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Water Well Service Technician

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Real-Life Math -- Solution

You are a water well service technician selecting the casings for two different pumps. This is what you calculate:

Question A.

For the Mabels' line shaft turbine, you select a casing with a circumference of 20 inches. The diameter of the casing for a line shaft turbine pump must be at least 6 inches. Will this casing be big enough?

C = Pi x D

Circumference = 20 inches

Diameter = D
Pi = 3.14

20 inches = 3.14 x D
D = 20 inches / 3.14
D = 6.37 inches

This casing is bigger than 6 inches in diameter, so it can be used.

Question B.

For the Fox's submersible pump, you select a casing that has a circumference of 11 inches. The diameter for this casing must be at least 4 inches. Will this casing be the right size?

Circumference = 11 inches
Diameter = D

11 inches = 3.14 x D
D = 11 inches / 3.14
D = 3.5 inches

The diameter must be at least 4 inches. This casing is not big enough.

Basic, and often creative, math is a required skill in this industry. Bob Lium, project manager of a water well contracting company, says that a water well technician uses math daily. "Every single day. There are many questions. How deep are we? How much water are we getting out of this hole? All of our guys are proficient in math."


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