CPO Operation and Maintenance Questions and Answers 2 — Questions and Answers
Question 1: What daily operational checks should a CPO perform before opening a public pool?
- Only check water temperature
- Test water chemistry, inspect safety equipment, verify drain covers, and check circulation system (Correct answer)
- Just turn on the pumps
- Only check the chlorine level
Correct answer: Test water chemistry, inspect safety equipment, verify drain covers, and check circulation system
Pre-opening checks include testing water chemistry, inspecting safety equipment, verifying drain cover integrity, confirming circulation system operation, and visual inspection of the facility.
The checklist covers water chemistry (chlorine, pH, temperature), water clarity (main drain visible), circulation system, safety equipment (ring buoy, reaching pole, first aid kit, spine board, AED), drain covers, deck inspection, chemical feeder operation, signage, and communications. Document all checks on a daily log sheet.
Question 2: How often should pool filter sand be replaced in a commercial pool?
- Every 6 months
- Every 3 to 5 years or when backwashing no longer restores normal pressure (Correct answer)
- Annually
- Sand never needs replacement
Correct answer: Every 3 to 5 years or when backwashing no longer restores normal pressure
Sand filter media typically lasts 3 to 5 years. Replace when backwashing fails to restore clean starting pressure or when water clarity persistently decreases.
Degradation occurs through grain rounding, oil coating, calcification, and mudballing. Signs for replacement include higher clean starting pressure, backwashing no longer improving clarity, and pressure rising quickly after backwash. During replacement, inspect the laterals for damage.
Question 3: What is the proper procedure for cleaning a cartridge filter element?
- Blast it with a high-pressure washer
- Turn off the pump, release pressure, remove cartridge, rinse with a garden hose between each pleat (Correct answer)
- Simply shake off debris and reinstall
- Soak in muriatic acid for 24 hours
Correct answer: Turn off the pump, release pressure, remove cartridge, rinse with a garden hose between each pleat
Shut down the system, release pressure, remove the element, and rinse between pleats with a garden hose. High-pressure washing damages the filter fabric.
Rinse with a garden hose at 40 to 60 psi working from top to bottom between each pleat. For deep cleaning, soak overnight in cartridge cleaning solution. Never use a pressure washer as it damages the fabric and embeds debris deeper. Maintain a rotation of cartridges.
Question 4: What preventive maintenance should be performed on a pool heater annually?
- No maintenance required if working
- Inspect heat exchanger for scale, clean burner assembly, check gas connections, and verify safety controls (Correct answer)
- Only check the thermostat
- Replace the entire heater annually
Correct answer: Inspect heat exchanger for scale, clean burner assembly, check gas connections, and verify safety controls
Annual maintenance includes heat exchanger inspection and descaling, burner cleaning, gas connection leak testing, safety control verification, and ignition system testing.
Check the heat exchanger for scale and corrosion, clean burners and check flame pattern, test gas fittings for leaks, inspect exhaust flue, test high-limit switch and other safety controls, verify reliable ignition, and check electrical connections. Document all maintenance.
Question 5: What is the recommended practice for managing a pool during a thunderstorm?
- Continue if lightning is more than 5 miles away
- Clear the pool and deck when thunder is heard, wait 30 minutes after the last thunder or lightning (Correct answer)
- Only close if lightning strikes within 1 mile
- Thunderstorms do not affect pool safety
Correct answer: Clear the pool and deck when thunder is heard, wait 30 minutes after the last thunder or lightning
Clear the pool and surrounding deck area when thunder is heard or lightning is observed. Wait a minimum of 30 minutes after the last occurrence before reopening.
All patrons must exit the pool, deck, and open areas and move to enclosed buildings. Staff must also evacuate. Lightning can strike from a departing storm that appears to be moving away, which is why the 30-minute wait after the last occurrence is critical.
Question 6: What is the proper procedure for acid washing a plaster pool?
- Fill the pool with acid and let it sit
- Drain the pool, apply diluted muriatic acid solution in sections, scrub, rinse, and neutralize (Correct answer)
- Pour acid into a full pool and circulate
- Acid washing is never recommended
Correct answer: Drain the pool, apply diluted muriatic acid solution in sections, scrub, rinse, and neutralize
Acid washing involves draining the pool, pre-wetting sections, applying diluted acid, scrubbing, rinsing, and neutralizing the runoff before proper disposal.
Full PPE is required including respirator and acid-resistant gloves. Work in manageable sections from top to bottom. Allow acid to fizz for 30 to 60 seconds. Rinse thoroughly. Neutralize collected water with soda ash before disposal. Refill immediately to prevent cracking. Acid washing removes a thin layer of plaster so limit to every 5 to 7 years.
CPO Operation and Maintenance Questions and Answers 2
What daily operational checks should a CPO perform before opening a public pool?