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?
1.2 hours
2.4 hours
4.1 hours
4.9 hours
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?
30.4 feet below ground surface
109.5 feet below ground surface
46.1 feet below ground surface
170 feet below ground surface
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?
20 feet
16 feet
4 feet
10 feet
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?
16.5 lbs.
4.4 lbs.
7.3 lbs.
27.4 lbs.
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
10 minutes
20 minutes
30 minutes
40 minutes
What is the flow rate through a 16-inch diameter pipeline if the water's velocity is 2.5 ft/s?
900 gpm
1002 gpm
1566 gpm
1940 gpm
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.
10 gallons
7 gallons
8 gallons
3 gallons
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.
14.1 lbs.
2.1 lbs.
9.7 lbs.
8.4 lbs.
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.
2.5 lbs.
7.1 lbs.
8.9 lbs.
9.4 lbs.
What is the well yield if it takes 55 minutes to fill a 4044 cubic foot tank from a well?
210 gpm
125 gpm
550 gpm
1045 gpm
What is the required storage volume for a reservoir if a well pumps 600 gpm of water into the reservoir for 24 hours?
29,080 cubic feet
320,440 cubic feet
45,220 cubic feet
115,508 cubic feet
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?
102.4 gallons/day
427.4 gallons/day
982.1 gallons/day
72.7 gallons/day
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?
2.1 feet
3.2 feet
8.8 feet
19.2 feet
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?
20.9 feet
9.1 feet
8.4 feet
4.7 feet
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?
7 days
5 days
4 days
2 days
