Operation and Maintenance Flashcards
7 cards from real CPO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Operation and Maintenance flashcards as text
When vacuuming a pool 'to waste,' where does the vacuumed water go?
Answer: Directly to the drain, bypassing the filter entirely
Vacuuming to waste sends water to the drain without passing through the filter, which is preferred when removing algae or fine material that would overwhelm the filter.
What is the primary safety purpose of a Virginia Graeme Baker (VGB)-compliant main drain cover?
Answer: To prevent swimmer entrapment and evisceration injuries caused by drain suction
VGB-compliant drain covers are engineered to prevent hair, limb, and body entrapment at suction outlets, which can cause drowning or severe injury.
What is the typical recommended water temperature range for a competitive lap swimming pool?
Answer: 77–82°F (25–28°C)
Competitive pools are maintained at 77–82°F to balance swimmer comfort with athletic performance — water that is too warm increases fatigue.
A pool pump frequently loses prime during operation. What should the operator check FIRST?
Answer: Suction-side pipe fittings and the pump lid O-ring for air leaks
Loss of prime is almost always caused by air entering on the suction side — inspect the pump lid O-ring, suction fittings, and valves for any air infiltration.
What is the correct procedure when adding muriatic acid to a pool to lower pH?
Answer: Dilute the acid in a bucket of pool water first, then add slowly near a return jet with the pump running
Acid must always be diluted in water (never water into acid) and added with the pump circulating to prevent concentrated acid from damaging pool surfaces or equipment.
How must pool chemical storage areas be configured to meet safety requirements?
Answer: Oxidizers and reducing agents must be stored in separate, ventilated, cool, and dry areas
Mixing oxidizers (e.g., chlorine) with reducing agents or fuels can cause violent reactions — they must be kept in separate, properly ventilated storage areas.
For how long must pool water chemistry treatment records typically be retained according to most health codes?
Answer: A minimum of 1–2 years (exact duration varies by jurisdiction)
Most health codes require chemical testing and treatment records to be kept for at least one to two years and made available to health inspectors on request.