The United States Air Force Wfm Trivia Quiz!

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1. Which chemical is used as a coagulant aid during the reverse osmosis water purification unit treatment process? Which chemical is used as a coagulant aid during the reverse osmosis water purification unit treatment process?Which chemical is used as a coagulant aid during the reverse osmosis water purification unit treatment process?  

Explanation

Polymer is used as a coagulant aid during the reverse osmosis water purification unit treatment process. It helps in the coagulation of suspended particles and impurities in the water, allowing them to be easily removed during the purification process.

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About This Quiz
The United States Air Force Wfm Trivia Quiz! - Quiz

The United States Air Force WFM Trivia Quiz tests knowledge on reverse osmosis water purification units used in the Air Force, focusing on specifics such as designations, capacities,... see moreand fundamental processes. It's designed for personnel to enhance operational understanding and efficiency. see less

2.  What percent of organic materials in water is removed by the reverse osmosis water purification unit? 

Explanation

The reverse osmosis water purification unit removes 99% of organic materials in water.

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3. The multimedia filter pressure gauge on the reverse osmosis water purification unit indicates:

Explanation

The multimedia filter pressure gauge on the reverse osmosis water purification unit indicates differential pressure. This means that it measures the difference in pressure between two points in the system. In the case of the multimedia filter, it measures the pressure difference across the filter media, indicating the level of clogging or buildup. This information is important for maintenance and ensuring optimal performance of the water purification unit.

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4. During initial start-up of the reverse osmosis water purification unit (ROWPU), all chemical feed valves must be set to:

Explanation

During the initial start-up of the reverse osmosis water purification unit (ROWPU), it is necessary to set all chemical feed valves to "prime." This means that the valves should be opened to allow the chemicals to flow into the system and begin the purification process. This step is crucial for ensuring that the correct amount of chemicals is introduced into the system to achieve optimal water quality. Setting the valves to "off" would prevent any chemical feed, while "feed" would continuously introduce chemicals, and "standby" would imply that the system is not actively purifying the water.

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5. Which component in the shower facility are you not responsible to repair?

Explanation

The M-80 boiler is the component in the shower facility that you are not responsible to repair.

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6. What tests are taken utilizing the color comparator?

Explanation

The color comparator is used to test for chlorine and pH levels. This device allows for the comparison of color changes in a sample to determine the concentration of chlorine or the pH level. It is commonly used in water testing to ensure that the water is safe for consumption and to monitor its quality.

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7. What is the best way to protect hardwall piping from solar radiation?

Explanation

Burying piping is the best way to protect it from solar radiation because the soil acts as a natural insulator, preventing direct exposure to sunlight. This helps to maintain a consistent temperature and prevents the piping from overheating or degrading due to UV radiation. Additionally, burying the piping also protects it from physical damage and potential vandalism.

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8. What is provided with the Industrial operations and flightline extension subsystem to protect the water distribution system piping from damage?

Explanation

The Industrial 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, ensuring the integrity of the water distribution system and preventing leaks or breaks in the piping. Couplings, piping sleeves, and warning markers may have other functions or purposes, but they do not specifically protect the water distribution system piping from damage.

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9. Which color band designates reverse osmosis water purification unit piping that carries product water? 

Explanation

Blue is the correct answer because in the context of reverse osmosis water purification, blue color is commonly used to designate piping that carries product water. This color coding system helps to easily identify and differentiate between different types of piping in a water purification unit, ensuring that the product water is correctly routed and preventing any cross-contamination with other types of water or fluids.

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10. How often should you check the shower facilities pump assembly suction strainer for clogging?

Explanation

The shower facilities pump assembly suction strainer should be checked daily for clogging. This is important because a clogged strainer can restrict the flow of water and affect the performance of the pump. By checking it daily, any debris or blockages can be promptly removed, ensuring that the pump operates efficiently and the shower facilities function properly.

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11. Which expedient latrine is used if a prolonged deployment is planned?

Explanation

A deep pit latrine is the most suitable option for a prolonged deployment because it can hold a large amount of waste for an extended period of time. It is a simple and cost-effective solution that can be easily constructed and maintained. The deep pit allows for decomposition of the waste, reducing odor and the risk of contamination. Additionally, it minimizes the need for frequent emptying or relocation of the latrine, making it ideal for long-term use in remote or temporary locations.

