A pedestrian route is 210 feet long with cones every 30 feet, including both ends. How many cones are needed?
Correct Answer
A) 8 cones.
Two hundred ten feet divided by 30 feet gives 7 spaces; including both ends requires 8 cones.
Why This Is the Correct Answer
Two hundred ten feet divided by 30 feet gives 7 spaces; including both ends requires 8 cones.
Why the Other Options Are Wrong
Option B: 7 cones total.
7 cones total. is below the supported result for traffic control calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 9 cones total.
9 cones total. is above the supported result for traffic control calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 10 cones total.
10 cones total. is above the supported result for traffic control calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Measure to feet, adjust for divided, then let Setting Pedestrian set the finish line.
Reference Hint
Study anchor (closed-book): memorize Traffic control calculation from Cal/OSHA Title 8 Construction Safety Orders; CSLB B General Building. / Cal/OSHA Title 8 pedestrian and traffic control concepts; 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?