CPO Chemical Handling and Storage 4

Question 1

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

Accepted Answer

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

Answer

1–2 ppm above the current free chlorine reading

Answer

3–5 ppm regardless of combined chlorine present

Answer

Exactly 20 ppm for all pool types and sizes

Question 2

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

Accepted Answer

Another pool chemical such as trichlor or acid

Answer

Clean municipal tap water

Answer

Plain water in a clean white HDPE bucket

Answer

Water from the pool being treated

Question 3

Chlorine gas cylinders must be stored in which position?

Accepted Answer

Upright and secured with a restraint chain or strap

Answer

Horizontally on a padded rack to prevent rolling

Answer

Inverted (upside-down) so the dip tube stays submerged in liquid

Answer

Stacked on their sides in pairs with rubber spacers between them

Question 4

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

Accepted Answer

Evacuate everyone from the area and call emergency services

Answer

Try to close the cylinder valve immediately while holding one's breath

Answer

Open doors and windows and ventilate the space before investigating

Answer

Put on a dust mask and enter to locate the source of the leak

Question 5

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

Accepted Answer

1 gallon

Answer

1 quart (32 fluid ounces)

Answer

2.5 gallons

Answer

5 gallons

Question 6

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

Accepted Answer

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

Answer

Cal hypo dust clogs sand filter laterals and damages equipment

Answer

The dust settles and raises pool pH beyond the recommended range

Answer

Dust exposure only causes minor temporary skin discoloration

Question 7

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

Accepted Answer

Safety Data Sheets in a standardized 16-section GHS format

Answer

Monthly chemical hazard reports submitted directly to OSHA

Answer

Quarterly PPE recommendation updates for all hazardous products

Answer

Annual chemical use logs for each facility purchasing their products