3e451 Volume 4 Contingency Operations

Blue color band designates reverse osmosis water purification piping that carries product water. This color coding system is used to easily identify the type of fluids or substances being transported in pipes. In this case, blue is specifically used for product water in reverse osmosis systems. It helps prevent cross-contamination and ensures that the water being transported is safe for consumption.

Grease slows down the evaporation process in electric kitchens' evaporation beds. This is because grease forms a layer on the surface of the liquid, creating a barrier that inhibits the evaporation of water. As a result, the evaporation process is hindered and takes longer to occur.

During the initial setup of the reverse osmosis water purification unit (ROWPU), all chemical feed valves must be set to "Prime." This means that the valves are opened to allow the chemicals to flow through the system and fill the necessary chambers or tanks. This is done to ensure that the system is properly primed and ready for operation. The other options, "Off," "Feed," and "Standby," do not accurately describe the necessary action during the initial setup of the ROWPU.

The optimum pH of water going through the reverse osmosis elements in the reverse osmosis water purification unit is between 5 and 8. This is because reverse osmosis membranes are most effective in removing contaminants at a pH range of 5 to 8. Water with a pH below 5 or above 8 can potentially damage the membranes and reduce their efficiency. Therefore, maintaining the pH within this range ensures optimal performance and longevity of the reverse osmosis system.

The correct answer is differential pressure. The multimedia filter pressure gauge on the reverse osmosis water purification unit is used to measure the difference in pressure between the inlet and outlet of the multimedia filter. This difference in pressure, known as the differential pressure, indicates the level of filtration occurring within the filter. By monitoring the differential pressure, operators can determine when the filter needs to be cleaned or replaced to maintain optimal filtration efficiency.

You are not responsible for repairing the M-80 boiler in the shower facility.

The color comparator is used to test the levels of chlorine and pH in a substance. It is a tool that compares the color of a sample with a set of color standards to determine the concentration of chlorine or the pH level. This is important in various applications such as water treatment, swimming pool maintenance, and testing the quality of drinking water.

Burying piping is the best way to protect it from solar radiation. By burying the piping underground, it is shielded from direct exposure to sunlight, reducing the risk of damage or degradation caused by solar radiation. This method provides a physical barrier between the piping and the sun, effectively minimizing the effects of solar radiation on the pipe's integrity and lifespan.

Reverse osmosis water purification units are highly effective in removing impurities from water, including organic material. The given correct answer of 99% implies that the reverse osmosis unit removes almost all of the organic material present in the water, leaving it significantly purified. This high percentage indicates the efficiency and reliability of reverse osmosis as a water purification method.

When the pH reads between 5-8, the critic acid chemical feed valve is set back to the prime position. This suggests that the critic acid chemical feed valve should be adjusted when the pH level of the solution is within the range of 5 to 8. This range indicates that the solution is neither too acidic nor too alkaline, and adjusting the valve at this point helps maintain the desired pH balance.

Polymer is used as a coagulant aid during the reverse osmosis water purification unit treatment process. Coagulant aids are substances that help in the formation of larger particles, making it easier to remove impurities during the purification process. Polymers have high molecular weights and can bind to smaller particles, creating larger flocs that can be easily separated from the water. This aids in the removal of suspended solids and other contaminants, improving the efficiency of the reverse osmosis water purification process.

The correct answer is 1 Part per million at the point of use. This means that the chlorine residual in a Basic Expeditionary Airfield Resources water distribution system should never be lower than 1 part per million when it reaches the point of use, such as when it is consumed by individuals. This ensures that the water is adequately treated and safe for consumption, as chlorine is commonly used as a disinfectant to kill harmful bacteria and pathogens in water.

If the pressure switch on the 35 gpm electric pump is not operating properly, the first step to take to correct the problem after de-energizing the unit is to clean the contacts. This is because dirty or corroded contacts can prevent proper electrical connection and cause the switch to malfunction. By cleaning the contacts, any dirt or corrosion can be removed, allowing for better electrical conductivity and potentially resolving the issue with the pressure switch.

To ensure that all the air has been released from the self-help laundry's heater, you should open the water heater relief valve until water appears. This is because when air is trapped in the heater, it can reduce its efficiency and potentially cause damage. By opening the relief valve, any trapped air will be released and replaced by water, allowing the heater to function properly.

Yellow color band designates reverse osmosis water purification piping that carries filtered water.

