pool operators

chloramines are

a combination of chlorine and ammonia in pool water

an aid in removing small particles from the pool water is

a flocculent

cyan uric acid is commonly called

a stabilizer

as dirt in the filter _____ the flow of water going through the filter _____ while filter pressure ____

accumulates, decreases increases

components and materials used for commercial swimming pools spas and hot tubs must comply with what standard

ansi/nspa standard 5

the term for removing dirt particles from the filter is

backwashing

if you see bubbles coming up from a return the possible cause could be

bad seal on hair and linkt strainer

which type of algae inmost difficult to control in a pool, often requiring chlorination and brushing to eliminate

black algae

the chemical name for dry chlorine is

calcium hypochlorite

if the pool is cloudy and you can't see the main drain

close the pool to swimmers

stains on the interior pool surfaces are usually caused by

copper manganese iron

low calcium hardness in the pool water will cause

corrosion of the pool fixtures

what kind of filter media filters out the smallest particles

de

as dirt accumulates inside a filter the amount of water that can pass through the filter

decreases

sodium hypochlorite

deteriorates quickly into exposed air, quickly in sunlight and quickly in high temperature

how do you lower calcium hardness

drain out and add fresh water

pool water must be tested once

every 24 hours

on a pool without a diving bowl no diving tiles must be placed

every 25 feet around the pool

in most jurisdictions the turnover time for a swimming pool is

every 6 hours

cloudy water may be caused by

filter malfunction, excessive bather load, chemical imbalance of pool water

a pool should be free from

floating debris, sediment and dirt, algae

resistance in a pool circulation system is caused by what and whay

friction and head loss

chlorine can be used in which of the following forms

gas liquid powder

chlorine in its natural state is

green

chlorine gas is

heavier than air

microorganisms can be shielded from disinfectants if they are in suspended particles. this situation is caused by

high turbidity levels

chlorine reacts with water to form what disinfectant

hypochlorous acid

chlorine becomes avaialbe to kill bacteria

immediately when added to water

the volume of water going through filter system is measured

in gallon per minute

bromine is sometimes used as a disinfectant because

it is more stable at a higher temperature than chlorine

to lower the ph add

muriatic acid

the hypochlirnator doesn't work what could be a possible cause for this

no chlorine in vat, the injection fitting is clogged and the tube assembly needs to be changed

channeling means

over the course of time the filter and sand is bad and deep channels are formed in the sand causing it to filter poorly

chlorine is used in pool water to not only kill germs but to

oxidize organic matter

what should you use when handling chemicals

personal protective equipment- gloves, goggles apron

when doing the ph test and the sample turns purple

ph is too high

when doing a ph test and the sample turns yellow

ph is too low

handrails should be anchored into the

pool deck and bottom step

algae forms because of

poor circulation

the skimmer weir

precents floating material from re entering the pool

a sequestering agent in a pool may be used to

prevent precipitation of minerals on pool surfaces

what should you have if wage rid deeper than 5 feet

put up a safety line and have a slop line mark

Main drain purpose

remove sediments and is located at the deep end of the pool

high calcium hardness causes

scaling

There are complaints of red eyes in the swimmer nd chlorine odors are present. the alkalinity is 100ppm, the harness is 240ppm, the ph is 7.4 and the chine level is 1.0 what should the pool operator do

shock the pool with chlorine

to clean a cartridge filter

soaked in degreaser and hosed off

to raise ph what may be adde to the pool

soda ash

to raise the alkalinity level in swimming pool water what chemical is added

sodium bicarbonate

the chemical name for liquid chlorine is

sodium hypochlorite

to becoming a certified pool operator a person must

successfully complete training course in pool operations approved by local jurisdictions

which of the following conditions attribute to accelerated growth of algae in a pool

sunlight hot weather and high bather load

a filter backwash cycle for sand filter is complete when

the backwash water appears clear in sight class

the strongest suction in the pool is

the main drain and the pool must have GFI's

to remove stains from the interior surface of a pool

the pool must be drained and acid washed

filtration is

the process of removing suspend particles form the water

the amount of time that it takes for the total volume of pool water to pass through the circulation system is called

turnover rate

flow rate

turnover rate/ filter media rate

adding liquid or dry chlorine to the pool water has the following effects on ph

will raise the ph

the recommend level of free chlorine in the swimming pool water is

1-5ppm

ideal bromine level in a pool is

1.5 to 6

the pressure differential pressure between gauges on a pressure filter shouldn't exceed

10 psi

to have breakpoint level chlorine at a pool you must have

10 times the level of chloramines

cyanuric acid level cannot exceed

100 ppm

maximum temperature for a spa is

104 f

accodoring to statistics from cdc how many water-related injuries are annually associated with swimming activities

140000

high rate sand filters are abler o filter how much water per minute per square foot

15-25

if a pool has a volume of 75000 gallons and the turnover rate is 8 hours the minimum required flow rate is

156.25 gallons per minute

a shepherds hook must be attached to a

16 foot one piece pole

the volume of water in a rectangular pool is 15 feet wide, 50 feet long and has a constant depth of 3 feet is

16, 830 gallons

minimum number of ladders

2

hardness is a measure of certain dissolved minerals in the water and is recommend to be maintained at

200-400 ppm

the surface areas of the regular swimming pool 30 feet wide and 75 feet long is

2250 square feet

ideal bromine level in a spa

3-10

you go to the pool in the mooring and notice the chlorine vat is at zero, you hand feed chlorine how long do you have to wait until people to go into the pool

30 minutes

the surface area of a circular wading pool with a diameter of 20 feet is

314 square feet

minimum of ___ of deck around pool perimeter

4

barriers around a pool must be

42 inches in height

the recommend range to maintain ph is

7.2-7.8

alkalinity of swimming pool water is recommended to be maintained at

80-140 ppm