely adds an unsupported amount or compares the wrong financial base.
Memory Technique
Ladder drawer for Checking Placement: label number-to-stated before counting dollars.
Reference Hint
Study anchor (closed-book): memorize Ladder setup calculation from Cal/OSHA Title 8 Construction Safety Orders; CSLB B General Building. / Cal/OSHA Title 8 ladder setup; know the rule or calculation trigger without relying on exam-room lookup.
More Class B Trade Questions
A 2-inch horizontal sanitary branch must be installed at 1/4 inch fall per foot. What total fall is needed over a 24-foot run?
A 4-inch building drain is laid out with a required 1/8 inch fall per foot. What fall is required across 40 feet?
A rooftop unit schedule shows 3 tons of cooling. Using 12,000 Btu per hour per ton, what cooling capacity is this?
A pump motor is listed as 2 horsepower, and the coordination table asks for watts. Using 746 watts per horsepower, what is the approximate motor power?
A slab is 30 feet long, 18 feet wide, and 4 inches thick. How many cubic yards of concrete are needed before waste?
A footing is 80 feet long, 2 feet wide, and 12 inches deep. How many cubic yards of concrete are required before waste?
A patio subgrade must drain at 2 percent away from the building for 20 feet. What total drop is required?
A building pad needs 150 compacted cubic yards of fill. If the borrow material shrinks 10 percent after compaction, about how many loose cubic yards should be hauled in?
A roofing estimate shows 2,850 square feet of roof area. How many roofing squares is that?
A waterproof deck surface is 14 feet deep and must slope 1/4 inch per foot to the drain. What vertical fall is needed?