WTO Math 2

Question 1

A storage tank is 30 feet in diameter and 20 feet tall. What is its volume in gallons? (1 ft³ = 7.48 gal)

Accepted Answer

105,640 gal

Answer

105,760 gal

Answer

105,490 gal

Answer

106,100 gal

Question 2

A pump delivers 500 gpm. How many hours will it take to fill a 750,000-gallon reservoir?

Accepted Answer

25 hours

Answer

30 hours

Answer

20 hours

Answer

35 hours

Question 3

A water main is 12 inches in diameter and 1,000 feet long. What volume of water does it hold in gallons?

Accepted Answer

5,875 gal

Answer

4,710 gal

Answer

7,065 gal

Answer

3,925 gal

Question 4

A treatment plant adds 4.5 mg/L of chlorine to a flow of 2.8 MGD. How many pounds of chlorine are used per day?

Accepted Answer

105.3 lb/day

Answer

98.6 lb/day

Answer

112.4 lb/day

Answer

88.2 lb/day

Question 5

Convert 2.5 cubic feet per second (cfs) to gallons per minute (gpm).

Accepted Answer

1,122 gpm

Answer

935 gpm

Answer

1,350 gpm

Answer

875 gpm

Question 6

A backwash pump operates at 3,200 gpm for 8 minutes. How many gallons are used per backwash cycle?

Accepted Answer

25,600 gal

Answer

19,200 gal

Answer

28,800 gal

Answer

22,400 gal

Question 7

A chemical feeder applies 12 oz of chemical per day. How many pounds per week is this?

Accepted Answer

5.25 lb/week

Answer

4.75 lb/week

Answer

6.00 lb/week

Answer

3.50 lb/week