A pump submittal converts pressure to feet of water head. Approximately how many feet of water head equal 1 psi?
Correct Answer
A) 2.31 ft
One psi is approximately 2.31 ft of water head. Other choices confuse unitless pressure with length, electrical conversion, or cubic-foot volume conversion.
Why This Is the Correct Answer
One psi is approximately 2.31 ft of water head. Other choices confuse unitless pressure with length, electrical conversion, or cubic-foot volume conversion.
Why the Other Options Are Wrong
Option B: 1.00 ft
Choice B (1.00 ft) is rejected because 1.00 ft is a different published number than the cited Pressure head value; Pressure-to-head conversion supports 2.31 ft. The cited answer is 2.31 ft.
Option C: 3.41 ft
In mechanical and plumbing, 3.41 ft is the wrong selection for Pressure head: 3.41 ft is a different published number than the cited Pressure head value; Pressure-to-head conversion supports 2.31 ft.
Option D: 7.48 ft
The trap in D is 7.48 ft. That selection is wrong because 7.48 ft is a different published number than the cited Pressure head value; Pressure-to-head conversion supports 2.31 ft; One psi equals approximately 2.31 ft of water head.
Memory Technique
Use a gate memory cue for pressure head: the stem's condition unlocks 2.31 ft.
Reference Hint
Open Mechanical and Electrical Systems for Construction Managers, 4th Ed., 2024; use the index entry or section for "Pressure-to-head conversion" to confirm that One psi is approximately 2.31 ft of water head.
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