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Prevmed 2 > 6-13 Water > Flashcards

6-13 Water Flashcards

1
Q

Define coaming

A

A raised frame (as around a hatchway in the deck of a ship) to keep out water

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2
Q

Define distillation

A

The total process the distilling plant forms, including evaporation and condensation

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3
Q

Define Free Available Chlorine (FAC)

A

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

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4
Q

Define micron

A

A unit of length. 1 millionth of a meter

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5
Q

Define 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

Define potable water

A

Water suitable for human consumption, laundry, bathing and personal hygiene

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7
Q

Define reverse osmosis

A

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

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8
Q

What is colilert/colisure

A

Tests used to detect total coliform and E. coli in the potable water

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9
Q

What is total coliform

A

A group of closely related of mostly harmless bacteria that live in soil and water and also guts of animals. Extent of total coliform in water can indicate cleanliness of water and likelihood of E. Coli

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10
Q

What is E. Coli

A

Type of fecal coliform bacteria commonly found in intestines of animals and humans. Short for Escherichia Coli.

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11
Q

Presence of E. Coli in water is a strong indication of what?

A

Recent sewage or animal waste contamination.

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12
Q

Who is responsible for SHIPBOARD potable water systems, including treatment facilities and processes to assure that safe drinking water is available at all times. Design, construction, maintenance.

A

NAVSEASYSCOM

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13
Q

Who is responsible for promulgating instructions for ship to shore portable water connections in for providing potable water from an approved source when the ship is berthed at a naval facility

A

Naval Facilities Engineering Command

NAVFACENGCOM

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14
Q

Who is responsible for establishing and promulgating health standards for water quality afloat?

A

Chief, BUMED

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15
Q

Who promulgates appropriate instructions, notices, or other publications to reflect afloat water quality requirements?

A

Chief, BUMED

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16
Q

Who establishes a shipboard requirements for medical surveillance of potable water systems?

A

Chief, BUMED

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17
Q

Who is responsible for promulgating a water sanitation bill to ensure that procedures for seat transfer treatment storage distribution in surveillance are provided and followed?

A

Commanding Officer

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18
Q

Who is responsible for issuing the necessary implementing directives to ensure the adequate water sanitation standards are provided in a force in each ship within command?

A

Area, fleet, and subordinate commanders

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19
Q

Who is responsible to the CEO for implementing the requirements of the NAVSEASYSCOM?

A

Engineering Department

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20
Q

Who is responsible for potable water systems that receive, store, distribute, produce, and treat?

A

Engineering department

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21
Q

Who insures ship to shore and ship to ship connections are made only by authorized personnel, one available, or in their absence, ship personnel who are properly supervised by authorized personnel?

A

Engineering Department

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22
Q

Who is responsible for halogen and pH testing?

A

Engineering department

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23
Q

Who is responsible for conducting a medical surveillance program of the potable water system, bacteriological testing and daily halogen testing?

A

SMDR

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24
Q

Who notify is the CEO of any discrepancies observed in the pot of water distribution system?

