CPO Operation and Maintenance 2

Question 1

A sand filter's pressure gauge reads 10 PSI above its clean starting pressure. What does this indicate and what action is required?

Accepted Answer

Backwash the filter to remove accumulated debris

Answer

Continue normal operation; pressure fluctuations are normal

Answer

Replace the filter sand immediately

Answer

Reduce pump speed to lower the pressure

Question 2

What is the maximum turnover rate most health codes require for a standard public swimming pool?

Accepted Answer

Every 6 hours

Answer

Every 2 hours

Answer

Every 4 hours

Answer

Every 8 hours

Question 3

Which filter type provides the finest particle filtration, capable of removing particles as small as 2–5 microns?

Accepted Answer

Diatomaceous earth (DE) filter

Answer

High-rate sand filter

Answer

Cartridge filter

Answer

Anthracite multi-media filter

Question 4

What is the primary purpose of the pump strainer basket in a pool circulation system?

Accepted Answer

To catch hair, leaves, and debris before they reach the pump impeller

Answer

To regulate chemical dosing in the return line

Answer

To monitor the flow rate through the system

Answer

To filter fine particles from the water

Question 5

During backwashing of a sand filter, in which direction does water flow through the filter bed?

Accepted Answer

Upward through the filter bed to lift and agitate the sand

Answer

Downward at increased speed, same as normal filtration

Answer

Sideways through bypass ports installed in the filter tank

Answer

Outward radially from a central distribution pipe

Question 6

What type of valve is installed on the suction line of a pool pump to prevent water from draining back when the pump shuts off?

Accepted Answer

Check valve

Answer

Gate valve

Answer

Ball valve

Answer

Butterfly valve

Question 7

What does 'static head' refer to in a pool hydraulic system?

Accepted Answer

The pressure created by the weight of standing water at rest

Answer

The flow rate through the return pipes at maximum pump speed

Answer

The difference in elevation between the pump and the pool surface

Answer

The resistance added by filter media to the water flow