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12. Repair of storm drains is time consuming because they:

Explanation

The correct answer is "are located underground." Storm drains are typically located underground, which makes their repair time-consuming. Accessing and repairing underground infrastructure involves more effort and time compared to aboveground structures. Additionally, underground storm drains may require excavation and specialized equipment to fix any issues, further contributing to the time-consuming nature of their repair.

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13. What type of valve is used to backwash the multimedia filter on the reverse osmosis water purification unit?

Explanation

The correct answer is Multiport. A multiport valve is used to backwash the multimedia filter on the reverse osmosis water purification unit. This type of valve allows for multiple ports or positions, which enables the flow of water to be redirected during the backwashing process. By using a multiport valve, the multimedia filter can be effectively cleaned and maintained, ensuring the proper functioning of the reverse osmosis water purification unit.

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14. At what point do you set the citric acid chemical feed valve back to the prime position?

Explanation

The correct answer is when the pH reads between 5-8. This is because citric acid is commonly used as a pH adjuster and buffer in various applications. In order to maintain the desired pH level, the citric acid chemical feed valve should be set back to the prime position when the pH reading falls within the range of 5-8. This ensures that the correct amount of citric acid is being added to maintain the desired pH level and prevent any potential issues that may arise from an imbalanced pH.

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15. Once initiated, when do you stop the reverse osmosis water purification unit reverse osmosis element cleaning procedure?

Explanation

The reverse osmosis water purification unit reverse osmosis element cleaning procedure should be stopped after 45 minutes has expired. This indicates that the cleaning process has been completed and continuing it further may not be necessary or may even be detrimental to the system.

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16. What should you do just before you loosen the eyebolts of the reverse osmosis water purification unit cartridge filter cover?

Explanation

Before loosening the eyebolts of the reverse osmosis water purification unit cartridge filter cover, it is important to mark the position of the cover. This is necessary to ensure that the cover is properly aligned and reinstalled in the correct position after maintenance or cleaning. By marking the position of the cover, it becomes easier to reassemble the unit accurately, preventing any potential issues or damage that may occur if the cover is not properly aligned.

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17. What effect does grease have on the electric kitchens evaporation beds?

Explanation

Grease slows down the evaporation process in electric kitchens' evaporation beds. This is because grease forms a layer on the surface of the water, creating a barrier that hinders the evaporation of water molecules. As a result, the presence of grease reduces the rate at which the water in the evaporation beds evaporates.

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18. When operating a boiler, what action will prevent the boiler from emitting heavy smoke from the exhaust stack?

Explanation

Opening the air band will allow more air to enter the boiler, creating a better air-to-fuel ratio. This will promote efficient combustion and prevent the formation of heavy smoke in the exhaust stack. Closing the air band would restrict the airflow, leading to incomplete combustion and increased smoke emissions. Increasing fuel pressure would result in a higher fuel flow rate, which could potentially lead to incomplete combustion and increased smoke. Decreasing fuel pressure would reduce the fuel flow rate, potentially causing insufficient combustion and increased smoke emissions.

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19. You should close a saddle trench expedient latrine when:

Explanation

When a saddle trench expedient latrine becomes filled with dirt to within 1 foot of the surface, it should be closed. This is because the latrine is nearing its capacity and continuing to use it could lead to overflow and unsanitary conditions. Closing the latrine at this point ensures that it is properly managed and prevents any further use that could pose health risks.

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20.  How many gallons per hour does the H–9518–2 reverse osmosis water purification unit produce (on average)? 

Explanation

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

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21. Where are the two deionization cartridges packed in the H–9518–2 model reverse osmosis water purification unit?

Explanation

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

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22. Which technical order do you use when operating the H–9581–2 reverse osmosis water purification unit?

Explanation

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23. What is the maximum reverse osmosis pump pressure that should never be exceeded when operating the reverse osmosis water purification unit?

