A tank contains 180 gallons of water. Using 8.34 lb/gal, what is the water weight?
Correct Answer
C) 1,501 lb
Water weight is 180 gal x 8.34 lb/gal = 1,501.2 lb, rounded to 1,501 lb.
Why This Is the Correct Answer
Water weight is 180 gal x 8.34 lb/gal = 1,501.2 lb, rounded to 1,501 lb.
Why the Other Options Are Wrong
Option A: 834 lb
water volume weight, choice b: 834 lb backs into 100 when divided by 8.34; the accepted setup gives 179.98 on that same base.
Option B: 1,334 lb
water volume weight, choice c: 1,334 lb backs into 159.95 when divided by 8.34; the accepted setup gives 179.98 on that same base.
Option D: 1,800 lb
water volume weight, choice d: 1,800 lb backs into 10 when divided by 180; the accepted setup gives 8.34 on that same base.
Memory Technique
Picture a label labeled water volume weight: finish every operation before accepting 1,501 lb.
Reference Hint
Open Mechanical and Electrical Systems for Construction Managers, 4th Ed., 2024; use by topic index - water weight / volume / pressure head to confirm that Water weight is 180 gal x 8.34 lb/gal = 1,501.2 lb, rounded to 1,501 lb.
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