Pool & Spa Maintenance & Operations Flashcards

What is the purpose of a Safety Vacuum Release System (SVRS) in a pool?

Answer: To detect suction entrapment and shut off the pump

An SVRS automatically detects abnormal suction conditions (indicating a body or object is blocking a drain) and shuts off the pump to prevent entrapment.

When using a diatomaceous earth (DE) filter, what must be done after each backwash?

Answer: Add a fresh charge of DE powder through the skimmer

After backwashing a DE filter, a fresh charge of DE powder must be added through the skimmer to re-coat the filter grids with the filtering media.

What is the recommended pH range for pool and spa water?

Answer: 7.2–7.8

The recommended pH range is 7.2–7.8, with 7.4–7.6 being ideal for bather comfort and optimal chlorine effectiveness.

A pool has a strong chlorine smell that is causing eye irritation to swimmers. What does this most likely indicate?

Answer: Too little free chlorine and high combined chlorine (chloramines)

A strong chemical smell and eye irritation are caused by chloramines (combined chlorine), not free chlorine — the solution is to shock the pool, not reduce chlorine.

Which chemical is used to raise calcium hardness in pool water?

Answer: Calcium chloride

Calcium chloride is the standard chemical added to pool water specifically to increase calcium hardness levels.

What minimum safety equipment must be immediately accessible at a public swimming pool?

Answer: A shepherd's crook, ring buoy with rope, and a phone or intercom

Standard public pool safety equipment requirements include a reaching pole (shepherd's crook), a throwing device (ring buoy with rope), and an emergency communication device.

How should dry chemicals be added to a pool to prevent hazardous reactions?

Answer: Pre-dissolve separately in water and add to the pool with the pump running

Chemicals should be pre-dissolved separately in a bucket of water (never mixed together) and added to the pool while the pump is running to ensure proper dilution and distribution.