Pools

Question 1

improper use of chems may cause

Answer 1

living organism in water, removal of protective coatings, irritation of skin

Question 2

swimmers have a higher over all illness rate than non swimmers

Answer 2

regardless of nothing water quality

Question 3

swimming pools need

Answer 3

recalculation, filtrations, proper operations

Question 4

.5 NTU

Answer 4

shall not be exceeded

Question 5

pool filtration system should filter entire volume of water every

Answer 5

6-8 hours

Question 6

rate of filtration for diatomite filter shoudl be

Answer 6

1- 2 gpm

Question 7

chems used for pools include chlorine, chlorisocynaurates, bromine and

Answer 7

iodine

Question 8

gutters or skimmers receive a minimum of _ total pool water

Answer 8

60%

Question 9

most effective method for pools maintenance is

Answer 9

continuous recirculation, chlorination, filtration

Question 10

eye irritation can occur when ph is

Answer 10

below 7.4 or or 7.0

Question 11

advantage of cynauric acid additive is

Answer 11

stabilized residual chlorine

Question 12

acidity/alkilinity balances affects eye irritation water coagulation and

Answer 12

effectiveness of chlorine

Question 13

addition of sodium bicarbonate

Answer 13

raises alkalinity

Question 14

to raise PH

Answer 14

soda ash

Question 15

acid to to water

Answer 15

add acid to water

Question 16

chem to improve water clarity

Answer 16

alum

Question 17

control of swimmers itch

Answer 17

add copper sulfate

Question 18

preferred method for controlling sewage

Answer 18

on board holding tanks

Question 19

swimmers itch is know as

Answer 19

schistosomiasis

Question 20

increase in dissolved solids due to evaporation ink whirlpools hot tubs in indicated by

Answer 20

cloudy water

Question 21

skin infections in hot tubs

Answer 21

pseudomonas aer

Question 22

water in wading pools should be completely recirculated every

Answer 22

60 minutes

Question 23

free chlorine residual at

Answer 23

1.0- 3.0 mg.liter

Question 24

ph for pools

Answer 24

7/2 - 7-6

Question 25

swimming pool shave had many diseases including

Answer 25

leptrospirosis

Question 26

prohibited swimming pool is a

Answer 26

fill and draw pool

Question 27

its essential that pools

Answer 27

run their recirculation and disinfections equipment 24 hours a day

Question 28

bottom slops not greater than

Answer 28

1in per 12 inches

Question 29

pools less than 30 ft wide and surface of less than 1600 fr

Answer 29

may utilize gutters rather than skimmers

Question 30

pools must be designed to

Answer 30

fit expected number of swimmers

Question 31

approved swimming pols must

Answer 31

have a, pump to recirculate every 6 hours, filter designed for output of the pump and disinfection capable of 10mg/ ltr

Question 32

fresh water supply pool must

Answer 32

fill pool with air gap

Question 33

connection of pool drain to sewer system must

Answer 33

have a properly located cleanout

Question 34

recognize a well designed pool is

Answer 34

crystal clear water, 1/mg 1 chlorine and ph of 7.4

Question 35

when closing is added to water

Answer 35

to acids are formed

Question 36

molecular state of hydrochlorous acid is desired from chlorine the product is

Answer 36

62 percent molecular at 7.2ph

Question 37

a ph for optimal minimized eye irritation

Answer 37

7.5 to 7.6

Question 38

gas chlorine is

Answer 38

100 percent chlorine

Question 39

migrant farm workers found that migrants who did not have access to water had a rate of dihrhea

Answer 39

20 times higher

Question 40

preparations for mass agterhinls include

Answer 40

plan, refuse storage, noise control

Question 41

not likely to be contracted at a beach

Answer 41

spinal meningitis

Question 42

Public health factor primary important in determining sanitary of rec water

Answer 42

chlorofrom

Question 43

Naegleria fowler is linked to

Answer 43

primary amoebic meningeoncehphilitis

Question 44

organism that would survive in a hot tub

Answer 44

pseudomanas aero

Question 45

secchi disk is used to

Answer 45

clarity of water

Question 46

chem used for pool aklinity

Answer 46

sodium bicarbonate

Question 47

ph for least eye ittitation

Answer 47

7.6

Question 48

reason a pool should stay below 8

Answer 48

decreases amount of active chlorine

Question 49

bromine residual with DPD test

Answer 49

multiply chlorine by 2.25

Question 50

pool quality tests

Answer 50

PH and Chlorine residual

Question 51

what raises pH

Answer 51

sodium carbonate

Question 52

compounds thats a principal scale former

Answer 52

calcium carbonate

Question 53

algae control

Answer 53

super chloroniation

Question 54

best method to eliminate swimmers itch

Answer 54

break chain of schistosome

Question 55

methods of rec waters may be contaminated

Answer 55

infected people, surface runoff, water flora

Question 56

pols that are brown

Answer 56

MN

Question 57

reduce drying accidents

Answer 57

develop training

Question 58

muaritic acid is weak solution of

Answer 58

hydrochloric acid

Question 59

situation where to find PAM

Answer 59

geothermal pool

Question 60

Pool Flow diagram

Answer 60

skimmer or gutter, main drain, valves, hair, filter, disinfected needed, ph feeder, inlets

Question 61

main drain should have valve of _ times the area of discharge

Answer 61

4 times