A temporary water tank contains 1,250 gallons during a pressure test. Using 8.34 lb/gal, what water weight should be considered?
Correct Answer
B) 10,425 lb
Water weight is 1,250 x 8.34 = 10,425 lb. Other choices use 7.5 lb/gal, 9 lb/gal, or a rounded 9.6 lb/gal value.
Why This Is the Correct Answer
Water weight is 1,250 x 8.34 = 10,425 lb. Other choices use 7.5 lb/gal, 9 lb/gal, or a rounded 9.6 lb/gal value.
Why the Other Options Are Wrong
Option A: 9,375 lb
water weight, choice a: 9,375 lb omits a required add-on/subtraction; the numeric gap is 1,050.
Option C: 11,250 lb
water weight, choice c: 11,250 lb adds an extra unstated add-on/subtraction; the numeric gap is 825.
Option D: 12,000 lb
water weight, choice d: 12,000 lb adds an extra unstated add-on/subtraction; the numeric gap is 1,575.
Memory Technique
Store water weight with its last math move; nearby answers are usually unfinished versions of 10,425 lb.
Reference Hint
Open Mechanical and Electrical Systems for Construction Managers, 4th Ed., 2024; use the index entry or section for "Water load calculation" to confirm that Water weight is 1,250 x 8.34 = 10,425 lb.
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