A trench run is 168 ft long and requires bedding 3 ft wide by 0.5 ft deep. How many cubic yards of bedding are needed?
Correct Answer
D) 9.3 cu yd
Bedding volume is 168 x 3 x 0.5 = 252 cu ft; 252 / 27 = 9.3 cu yd.
Why This Is the Correct Answer
Bedding volume is 168 x 3 x 0.5 = 252 cu ft; 252 / 27 = 9.3 cu yd.
Why the Other Options Are Wrong
Option A: 8.0 cu yd
bedding volume - trench run, choice a: 8.0 cu yd is wrong because 8.0 cu yd reflects a different quantity stage than the final takeoff.
Option B: 10.0 cu yd
bedding volume - trench run, choice c: 10.0 cu yd reflects a different quantity stage than the final takeoff.
Option C: 18.7 cu yd
bedding volume - trench run, choice d: 18.7 cu yd is wrong because 18.7 cu yd reflects a different quantity stage than the final takeoff.
Memory Technique
Picture a scope box labeled bedding volume - trench run: finish every operation before accepting 9.3 cu yd.
Reference Hint
Open Pipe and Excavation Contracting, 2011; use by topic index - bedding / backfill / compaction to confirm that Bedding volume is 168 x 3 x 0.5 = 252 cu ft; 252 / 27 = 9.3 cu yd.
More NASCLA Questions
Bid instructions require bid security with each sealed bid. Which purpose should the estimator associate with that requirement?
A wood deck surface has 320 sf of coverage. Boards have a 5-1/2 in. actual face width, and the order includes an 8 percent cutting allowance. What linear footage is closest?
Using the dimensions shown for the stabilized construction entrance, what is the plan area?
A reroof area requires 14,720 sf of rigid insulation. Boards are 4 ft by 8 ft, and the order includes 5 percent waste. How many boards are needed?
Two addenda revise the drawings before bid day. What must a responsive bidder normally do with those addenda?
A utility trench is 180 ft long, 3 ft wide, and 7 ft deep with vertical sides inside a trench shield. What excavation volume is required?
A 120 ft long Type C trench is cut with a 4 ft bottom width and a 6 ft depth. If side slopes are 1-1/2 horizontal to 1 vertical, what excavation volume is closest?
A storm pipe run needs 240 ft of bedding, 4 ft wide and 6 in. thick. Including a 10 percent ordering allowance, how many cubic yards of bedding aggregate are needed?
A mass excavation produces 1,180 loose cubic yards of material for off-site disposal. End-dump trucks can haul 18 loose cubic yards per trip. What truck count is required?
An asphalt-shingle roof has a slope of 3:12. Under the IBC low-slope asphalt-shingle provisions, what underlayment arrangement is required?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass
Project Management
60 questions · 70% to pass
Related Study Resources
Previous Question
Which finish level is commonly specified where critical lighting or gloss paint makes minor imperfections visible?
Next Question
Fresh concrete drops too far through congested reinforcing and the coarse aggregate collects at the bottom while paste flows ahead. Which defect is occurring?