Explanation

The maximum reverse osmosis pump pressure that should never be exceeded when operating the reverse osmosis water purification unit is 960 psi for seawater and 500 psi for brackish water.

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24. The chlorine residual of a Basic Expeditionary Airfield Resources water distribution system should never be lower than

Explanation

The correct answer is 1 part per million at the point of use. This means that the chlorine residual in the water distribution system should never be lower than 1 part per million when it reaches the point where it is being used by individuals. This is important to ensure that the water is properly disinfected and safe for consumption. The chlorine residual at the point of injection refers to the amount of chlorine added to the system, while the chlorine residual at the point of use is the amount remaining in the water after it has traveled through the distribution system.

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25. Approximately how long should it take a 3-person team to complete an in-crater repair on a 6- or 8-inch pipeline?

Explanation

The correct answer is 45 minutes because it is a reasonable amount of time for a 3-person team to complete a repair on a 6- or 8-inch pipeline in a crater. This time frame allows for the necessary tasks to be completed efficiently and effectively, ensuring that the repair is done properly. It strikes a balance between being too short, which may result in rushed or incomplete work, and being too long, which may indicate inefficiency or unnecessary delays.

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26. Which reverse osmosis water purification units are specifically designed for the US Air Force? 

Explanation

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27. Technically speaking, what physical impact does the choice of a clear water source have on the reverse osmosis water purification unit (ROWPU)?

Explanation

The choice of a clear water source for the reverse osmosis water purification unit (ROWPU) will result in less frequent backwashings. This is because a clear water source contains fewer impurities and contaminants that can clog the RO elements. With fewer clogs, the system will require less frequent backwashings to clean and maintain its efficiency.

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28. You must replace the reverse osmosis water purification unit reverse osmosis elements when the:

Explanation

When the citric acid feeding and both element cleaning methods are not effective, it indicates that the reverse osmosis water purification unit reverse osmosis elements are not being adequately cleaned and maintained. This can lead to a decrease in the efficiency and effectiveness of the purification process. Therefore, it is necessary to replace the elements to ensure the continued production of clean and purified water.

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29. How do you ensure that all the air has been released from the self-help laundry's water heater?

Explanation

To ensure that all the air has been released from the self-help laundry's water heater, you need to open the water heater relief valve until water appears. This is because the relief valve is designed to release any excess pressure or air that may have built up in the water heater. By opening the valve, any trapped air will be released and water will start flowing out, indicating that all the air has been purged from the system.

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30. What is the rated capacity of the positive displacement meter on the R–14C fuel servicing module?

Explanation

The rated capacity of the positive displacement meter on the R-14C fuel servicing module is 600 gpm.

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31. The canisters in the FFU–15E filter/separator are constructed of:

Explanation

The canisters in the FFU-15E filter/separator are constructed of aluminum. Aluminum is a lightweight and corrosion-resistant material, making it suitable for use in filter/separator canisters. Steel is a strong but heavy material, while bronze and copper are not commonly used for canister construction. Aluminum's properties make it the most suitable choice for the canisters in the FFU-15E filter/separator.

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32. Which color band designates reverse osmosis water purification unit piping that carries filtered water? 

Explanation

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

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33. How far away from the campsite should you set up the reverse osmosis water purification unit?

Explanation

Setting up the reverse osmosis water purification unit 100 feet upstream from the campsite is the correct answer because it ensures that the purified water is not contaminated by any potential pollutants or waste that may be present downstream. By locating the unit upstream, any impurities in the water will be filtered out before it reaches the campsite, providing clean and safe drinking water for the campers.

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34. If the pressure switch on the 35gpm electric pump is not operating properly, what is the first step you should take to correct the problem after de-energizing the unit?

Explanation

If the pressure switch on the 35gpm electric pump is not operating properly, the first step 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.

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35. What is the likely problem if a lift station pump is running backwards?

Explanation

If a lift station pump is running backwards, the likely problem is that the phase voltage is incorrect. Phase voltage refers to the voltage supplied to the motor's windings, and if it is incorrect, it can cause the motor to run in the opposite direction. This can happen due to incorrect wiring or a fault in the electrical system.

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36. Which medical facility is housed in a combination of tent expendable modular personnel and Alaskan tents?

