A pump schedule lists a motor in horsepower, but the electrical coordination table uses watts. Which conversion should be recognized for one horsepower?
Correct Answer
D) 746 W
One mechanical horsepower is approximately 746 watts. Other choices confuse Btu-per-hour conversion, metric rounding, or an undersized motor estimate.
Why This Is the Correct Answer
One mechanical horsepower is approximately 746 watts. Other choices confuse Btu-per-hour conversion, metric rounding, or an undersized motor estimate.
Why the Other Options Are Wrong
Option A: 3412 W
Choice A (3412 W) is rejected because 3412 W is a different published number than the cited Power conversion value; Mechanical power unit conversion supports 746 W. The cited answer is 746 W.
Option B: 500 W
In mechanical and plumbing, 500 W is the wrong selection for Power conversion: 500 W is a different published number than the cited Power conversion value; Mechanical power unit conversion supports 746 W.
Option C: 1000 W
The trap in C is 1000 W. That selection is wrong because 1000 W is a different published number than the cited Power conversion value; Mechanical power unit conversion supports 746 W; One horsepower is approximately 746 watts.
Memory Technique
File power conversion under a label: condition first, number or duty second, answer 746 W.
Reference Hint
Open Mechanical and Electrical Systems for Construction Managers, 4th Ed., 2024; use the index entry or section for "Mechanical power unit conversion" to confirm that One mechanical horsepower is approximately 746 watts.
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