More Water Math Problems & Charts

What is the Langlier Index if the pH_A is 9.2 and the pH_S is 8.6?  Is this stable, depositing or corrosive?

If the P alkalinity is 0 mg/L and the T alkalinity is 100 mg/L, calculate the following:

• Bicarbonate alkalinity
• Carbonate alkalinity
• Hydroxide alkalinity

If the P alkalinity is 35 mg/L and the T alkalinity is 60 mg/L, calculate the following:

• Bicarbonate alkalinity
• Carbonate alkalinity
• Hydroxide alkalinity

120 mg/L of Ca as Ca is equivalent to ______ mg/L of Ca as CaCO₃

If you are removing 300 mg/L of hardness and your flow is 2 mgd, how many pounds of hardness are you removing?

You are adding 6 lbs/day of chlorine gas to a flow of 277 gpm and your total chlorine residual is 1.5 mg/L. What is your chlorine demand in mg/L?

Click on the thumbnail below for a chart of pump station math for cylindrical tanks and have some fun!!!

Click on the thumbnail below for a chart of pump station math for rectangular tanks and have some fun!!!

Click on the thumbnail below for a chart of pipe math and have some fun!!!

Match
1	The units for pressure are	A	Divided by
2	Head is expressed in	B	2.31
3	Velocity is measured in	C	0.434 psi
4	Units of flow	D	psi
5	Pressure times _______ = Head	E	fps
6	Head __________ 2.31 = Pressure	F	1440
7	20 psi =	G	694 gpm
8	1 MGD =	H	cfs
9	A head loss of 7 feet =	I	3 psi
		J	Times
		K	ft
		L	46.2 ft
		M	Subtracted by

The formula for the volume of a rectangular tank is

A.  (Length)(Width)

B.  (0.785)(Diameter²)

C.  (Length)(Width)(Height)

D.  (0.785)(Diameter²)(Height)

The formula for the volume of a cylindrical tank is

A.  (Length)(Width)

B.  (0.785)(Diameter²)

C.  (Length)(Width)(Height)

D.  (0.785)(Diameter²)(Height)

Given a tank measures 50 feet long, 25 feet wide, and 15 ft deep, calculate:

• Surface area in ft²
• Cross-sectional area in square feet
• Volume in cf
• Capacity in gallons