Explanation

The Air Force theater hospital is the correct answer because it is the medical facility that is housed in a combination of tent expendable modular personnel and Alaskan tents. This type of facility is designed to be easily transportable and set up in various locations, making it suitable for deployment in theater settings.

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37. What must be considered when determining a convenient location to set-up the R–14C fuel servicing module?

Explanation

When determining a convenient location to set up the R-14C fuel servicing module, the type of aircraft to be serviced must be considered. This is important because different types of aircraft have different fuel requirements, such as fuel capacity and fueling equipment compatibility. Therefore, the location must be suitable for the specific aircraft that will be serviced to ensure efficient and safe fueling operations.

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38. What is the purpose of feeding citric acid into the reverse osmosis water purification unit (ROWPU) during the production run?

Explanation

Feeding citric acid into the reverse osmosis water purification unit (ROWPU) during the production run helps reduce scale build-up on the RO elements. Scale build-up can occur due to the presence of minerals and impurities in the water, which can negatively affect the efficiency and performance of the RO elements. Citric acid acts as a chelating agent, binding to these minerals and impurities and preventing them from forming scale on the RO elements. By reducing scale build-up, the ROWPU can operate more effectively and maintain a higher level of water purification.

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39. What is the initial setting of all the chemical pump control knobs on the reverse osmosis water purification unit?

Explanation

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

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40. What components make up the Basic Expeditionary Airfield Resources package macerator pump lift stations?

Explanation

The Basic Expeditionary Airfield Resources package macerator pump lift stations consist of a submersible macerator pump, a pump lift out assembly, and three floats.

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41. What is the highest allowed temperature of "mixed" water from the shower/shave pump assemblies' temperature regulator?

Explanation

The highest allowed temperature of "mixed" water from the shower/shave pump assemblies' temperature regulator is 115°F.

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42. The most common landfills on an installation are:

Explanation

The correct answer is trench and area. This means that the most common types of landfills found on an installation are trench and area landfills. Trench landfills involve excavating a trench and filling it with waste, while area landfills involve spreading waste over a designated area. Both types are commonly used for waste disposal on installations.

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43. When you expand water facilities, the capacity of any small dams and reservoirs you build should be capable of impounding at least the total:

Explanation

When expanding water facilities, it is important to ensure that the capacity of small dams and reservoirs is able to impound at least the total daily flow. This means that the capacity should be able to store the amount of water that flows in a single day. This is crucial in order to meet the water demand and ensure a steady supply of water for the intended purpose.

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44.  The movement of water through a permeable membrane from an area of lesser concentration to an area of higher concentration is called:

Explanation

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 of solutes on both sides of the membrane. Reverse osmosis, reverse filtration, and inverse pressure are not accurate terms for this specific process.

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45. What is the first step in assembling the shower facility after all the equipment has been unpacked?

Explanation

The first step in assembling the shower facility after all the equipment has been unpacked is connecting the drainage system. This is because the drainage system is essential for removing water and waste from the shower, ensuring proper functioning and hygiene. Connecting the drainage system should be prioritized before setting up the water supply manifolds, the framework of the shower, or connecting the water pump assembly.

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46. What should you do to prevent erosion of a completed landfill?

Explanation

Planting grass is an effective way to prevent erosion of a completed landfill because grass has a dense root system that helps to stabilize the soil and prevent it from being washed away by water or wind. The roots of the grass bind the soil particles together, reducing the risk of erosion. Additionally, the grass cover acts as a protective layer, reducing the impact of raindrops and preventing the soil from being exposed to erosion forces. Planting grass is a cost-effective and environmentally friendly solution to prevent erosion in landfills.

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47.  Unless otherwise directed by medical authorities, how many parts per million of chlorine residual must you keep in the product water produced by the reverse osmosis water purification unit? 

Explanation

The correct answer is 2. The question is asking about the minimum amount of chlorine residual that must be maintained in the product water produced by the reverse osmosis water purification unit. The answer is 2 parts per million, unless there are specific instructions or guidelines from medical authorities stating otherwise.

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48. The 500 follow-on subsystem is functionally identical to what other water distribution subsystem?