The H-9518-2 reverse osmosis water purification unit produces an average of 600 gallons per hour.

A multiport valve is used to backwash the multimedia filter on a reverse osmosis water purification unit. This type of valve has multiple ports or openings that allow for different flow directions and functions. In the case of backwashing the multimedia filter, the multiport valve is used to reverse the flow of water through the filter, flushing out any accumulated debris or contaminants. This helps to maintain the efficiency and effectiveness of the filter in removing impurities from the water.

Setting up the reverse osmosis water purification unit 100 feet upstream from the campsite ensures that the purified water is not contaminated by any potential pollutants or contaminants that may be present downstream. This distance allows for a sufficient buffer zone to prevent any potential contamination and ensures that the purified water is safe for consumption.

Storm drains are located underground, which makes the repair process time-consuming. Unlike aboveground structures that are easily accessible, underground storm drains require additional effort and resources to locate and access. This involves excavating the ground, removing debris, and potentially dealing with other underground utilities. The complexity of working underground adds to the time required for repairs.

Before loosening the eyebolts of the reverse osmosis water purification unit cartridge filter cover, you should mark the position of the cover. This is important because it ensures that the cover is properly aligned and can be easily reinstalled after maintenance or cleaning. By marking the position, you can easily realign the cover and avoid any potential leaks or damage to the filter.

The 550 follow-on subsystem is functionally identical to the 550 initial subsystem.

The industial operations and flightline extension subsystem provides hose rollover protection ramps to protect the water distribution system piping from damage. These ramps are designed to prevent hoses from being crushed or damaged when vehicles or equipment drive over them. By providing a raised surface for the hoses to pass over, the ramps ensure that the piping remains intact and undamaged, reducing the risk of leaks or breaks in the water distribution system.

Osmosis is the correct answer because it refers to the movement of water through a permeable membrane from an area of lesser concentration to an area of higher concentration. This process occurs in order to equalize the concentration on both sides of the membrane. Reverse osmosis, reverse filtration, and inverse pressure do not accurately describe this specific movement of water.

The two deionization cartridges are packed in the second layer of the H-9518-2 model reverse osmosis water purification unit.

The correct answer is Air Force theater hospital. This medical facility is housed in a combination of tent expandable modular personnel and Alaskan tents. It is designed to be easily transportable by air and can be set up quickly in a theater of operations. The use of tents allows for flexibility and adaptability in different environments. The Air Force theater hospital provides medical care and support to military personnel in a deployed setting.

A deep pit latrine is the most suitable option for a prolonged deployment because it can hold a larger volume of waste and requires less frequent emptying compared to other options. This type of latrine is dug deep into the ground, allowing for the decomposition of waste over time. It is a more hygienic and convenient solution for long-term use in areas with limited access to proper sanitation facilities.

WPES-20 and H-9518-2 are specifically designed for the U.S. Air Force.

In order to ensure the safety and quality of the product water produced by the reverse osmosis water purification unit, it is necessary to maintain a certain level of chlorine residual. Unless specified otherwise by medical authorities, the correct answer is to keep 2 parts per million of chlorine residual in the product water. This level of chlorine residual helps to disinfect the water and prevent the growth of harmful bacteria or microorganisms.

The correct answer is Multimedia filter influent. Sodium hex is fed by the reverse osmosis water purification unit chemical feed pump at the multimedia filter influent. This means that the sodium hex is being introduced into the water at the point where it enters the multimedia filter. The multimedia filter is an important part of the water purification process, as it helps to remove suspended solids and other impurities from the water before it goes through the reverse osmosis element.

Choosing a clear water source for the reverse osmosis water purification unit (ROWPU) will result in less frequent backwashings. This is because clear water sources are relatively free of pollutants, which means there is less buildup and clogging in the system. As a result, the unit will require fewer backwashings to clean and maintain its efficiency.

The highest allowable temperature of "mixed" water from the shower/shave pump assemblies temperature regulator is 115 F. This means that the water temperature should not exceed 115 degrees Fahrenheit when using the shower or shave pump assemblies.

The shower facilities pump assembly suction strainer should be checked for clogging on a daily basis. This is important to ensure that the pump is functioning properly and to prevent any blockages that could cause disruptions in water flow. Regularly checking the strainer will help maintain the efficiency and longevity of the pump system.

