RELATED MATHEMATICS FOR RELATED MATHEMATICS IN THE PIPE TRADES NAME DATE CHAPTER
ID: 3196860 • Letter: R
Question
RELATED MATHEMATICS FOR RELATED MATHEMATICS IN THE PIPE TRADES NAME DATE CHAPTER 3: FORMULAS REVIEW EXAM (Continued) 12. Plind the crosssectional area, in square feet, of a steel ppe with an outside diameter of 18". 13. A hot water storage tank has a diameter of 34° and is 72' long, Compute the capacity of the tank in gallons 14. A storage tank has a diameter of 32". Compute the pressure on the base of the tank in pounds per square inch if the total weight of the water in the tank is 9,000 lb. 15. What is the pressure exerted at the base of a water riser by a column of water in the riser 85 high? The grade of a drain line is the in inches divided by the distance in- 1 17. What is the total fall of a drain line if there is 30' of run at e per foot of grade? 14Explanation / Answer
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Outside diameter is 18'' or 18 inches
18inches of dia = 9 inches of radius [Since, d = 2r]
1 inch = .08333 feet
Therefore, the cross sectional area in sq. ft is pi*(9*0.0833333)^2
= 1.767 ft^2
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