Practice Test GeeksCPO (Certified Pool Operator Exam) Practice Test
← All CPO Flashcard Decks

Chemical Handling and Storage 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 Chemical Handling and Storage flashcards as text

  1. Superchlorination (breakpoint chlorination) requires free chlorine to reach what target level?

    Answer: 10 times the combined chlorine (chloramine) level in the water

    Breakpoint chlorination requires free chlorine equal to 10 times the combined chlorine level to fully oxidize chloramines and restore water quality.

  2. Calcium hypochlorite granules should NEVER be pre-dissolved in a container that previously held:

    Answer: Another pool chemical such as trichlor or acid

    Residue from prior chemicals—especially other chlorine types or acid—can react violently with cal hypo, causing ignition, fire, or explosion.

  3. Chlorine gas cylinders must be stored in which position?

    Answer: Upright and secured with a restraint chain or strap

    Gas cylinders must be kept upright and restrained because a falling cylinder can shear the valve, causing a catastrophic, uncontrolled gas release.

  4. If chlorine gas is detected leaking in an equipment room, the operator's FIRST action should be to:

    Answer: Evacuate everyone from the area and call emergency services

    Chlorine gas is immediately dangerous to life and health (IDLH) at 10 ppm; immediate evacuation and calling 911 is the only safe response without SCBA equipment.

  5. Approximately how much 10% sodium hypochlorite (liquid chlorine) is needed to raise free chlorine by 1 ppm in a 100,000-gallon pool?

    Answer: 1 gallon

    The standard rule of thumb is approximately 1 gallon of 10% sodium hypochlorite per 100,000 gallons of water to raise free chlorine by 1 ppm.

  6. When handling dry calcium hypochlorite, a CPO must avoid creating airborne dust because:

    Answer: Inhaled dust is a severe respiratory irritant and oxidizer dust can ignite

    Cal hypo is a strong oxidizer; its dust can ignite at sufficient concentrations and causes serious respiratory tract irritation requiring appropriate respiratory PPE.

  7. Under OSHA's HazCom 2012 (GHS-aligned) standard, chemical manufacturers must provide:

    Answer: Safety Data Sheets in a standardized 16-section GHS format

    HazCom 2012 requires all hazardous chemicals to be accompanied by a 16-section SDS covering hazard identification, first aid, handling, storage, and disposal.