California Landscape Architecture Practice Exam

To determine the pressure exerted by a water tower, you can use the formula that relates the height of the water column to pressure in pounds per square inch (PSI). The general rule is that for every foot of water height, there is approximately 0.433 PSI of pressure.

In this case, if the water tower is 200 feet tall, you multiply the height by the conversion factor:

200 feet * 0.433 PSI/foot = 86.6 PSI.

This is how you derive the pressure at the bottom of the water tower. Thus, the corresponding pressure for a 200-foot water tower is indeed 86.6 PSI. The calculation confirms that this answer accurately reflects the principles of fluid pressure in a standing column of water.