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NAVMED P-5010 Ch09
Manual of Naval Preventive Medicine Ch 9: Ground Forces
| Question | Answer |
|---|---|
| What information does Chapter 9 of NAVMED P-5010 cover? | Preventive Medicine for Ground Forces |
| What information does Section II of Chapter 9 of NAVMED P-5010 cover? | Water Supply Sanitation in the Field |
| Who is ultimately responsible to ensure there are sufficient quantities of safe water for their personnel? | Unit commanders |
| Who is responsible for providing sufficient potable water for he population to be served? | Engineers |
| Who is responsible to advise the commanding officer on water quality issues? | The medical department |
| Who must be familiar with, and follow, proper water discipline? | All personnel |
| True or False. All water sources in the field should be considered unsafe until they've been evaluated and approved by the medical department. | True |
| Where may water be obtained from in the field? | Rivers, streams, ponds, lakes, wells, ice, snow, and oceans. |
| What three factors are considered when choosing a raw water source? | Quantity, quality and accessibility. |
| What are potential sources for water? | Existing public water systems, surface water, ground water, salt water, and other sources. |
| Ground water sources must be located at least how many feet from all existing sources of contamination? | 100 feet, and situated so that the drainage is away from the well or spring |
| What must be done with salt water before it is consumed? | It must be desalinated and disinfected |
| What processes can be used to treat and purify water? | Aeration, coagulation, flocculation, filtration, reverse osmosis, and disinfection |
| What are two examples of equipment currently used to purify water? | ROWPU and ERDLATOR |
| What is the preferred agent for disinfecting potable water? | Calcium hypochlorite, 50-70% (HTH), because it comes in granular form, has a long shelf-life and is readily available from the Navy stock system. |
| What are two other forms of chlorine that can be used to disinfect potable water? | Sodium hypochlorite (5 or 10%) and chlorine gas. |
| What is the first step to chlorinating with HTH? | Make a small amount of HTH contained by dissolving a measured amount of calcium hypochlorite granules in a clean container of water. Stir thoroughly. |
| What is the second step to chlorinating with HTH? | Pour the supertanant into the water to be disinfected. Provide sufficient agitation to promote thorough mixing. |
| What is the final step in chlorinating with HTH? | Take a measurement of the resulting FAC 30 minutes after adding the chlorine. |
| What is the required chlorine residual for public water systems of questionable quality? | 5 ppm FAC after a 30 minute contact time and maintain at a minimum 2 ppm FAC throughout the distribution system. |
| What is the required chlorine residual for engineering water points? | 5 ppm at the standpipe or fill-hose. |
| What is the required chlorine residual for water tankers, trailers, bladders, and cans? | Between 5 and 2 ppm |
| What is the required chlorine residual for a distribution (piping) system? | 5 ppm at the source and 2 ppm at the spigot. |
| What is the required chlorine residual for lyster bags and canteens? | 2 ppm from aproved water sources. |
| What process is used to disinfect water containers and distribution systems initially or when they have become contaminated? | Superchlorination |
| How is superchlorination accomplished? | By chlorinating the water in a container or distribution system to at least 100 ppm and holding it in the container for 4 hours. |
| What residual must superchlorinated water be after 4 hours of contact time? | 50 ppm |
| What may be used in place of water purification tablets when purifying water in small containers such as canteens or water jugs? | Tincture of iodine 2%; five drops per quart; ten drops if the water is cloudy. |
| How many water purification tablets are used to purify a 5 gallon container? | 40 iodine tablets. |
| What are the disadvantages of boiling water to purify it? | Fuel is required, it's time consuming, and there's no residual substance in the water to guard it against contamination. |
| How must all containers used for the treatment, storage or distribution of water be labeled? | "Potable water" |
| As a rule of thumb, what is the minimum amount of water required for an advanced base medical facility per medical treatment bed per day? | 65 gallons |
| Where must FAC testing be recorded? | In the Medical Department Water Log. |
Created by:
RabbittDK10
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