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NEHA RS Test > Pools > Flashcards

Pools Flashcards

1
Q

improper use of chems may cause

A

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

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2
Q

swimmers have a higher over all illness rate than non swimmers

A

regardless of nothing water quality

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3
Q

swimming pools need

A

recalculation, filtrations, proper operations

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4
Q

.5 NTU

A

shall not be exceeded

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5
Q

pool filtration system should filter entire volume of water every

A

6-8 hours

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6
Q

rate of filtration for diatomite filter shoudl be

A

1- 2 gpm

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7
Q

chems used for pools include chlorine, chlorisocynaurates, bromine and

A

iodine

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8
Q

gutters or skimmers receive a minimum of _ total pool water

A

60%

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9
Q

most effective method for pools maintenance is

A

continuous recirculation, chlorination, filtration

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10
Q

eye irritation can occur when ph is

A

below 7.4 or or 7.0

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11
Q

advantage of cynauric acid additive is

A

stabilized residual chlorine

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12
Q

acidity/alkilinity balances affects eye irritation water coagulation and

A

effectiveness of chlorine

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13
Q

addition of sodium bicarbonate

A

raises alkalinity

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14
Q

to raise PH

A

soda ash

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15
Q

acid to to water

A

add acid to water

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16
Q

chem to improve water clarity

A

alum

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17
Q

control of swimmers itch

A

add copper sulfate

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18
Q

preferred method for controlling sewage

A

on board holding tanks

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19
Q

swimmers itch is know as

A

schistosomiasis

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20
Q

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

A

cloudy water

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21
Q

skin infections in hot tubs

A

pseudomonas aer

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22
Q

water in wading pools should be completely recirculated every

A

60 minutes

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23
Q

free chlorine residual at

A

1.0- 3.0 mg.liter

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24
Q

ph for pools

A

7/2 - 7-6

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25
Q

swimming pool shave had many diseases including

A

leptrospirosis

26
Q

prohibited swimming pool is a

A

fill and draw pool

27
Q

its essential that pools

A

run their recirculation and disinfections equipment 24 hours a day

28
Q

bottom slops not greater than

A

1in per 12 inches

29
Q

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

A

may utilize gutters rather than skimmers

30
Q

pools must be designed to

A

fit expected number of swimmers

31
Q

approved swimming pols must

A

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

32
Q

fresh water supply pool must

A

fill pool with air gap

33
Q

connection of pool drain to sewer system must

A

have a properly located cleanout

34
Q

recognize a well designed pool is

A

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

35
Q

when closing is added to water

A

to acids are formed

36
Q

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

A

62 percent molecular at 7.2ph

37
Q

a ph for optimal minimized eye irritation

A

7.5 to 7.6

38
Q

gas chlorine is

A

100 percent chlorine

39
Q

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

A

20 times higher

40
Q

preparations for mass agterhinls include

A

plan, refuse storage, noise control

41
Q

not likely to be contracted at a beach

A

spinal meningitis

42
Q

Public health factor primary important in determining sanitary of rec water

A

chlorofrom

43
Q

Naegleria fowler is linked to

A

primary amoebic meningeoncehphilitis

44
Q

organism that would survive in a hot tub

A

pseudomanas aero

45
Q

secchi disk is used to

A

clarity of water

46
Q

chem used for pool aklinity

A

sodium bicarbonate

47
Q

ph for least eye ittitation

A

7.6

48
Q

reason a pool should stay below 8

A

decreases amount of active chlorine

49
Q

bromine residual with DPD test

A

multiply chlorine by 2.25

50
Q

pool quality tests

A

PH and Chlorine residual

51
Q

what raises pH

A

sodium carbonate

52
Q

compounds thats a principal scale former

A

calcium carbonate

53
Q

algae control

A

super chloroniation

54
Q

best method to eliminate swimmers itch

A

break chain of schistosome

55
Q

methods of rec waters may be contaminated

A

infected people, surface runoff, water flora

56
Q

pols that are brown

A

MN

57
Q

reduce drying accidents

A

develop training

58
Q

muaritic acid is weak solution of

A

hydrochloric acid

59
Q

situation where to find PAM

A

geothermal pool

60
Q

Pool Flow diagram

A

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

61
Q

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

A

4 times

NEHA RS Test (8 decks)

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