The correct answer is Backwash. During the reverse osmosis element cleaning process, the backwash pump is used to recirculate the citric acid solution. This pump helps to remove any accumulated deposits or scaling on the reverse osmosis elements, ensuring their proper functioning and increasing the efficiency of the water purification unit.

The correct answer is "It becomes filled with dirt to within 1 foot of the surface." This is because when the trench latrine is filled with dirt to within 1 foot of the surface, it indicates that the latrine is almost full and needs to be closed. Closing the latrine at this point is important to prevent any overflow or contamination.

If a lift station pump is running backwards, it is likely because the phase voltage is incorrect. Phase voltage refers to the voltage supplied to each phase of a three-phase electrical system. If the phase voltage is incorrect, it can cause the pump to run in the opposite direction. This issue can be resolved by ensuring that the correct phase voltage is supplied to the pump.

When a water bladder is placed on rocky or uneven surfaces, it is important to provide a layer of sand underneath to create a stable and level base. The question asks for the amount of sand required, and the correct answer is 2 inches. This means that a layer of 2 inches of sand should be placed under the water bladder to ensure proper stability and support on rocky or uneven surfaces.

The reverse osmosis water purification unit reverse osmosis element cleaning procedure is stopped after 45 minutes has expired.

When citric acid feeding and both element cleaning methods are not effective, it indicates that the reverse osmosis elements are not being properly cleaned and maintained. This can lead to a decrease in the efficiency and effectiveness of the water purification unit. Therefore, it is necessary to replace the reverse osmosis elements to ensure the proper functioning of the unit and maintain the quality of the purified water. The other options mentioned, such as backwashing the elements or repairing damaged connectors, do not address the issue of ineffective cleaning methods and therefore are not the correct answer.

The self-help laundry provides five washers and five double-stacked dryers.

The correct answer is 40W4-13-4.

The correct answer is fine gravel, small stones, and large stones. This order is important because it allows for proper filtration and drainage of urine in a soakage pit. The fine gravel acts as the first layer to filter out smaller particles, followed by small stones to further filter and create a stable base. The large stones are then placed on top to prevent clogging and allow for proper drainage.

The 1500 gph ROWPU water production subsystem consists of 2 reverse osmosis water purification units (ROWPU).

If a showerhead continues to drip after the shower valve has been closed during the initial run up of the shower facility, it is considered normal. There is no need to take any action or make any adjustments. This is a common occurrence and does not indicate any issue or malfunction with the shower valve or any other component.

To determine if the dual pump stations accumulator has become waterlogged after long pump runs, you need to depress the air valve. By doing so, you can release any excess air that may have accumulated in the system. If water comes out instead of air, it indicates that the accumulator has become waterlogged. This can cause issues with the pump's performance and may require further inspection or maintenance.

Planting grass is an effective measure to prevent erosion of a completed landfill. Grass has a dense root system that helps stabilize the soil and prevent it from being washed away by water or blown away by wind. The roots of grass also help in absorbing excess water and reducing runoff, which further helps in preventing erosion. Additionally, grass provides a protective cover over the soil, reducing the impact of raindrops and promoting infiltration. Overall, planting grass is a cost-effective and environmentally friendly solution to prevent erosion in landfills.

When expanding water facilities, it is important to ensure that the capacity of small dams and reservoirs can impound at least the total daily flow. This means that the amount of water that can be stored should be able to accommodate the daily flow rate of water in order to meet the demands of the community or area being served. By having this capacity, the water facilities will be able to effectively store and distribute water on a daily basis, ensuring a reliable water supply for the population.

The correct answer is 60. This means that the mesh size of the basket strainer installed upstream of the R-22 pumping unit is 60. A basket strainer is a device used to remove unwanted particles and debris from a fluid flow system. The mesh size refers to the size of the openings in the strainer basket, which determines the size of particles that can be filtered out. In this case, a mesh size of 60 indicates that the strainer can effectively remove particles of a certain size from the fluid flow.

The initial setting of all the chemical pump control knobs on the reverse osmosis water purification unit is 10.

A 3-person team should take approximately 45 minutes to complete an in-crater repair on a 6 to 8 inch pipeline. This time frame allows for efficient and timely completion of the repair task, ensuring that the pipeline is fixed promptly.

The capacity of the reverse osmosis water purification raw water pump is 30 gpm. This means that the pump is capable of pumping 30 gallons of water per minute.