A

SMDR

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25
For new ship construction, how many gallons per man per day does NAVSEASYSCOM plan for in design considerations?
50
26
How many gallons per man per day during "Water Hours" and who does it particularly apply to?
No less than 2 gallons per man per day. Applies to troop carrying ships loaded beyond water producing capacity
27
Sea water is used for what?
Fire mains, decontamination and for Marine Sanitation Devices (MSDs) flushing
28
What are the approved sources of potable water?
Distillation, RO, or other NAVSEASYSCOM approved technology Shore-to-Ship from approved sources Shore-to-Ship from unapproved sources Ship-to-Ship
29
What are the requirements to receive a Shore-to-Ship delivery from an unapproved source?
Water has to be treated to minimum of 2.0 ppm prior to receipt
30
Who must approve state and territory public water systems for Shore-to-Ship?
Environmental Protection Agency (EPA)
31
What are the establishments approved as Shore-to-Ship sources for U.S. military?
British Royal Navy Canadian Forces Royal Australian Navy Other OCONUS locations may be obtained from Navy Environmental Preventive Medicine Units (NEPMU)
32
A ship should avoid making water while operating in what?
Harbors or from polluted seawater When ships are in close formation When stripping or discharging waste or bilge water forward of the saltwater intakes
33
What are the types of distillation plants and how are they powered?
Steam- Steam from power plant/auxiliary boiler Waste heat- Heat from Diesel engine jacket water Vapor compression- Electrical Energy
34
In regards to RO, at what pressure is the filtered water boosted to to pass through RO membranes?
1000 psi
35
In regards to RO, what percent of filtered water permeates through the membrane to become fresh water?
20-25%
36
In regards to RO, what pass requires disinfection after and which doesn't?
Singles requires disinfection, triple doesn't.
37
When can you fill potable tanks with ballast water?
When necessary for ships survival
38
Potable water tanks are coated with what?
NSF/ANSI standard coating
39
What is the purpose of vents and overflow lines and their specifications?
Located to reduce accidental contamination. Openings screened with 18 gauge of finer, non-corrosive mesh
40
Where are vents and overflow lines unauthorized?
``` Medical spaces Food service spaces Exterior of ship Toilets Electrical or electronic rooms ```
41
In regards to manholes, if the top of tank is also a deck, what is required and what it's ok the side?
Top- 1/2" curb or coaming above deck | Side- Flush mount ok
42
If sounding tubes do not have sounding rods, what do they require? And what do ALL sounding tubes have labeled on them?
Steel tape that is disinfected with 100ppm for 2 min | POTABLE WATER USE ONLY
43
What are the specifications for filling connections (hose valves, risers)?
``` Clearly labeled Color coded dark blue 18in from deck Turned facing downward Screw caps with keeper chains ```
44
What must potable water filling lines which distribute potable water to non-potable water tanks have?
An air gap or approved and appropriate back flow prevention device
45
What must potable water piping passing through non-potable water tanks have?
Pipe surrounded by a sloped self draining pipe tunnel
46
The potable hot water settings should be set at the fixture so that the water is what temperature at the tap?
120 F
47
What are the specifications of the potable water hose lockers?
Vermin proof Locked 18in off deck (when located on weather decks and sponsons) Instructions for disinfection of hoses and risers
48
What are the sanitary requirements for potable water hoses?
Approved for potable water use, examined routinely, removed from use when cracks develop in the lining or leaks occur, capped or coupled and stored in hose locker when not in use
49
How are potable water hoses labeled?
"POTABLE WATER ONLY" in 1" letters every 10' | Couplings are dark blue
50
How are valves for receiving or supplying potable water (risers) labeled?
Warning plate w/ "POTABLE WATER ONLY" in 1/4" font | Valves or valve handles dark blue
51
How are sounding tubes labeled?
Clearly labeled with ID plate | Sounding tube cap dark blue
52
Who supervises potable water connections between shore and ship?
Authorized shore personnel or properly trained ship personnel
53
What must engineering do before making a potable water hose connection?
Notify MDR
54
What is the minimum halogen residual requirements for water down for quality?
2.0 PPM
55
What is the purpose of testing halogen residual (chlorine/bromine)?
Quick indication that water may have been improperly treated or handled.
56
Though absence of halogen residual indicates contamination, how do you confirm?
Bacteriological testing. Ensures fit for human consumption
57
Who publishes the "Standard of Methods for the Examination of Water and Wastewater"?
American Public Health Association (APHA) American Water Works Association (AWWA) Water Pollution Control Federation (WPCF)
58
Who performs testing of temperature and pH?
Routinely performed by Engineering Department
59
When is halogenation most effective?
Warmer water temps
60
When testing salinity, what is the limit for chloride?
0.065 Equivalent per Million (epm) or 2.3 ppm
61
Do you perform salinity testing on halogenated water?
No, halogenated water will provide false results
62
When is it allowed to have trace amounts of chlorine?
At distal ends of the distribution systems of large ships.
63
When does MDR perform halogen tests?
Daily In conjunction with bacterial analysis Prior to receipt of water
64
Who is responsible for checking the halogen level after a 30 min contact time?
Engineering Department
65
Who establishes the maximum contaminant level?
Environmental protection agency
66
How many BACT tests for crews of 400 personnel or less?
No less than 4
67
How many BACT for crews over 400-800 personnel?
8 samples
68
How many BACT for crews more than 800 personnel?
12 samples
69
How often is the emergency potable water tank tested?
Monthly
70
For BACT testing, what is required for the ice machines and potable water tanks?
Samples will include 1/4 of them
71
If you have a positive BACT sample, what is required?
3 repeat samples. All wishing 24 hours of positive sample 1 from original problem source 1 from upstream (no more than 5 connections) 1 from downstream (no more than 5 connections)
72
What is DPD #1 for?
Testing FAC or TBR
73
What is DPD #4 used for?
Testing chloramines (total chlorine) residuals
74
What is the accuracy of the color comparator?
+ or - 10%
75
What is the accuracy of the portable spectrophotometer?
+ or - 2%
76
What using the color comparator kit and the color is deeper than 5.0 ppm chlorine or 11.0 ppm bromine, what action should you take?
Add an additional DPD #1
77
What should you do if there are continual absences of halogen residuals?
Report to CO and give a copy to the CHENG
78
When should you perform bacteriological tests?
Weekly, abnormal halogen, suspicions of contamination, and after repairs to potable water systems
79
When using colisure, what does yellow mean?
Negative
80
When using colisure, what does magenta mean?
Positive for total coliforms
81
When using colisure, what does fluorescent light blue mean?
Positive for E. Coli
82
What is the purpose of In-line chlorinators?
Injects hypochlorite into system in proportion to flow of water
83
How is bromine dispensed?
Via resin impregnated cartridge
84
Describe an in-line (proportioning) Brominator.
Preset to deliver 0.7 ppm bromine to water during normal operating procedures Can deliver 2.0 ppm bromine to water when necessary Required for each water plant
85
Describe the recirculating brominator
Designed to boost bromine residual in potable water tank Draws water from the tank, injects bromine, and returns water to same tank Delivers 0.7 ppm bromine to water being recirculated
86
How many days supply of calcium hypochlorite shall be maintained?
Seven
87
What are the holes drilled in the bottom of the HTH box?
Three 1/4" holes to allow release of chlorine gas
88
Where shall the HTH boxes not be installed?
``` Machinery space Flammable liquids storeroom Berthing Paint storeroom Oil and water test lab areas ```
89
Steps to control taste and odor?
1. Identify 2. Chlorination method. Chlorinate to 5ppm and distribute 2ppm 3. Steam method. Requires NAVSEASYSCOM approval. Boil for 1 min 4. Contact NEPMU via TYCOM MO
90
What is Method 1 for disinfecting potable water system?
1. Fill tank to over flow level 2. Add chlorine to achieve 10pm FAC through the tank. Hold for 24 hrs 3. Drain tank 4. Refill with potable water with required halogen residual level 5. Perform BACT

Prevmed 2 (7 decks)

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