CAT Hydraulics and Plumbing Systems

Question 1

What is the standard unit of measurement for water pressure in pool hydraulic systems?

Accepted Answer

Pounds per square inch (PSI)

Answer

PSI (pounds per square inch) is the standard unit used to measure water pressure in pool hydraulic systems.

Question 2

What does 'turnover rate' refer to in aquatic facility hydraulics?

Accepted Answer

The time required to circulate the entire pool volume through the filtration system once

Answer

Turnover rate is the time required to circulate the entire volume of pool water through the filtration system at least once.

Question 3

In pool hydraulics, 'total dynamic head' (TDH) refers to which of the following?

Accepted Answer

The total resistance to water flow that the pump must overcome

Answer

Total dynamic head (TDH) is the total resistance to flow—including friction losses, elevation changes, and equipment resistance—that the pump must overcome.

Question 4

What does GPM stand for in the context of aquatic facility hydraulics?

Accepted Answer

Gallons per minute

Answer

GPM stands for gallons per minute, the standard unit for measuring water flow rate in pool and spa circulation systems.

Question 5

Which physical principle explains why water velocity increases as pipe diameter decreases while flow rate remains constant?

Accepted Answer

The Continuity Equation

Answer

The Continuity Equation states that cross-sectional area multiplied by velocity must remain constant, so as pipe diameter decreases, velocity must increase to maintain the same volumetric flow rate.

(CAT) Certified Aquatic Technicians Practice Test

(CAT) Certified Aquatic Technicians Practice Test

CAT Hydraulics and Plumbing Systems