Explanation

The 500 follow-on subsystem is functionally identical to the 550 initial subsystem.

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49. During the initial run-up of the shower facility, what should you do if a showerhead continues to drip after the shower valve has been closed?

Explanation

It is normal for a showerhead to continue dripping for a short period after the shower valve has been closed. This is because there is residual water in the pipe that needs to drain out. There is no need to take any action or make any adjustments as this is a normal occurrence.

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50. Which bare-base medical facility provides outpatient clinic services?

Explanation

An air transportable clinic is a bare-base medical facility that provides outpatient clinic services. This type of facility is designed to be easily transported by air and can be set up quickly in remote or austere locations. It is equipped to provide basic medical care and treatment to patients who do not require hospitalization. The other options, such as the aeromedical staging facility, air transportable hospital, and contingency hospital, are not specifically designed to provide outpatient clinic services.

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51. In a dug well, the water flows into the casing from the:

Explanation

The water flows into the casing from the bottom in a dug well. This is because the well is dug into the ground, allowing water to seep in from the surrounding soil and collect at the bottom of the well. The casing, which is a protective structure around the well, allows the water to flow into it from the bottom.

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52. Sodium hex is fed by the reverse osmosis water purification unit chemical feed pump at the:

Explanation

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 introduced into the water at the point where it enters the multimedia filter.

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53. When afloat is not working properly in the dual pump lift station, and you have cleaned it and observed that it is not getting hung up in the lift station itself, what is your next course of action?

Explanation

If the float is not working properly even after cleaning and it is not getting stuck in the lift station, the next course of action would be to have an electrician check the float. This is because the issue might be with the electrical components of the float, such as the wiring or the contacts. An electrician would be able to diagnose and fix any electrical problems with the float, ensuring that it functions properly.

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54. How many washer and dryers are provided with the self-help laundry?

Explanation

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

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55. What technical order action do you follow to correct the self-help laundry's water heater if the water is too hot?

Explanation

To correct the self-help laundry's water heater if the water is too hot, the correct technical order action is to test and service the mixing valve. The mixing valve is responsible for controlling the temperature of the water by blending hot and cold water. By testing and servicing the mixing valve, any issues or malfunctions can be identified and repaired, ensuring that the water temperature is regulated properly.

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56. How is the temperature of delivered water primarily controlled in the shower/shave facility?

Explanation

The temperature of delivered water in the shower/shave facility is primarily controlled by a temperature regulator. This regulator adjusts the amount of cold supply water that is mixed in when the demand for hot water is increased or decreased. This ensures that the water temperature remains at the desired level.

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57. The area landfill construction method is used:

Explanation

The area landfill construction method is used where there is a high-water table. This is because a high-water table indicates that the groundwater level is close to the surface. In such areas, it is necessary to construct landfills that are designed to prevent contamination of the groundwater. The construction method used in these areas typically involves measures such as liners, leachate collection systems, and proper sealing to ensure that waste does not come into contact with the groundwater.

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58. What size mesh is the basket strainer that is installed upstream of the pump on the R–22 pumping unit?

Explanation

The correct answer is 60. This suggests that the mesh size of the basket strainer installed upstream of the pump on the R-22 pumping unit is 60. Mesh size refers to the number of openings per linear inch in a screen or filter. In this case, a mesh size of 60 indicates that there are 60 openings per linear inch in the basket strainer, which helps to filter out debris and prevent it from entering the pump.

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59. Which FORCE unit has a solar panel to charge the batteries during periods of extended inactivity?

Explanation

The R-20 servicing unit has a solar panel to charge the batteries during periods of extended inactivity. This feature allows the unit to remain operational even during periods of low activity or when it is not in use. The solar panel harnesses solar energy to charge the batteries, ensuring that the unit has a continuous power supply and can be readily used whenever needed.

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60. Under normal conditions, what are the proper parts per million and hours needed for chlorine to disinfect the Basic Expeditionary Airfield Resources water distribution system?

Explanation

The proper parts per million (ppm) of chlorine needed to disinfect the Basic Expeditionary Airfield Resources water distribution system under normal conditions is 10. Additionally, it requires 24 hours for the chlorine to effectively disinfect the system.

