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

Gallons per minute (GPM)

Answer

Cubic feet per minute (CFM)

Answer

Feet per second (FPS)

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

The speed at which the pump motor rotates

Answer

The frequency of backwashing the filter

Answer

The rate at which water evaporates from the pool surface

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

The water level measured from the pool bottom to the surface

Answer

The maximum pressure at the pump discharge port

Answer

The height difference between the pump and the water surface

Question 4

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

Accepted Answer

Gallons per minute

Answer

Gauge pressure measurement

Answer

General pump metric

Answer

Gravitational pressure magnitude

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

Pascal's Law

Answer

Boyle's Law

Answer

Archimedes' Principle

Question 6

What is the primary purpose of a check valve in a pool plumbing system?

Accepted Answer

To prevent backflow or reverse flow of water

Answer

To regulate water pressure to a fixed set point

Answer

To control water temperature in the return line

Answer

To measure the flow rate through the pipe

Question 7

What maximum flow velocity is typically recommended in pool suction piping to prevent cavitation and excessive friction losses?

Accepted Answer

6 feet per second

Answer

2 feet per second

Answer

12 feet per second

Answer

20 feet per second