Joe Jorgensen
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Distribution practice for water math

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Joe Jorgensen
Created by Joe Jorgensen about 5 years ago
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Distribution Math Practice 3

Question 1 of 15

1

How long will it take to fill an empty 16-inch diameter pipe that is 1.8 miles long, if it is filled at a rate of 700 gpm?

Select one of the following:

  • 1.2 hours

  • 2.4 hours

  • 4.1 hours

  • 4.9 hours

Explanation

Question 2 of 15

1

A 150-foot long air line is placed in a well. If air is pumped into the air line, and the pressure stabilizes at 45 psi. what is the static water level in the well?

Select one of the following:

  • 30.4 feet below ground surface

  • 109.5 feet below ground surface

  • 46.1 feet below ground surface

  • 170 feet below ground surface

Explanation

Question 3 of 15

1

If there are 180,000 gallons of water in a rectangular reservoir that is 60 feet long, 40 feet wide, and 25 feet deep, what is the water level in the reservoir?

Select one of the following:

  • 20 feet

  • 16 feet

  • 4 feet

  • 10 feet

Explanation

Question 4 of 15

1

How many pounds of chlorine gas is needed in 24 hours if the chlorine dose is 2.5 mg/L and the flow rate of water is 550 gpm?

Select one of the following:

  • 16.5 lbs.

  • 4.4 lbs.

  • 7.3 lbs.

  • 27.4 lbs.

Explanation

Question 5 of 15

1

How long will it take to drain the entire volume of an 8-inch diameter pipeline that is 3000 feet long, if the water velocity is 2.5 ft/s

Select one of the following:

  • 10 minutes

  • 20 minutes

  • 30 minutes

  • 40 minutes

Explanation

Question 6 of 15

1

What is the flow rate through a 16-inch diameter pipeline if the water's velocity is 2.5 ft/s?

Select one of the following:

  • 900 gpm

  • 1002 gpm

  • 1566 gpm

  • 1940 gpm

Explanation

Question 7 of 15

1

How many gallons of 12.5% sodium hypochlorite solution is required to disinfect 30,000 cubic feet of water with a chlorine dose of 2 mg/L? The specific weight of 12.5% sodium hypochlorite solution is 10 lbs/gallon.

Select one of the following:

  • 10 gallons

  • 7 gallons

  • 8 gallons

  • 3 gallons

Explanation

Question 8 of 15

1

How many pounds of 65% HTH is required to disinfect a 25-foot diameter tank that is 15 feet high, with a chlorine dose of 3 mg/L? Assume the tank is completely filled with water.

Select one of the following:

  • 14.1 lbs.

  • 2.1 lbs.

  • 9.7 lbs.

  • 8.4 lbs.

Explanation

Question 9 of 15

1

How many pounds of 65% calcium hypochlorite is required to chlorinate a new 8 inch diameter water main that is 3000 feet long? THe chlorine dose is 25 mg/L.

Select one of the following:

  • 2.5 lbs.

  • 7.1 lbs.

  • 8.9 lbs.

  • 9.4 lbs.

Explanation

Question 10 of 15

1

What is the well yield if it takes 55 minutes to fill a 4044 cubic foot tank from a well?

Select one of the following:

  • 210 gpm

  • 125 gpm

  • 550 gpm

  • 1045 gpm

Explanation

Question 11 of 15

1

What is the required storage volume for a reservoir if a well pumps 600 gpm of water into the reservoir for 24 hours?

Select one of the following:

  • 29,080 cubic feet

  • 320,440 cubic feet

  • 45,220 cubic feet

  • 115,508 cubic feet

Explanation

Question 12 of 15

1

What is the average daily water usage if the water meter reads 2,788 CCF today and exactly one week later, it reads 2,792 CCF?

Select one of the following:

  • 102.4 gallons/day

  • 427.4 gallons/day

  • 982.1 gallons/day

  • 72.7 gallons/day

Explanation

Question 13 of 15

1

What is the water level in a 30 foot diameter tank that is 20 feet high, if the water pressure is 3.8 psi at the bottom of the tank?

Select one of the following:

  • 2.1 feet

  • 3.2 feet

  • 8.8 feet

  • 19.2 feet

Explanation

Question 14 of 15

1

What is the water level in a tank that is located 150 feet above a pump station, if the water pressure on the discharge side of the pump is 74 psi?

Select one of the following:

  • 20.9 feet

  • 9.1 feet

  • 8.4 feet

  • 4.7 feet

Explanation

Question 15 of 15

1

How many days will it take to use 68,288 gallons of water from a tank, if the service area it serves has 388 people, and each person uses 88 gallons/day?

Select one of the following:

  • 7 days

  • 5 days

  • 4 days

  • 2 days

Explanation

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