Welcome to your Water Math Exam

1.
**How many feet of head would create a pressure of 130 psi?**

Hint

2.
**What would the psi at an outlet at elevation of 419 ****ft****?**

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3.
**Pump runs 18 hours and pumps 120,000 gallons what is ****gpm**** pumping rate?**

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4.
**How much would 150 gallons of water weigh?**

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6.
**How much force on 6" blind flange with 65 psi?**

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7.
**What would be the maximum pumping rate of a 30 ****hp**** pump with 100 ****ft**** of head?**

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8.
**City spends $166,000 per year and sells 750 MG, what is cost per 1,000 gallons?**

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9.
**How many gallons in an 80 ****ft**** diameter tank filled 20 ****ft****?**

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10.
**How many gallons of water in an 18 inch pipe that is 5,500 ****ft**** long?**

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11.
**How long will a 10,000 gallon tank flow at 250 ****gpm****?**

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12.
**How many gallons in a rectangular tank 5 ****ft**** x 8 ****ft**** x 5 ****ft****?**

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13.
**How many hours would it take to fill a 90 ****ft**** dia. tank 40 feet high pumping 2,400 ****gpm****?**

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14.
**How many pounds of 65% HTH would be needed to dose 300,000 gal. at 250 mg/L?**

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15.
**How many pounds of 65% HTH would be needed to dose 3,500 ****ft**** of 12 inch pipe to 50 mg/L?**

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16.
**What would be the cost per day to chlorinate 4 MG at 1.5 mg/L if chlorine cost 20 cents per pound?**

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17.
**A leak of 1 pint every 1.5 min. would leak how many gallons in 30 days?**

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18.
**What is the pumping rate in ****gpm**** if the pump drains 2'**** out of a 25'**** x 35'**** basin in 1 hr.?**

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