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Prevmed 2 > Manage Potable Water Surveillance > Flashcards

Manage Potable Water Surveillance Flashcards

1
Q

Coaming:

A

A raised frame to keep water out

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2
Q

Distillation:

A

Total process the distilling plant forms, including evaporation and condensation.

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3
Q

Free Available Chlorine

A

Chlorine Available (after the demand is met) in the forms of hypochlorous acid and hypochlorite ions

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4
Q

Micron:

A

unit of length, one millionth of a meter

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5
Q

Point of use:

A

a treatment device applied to a single tap used for the purpose of reducing contaminants in drinking water at that tap.

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6
Q

Potable water:

A

water that is sustainable for human consumption

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7
Q

Reverse Osmosis:

A

reverse of the natural osmosis achieved by external application of sufficient reverse pressure to cause the solvent to flow in its unnatural direction

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8
Q

Colilert / Colisure:

A

test used to detect total coliform and E-coli in potable water

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9
Q

Total Coliform:

A

total number of mostly harmless bacteria that live in soil and animal guts. the number of tot al coliforms indicates the likelihood of fecal matter in the water

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10
Q

E. Coli:

A

type of fecal coliform commonly found in the intestines of animals and humans. the presence of e. coli indicates recent sewage contamination.

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11
Q

NAVSEASYSCOM responsibilities for water afloat:

A
  • assure safe drinking water at all times
  • design
  • construction
  • maintenance
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12
Q

Naval Facilities Engineering Command (NAVFACENGCOM) water responsibilities:

A
  • ship - to - shore connections for water
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13
Q

BUMED water responsibilities:

A
  • establishing health standards for water quality afloat
  • create appropriate instructions, notices, or other publications to reflect afloat water quality requirements
  • sets requirements for medical surveillance of potable water systems
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14
Q

who is responsible for implementing water requirements? (treating and water supply)

A

Engineering department

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15
Q

what are components of the water system?

A
  • Receive
  • Store
  • Distribute
  • Produce
  • Treat
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16
Q

Engineering department responsibilities for water:

A
  • daily halogen testing
  • PH testing
  • supply and treat water
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17
Q

how much water is allotted per person per day?

A

50 gallons

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18
Q

how must water is used per person per day while under water rations?

A

2 gallons

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19
Q

when must a ship refrain from making water?

A
  • in harbor or polluted seawater
  • when in close formation with other ships
  • when discharging waste forward of the seawater tanks
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20
Q

what other military forces may we take water in from?

A
  • British Royal Navy
  • Canadian forces
  • Royal Australian Navy
  • all other OCONUS locations must be approved by us military representatives or NEPMU
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21
Q

what FAC must Shore-to-ship water be prior to receipt?

A

2.0ppm

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22
Q

what are the types of distillation plant?

A
  • Steam distilling
  • waste heat distillation plant
  • vapor compression (uses electrical energy)
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23
Q

Types of Reverse osmosis?

A
  • single pass (requires additional disinfection)

- triple pass

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24
Q

what standards must potable water meet?

A
  • NSF

- ANSI

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25
Q

what are unauthorized termination points for water lines?

A
  • food spaces
  • medical spaces
  • toilets
  • electrical spaces
  • ship exterior
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26
Q

how do you sanitize a sounding tube?

A

100ppm FAC for 2 minutes

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27
Q

what requirements must filling connections meet?

A
  • clearly labeled
  • color coded dark blue
  • 18 inches from the deck
  • turned facing downward
  • screw caps with keeper chain
28
Q

potable water hose lockers must be:

A
  • vermin proof
  • locked
  • 18 inches off the deck
  • printed step by stem instructions for disinfection process
29
Q

potable water hoses must be:

A
  • approved for potable water use
  • examined routinely
  • removed from use when cracks and leaks show up
  • capped/coupled or stored in a hose locker
  • not used for any other purpose
30
Q

what must be written on potable water lines?

A

“POTABLE WATER ONLY” written every 10 feet in 1 inch high lettering

31
Q

what is the minimum halogen residual when receiving water from an approved source?

A

0.2

32
Q

what do you do when the water quality is doubtful?

A
  • notify CO
  • investigated and examined thoroughly
  • minimum residual is 2.0 ppm
33
Q

when making a ship to shore connection how long do you let the water flush?

A

15-30 seconds

34
Q

when do you use each halogen?

A
  • Bromine (out to sea)

- Chlorine (in port)

35
Q

what does the absence o a halogen residual indicate?

A

POSSIBLE contamination

36
Q

what does a BACTI test tell you?

A
  • ensure fit for human consumption

- assess adequacy of disinfection process

37
Q

is halogenation more effective at warmer or colder water?

A

warmer

38
Q

how often does medical check the halogen residual?

A

Daily

39
Q

for a crew of 400 or less how many samples do you collect a week?

A

4 plus potable water tanks

40
Q

for a crew of 400-800 how many water samples do you collect a week?

A

8 plus potable water tanks

41
Q

for a crew of 800+ how many weekly samples do you collect a week?

A

12 plus potable water tanks

42
Q

how often do you test your emergency potable water tank for BACTI?

A

monthly

43
Q

FAC

A

Free available chlorine

44
Q

TBR

A

Total bromine Residual

45
Q

what is used to test for halogen residual?

A

DPD #1

46
Q

what do you use to test for total chlorine residual?

A

DPD #4

47
Q

how accurate is a color comparator?

A

+/- 10%

48
Q

how accurate is the portable Spectrophotometer?

A

+/- 2%

49
Q

how much of your ice machines get tested for BACTI every week?

A

1/4

50
Q

what do you put in water to test for coliforms?

A
  • Colilert

- Colisure

51
Q

what does a BACT test that fluoresces under blacklight mean?

A

Positive for E. Coli

52
Q

what are some common sources of water contamination?

A
  • leaks
  • cross connection with non potable water
  • improper disposal of chemicals
  • hoses used for non potable water
  • excessive storage time
  • inadequate disinfection
53
Q

two types of water disinfection procedures

A
  • automatic chlorine disinfection

- Brominator

54
Q

what is the least desirable water disinfection process?

A

Batch Method

55
Q

one OZ of HTH per 5,000 gallons of water Equals what FAC?

A

1.0 FAC

56
Q

what is the minimum FAC/TBR for water from an approves source?

A

0.2 FAC

57
Q

what is the minimum FAC/TBR for water from an unapproved source?

A

2.0 FAC

58
Q

potable water system method 2 first step?

A

Spray walls of tank with 200ppm

59
Q

shipboard potable system sanitization method 1:

A

add chlorine to achieve 10ppm through tank

60
Q

potable system method 3:

A

fill 5% of tank with 50ppm Solution

61
Q

what taste and odor control requires NAVSEA approval?

A

Steam method

62
Q

what size bottle does HTH come in?

A

6oz

63
Q

how often does medical inspect HTH lockers?

A

Quarterly

64
Q

what is the strength of granular Calcium Hypochlorite? (HTH)

A

65-70%

65
Q

how must HTH lockers be labeled?

A

“Hazardous material, calcium hypochlorite” on red letters with a white background

66
Q

who creates the ship waterbill?

A

CO

67
Q

who will maintain the potable water record and how long?

A

Medical for 2 years

Prevmed 2 (9 decks)

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