A rectangular room is 20 feet by 15 feet and has one 3-foot door plus one 6-foot opening. How many linear feet of baseboard are needed before waste?
Correct Answer
B) 61 linear feet.
The room perimeter is 2 x (20 + 15) = 70 feet. Subtracting 9 feet of openings gives 61 linear feet.
Why This Is the Correct Answer
The room perimeter is 2 x (20 + 15) = 70 feet. Subtracting 9 feet of openings gives 61 linear feet.
Why the Other Options Are Wrong
Option A: 58 linear feet.
58 linear feet. is below the supported result for linear footage takeoff; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 64 linear feet.
64 linear feet. is above the supported result for linear footage takeoff; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 70 linear feet.
70 linear feet. is above the supported result for linear footage takeoff; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Measure to room, adjust for perimeter, then let Checking Finish set the finish line.
Reference Hint
Study anchor (closed-book): memorize Linear footage takeoff from CSLB B General Building Study Guide; California Building Code, Title. / CSLB B General Building Study Guide estimating 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?