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61. After experiencing unusually long pump runs, how do you inspect the dual pump station's accumulator to determine if it has become waterlogged?

Explanation

To determine if the dual pump station's accumulator has become waterlogged after experiencing unusually long pump runs, you would depress the air valve. By depressing the air valve, any excess water in the accumulator will be released, indicating that it has become waterlogged. This action helps to restore the proper functioning of the accumulator and prevent any damage or inefficiency in the pump system.

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62. How much sand is required when a 20,000-gallon water bladder is placed on rocky or uneven surfaces?

Explanation

The 20,000-gallon water bladder needs 2 inches of sand when placed on rocky or uneven surfaces. This amount of sand is necessary to provide a stable and level base for the bladder, ensuring that it is properly supported and does not get damaged by the rough surface.

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63. How much water is required to prime the pump on the Basic Expeditionary Airfield Resources latrines deployable pump?

Explanation

The correct answer is 3 quarts. Priming a pump is the process of filling it with water in order to create suction and start the pumping action. In the case of the Basic Expeditionary Airfield Resources latrines deployable pump, it requires 3 quarts of water to prime the pump. This amount is sufficient to create the necessary suction and get the pump working effectively.

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64. Which technical order should you consult before operating the sewer sucker trailer?

Explanation

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65. The R–14 fuel servicing module is capable of delivering a controlled pressure of how much psi to the refueling nozzle?

Explanation

The R-14 fuel servicing module is designed to deliver a controlled pressure of 50 psi to the refueling nozzle, with a tolerance of plus or minus 5 psi. This means that the module can deliver a pressure as low as 45 psi or as high as 55 psi. This level of control ensures that the fuel is delivered at the correct pressure for efficient and safe refueling operations.

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66. What is the height of the dike wall around the 210,000 gallon collapsible coated fabric fuel tank?

Explanation

Based on the given information, the height of the dike wall around the 210,000 gallon collapsible coated fabric fuel tank is 6 feet.

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67. How many times can each end of the IPDS 19-foot aluminum main line pipe sections be regrooved?

Explanation

The correct answer is Once because regrooving refers to the process of cutting new grooves into the pipe section to accommodate different fittings or connections. Since the question states that the pipe sections can be regrooved, it means that each end of the IPDS 19-foot aluminum main line pipe sections can be regrooved only once.

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68. The FORCE R–18 pumping unit is powered by what?

Explanation

The FORCE R-18 pumping unit is powered by a multi-fuel engine. This means that it can run on various types of fuel, such as diesel, gasoline, or other compatible fuels. This versatility allows for flexibility in different operating conditions and fuel availability, making the pumping unit more adaptable and efficient.

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69. What is the capacity of the reverse osmosis water purification unit raw water pump? 

Explanation

The capacity of the reverse osmosis water purification unit raw water pump is 30.

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70. To operate the contingency fuel recovery system, at least how many people should be on the team?

Explanation

The contingency fuel recovery system requires a minimum of two people to operate effectively. Having two individuals on the team ensures that there is sufficient manpower to handle any unforeseen events or emergencies that may arise during the fuel recovery process. Additionally, having two people allows for better communication and coordination, enhancing the overall efficiency and safety of the operation.

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71. Cartridge filter replacement is indicated on the reverse osmosis water purification unit when the:

Explanation

When the differential pressure of the multimedia filter exceeds 20 psid, it indicates that the cartridge filter needs to be replaced in the reverse osmosis water purification unit. This means that there is a significant pressure difference between the influent and effluent sides of the multimedia filter, indicating that it is becoming clogged and not effectively filtering the water. Replacing the cartridge filter will ensure that the water continues to be properly purified.

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72. What occurs when the end connectors or the interconnectors of the reverse osmosis water purification unit get damaged by high pressure?

Explanation

When the end connectors or interconnectors of a reverse osmosis water purification unit get damaged by high pressure, osmosis occurs. Osmosis is the process by which solvent molecules pass through a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration, in this case, water molecules passing through the damaged connectors. This can lead to a decrease in the efficiency of the reverse osmosis unit and potentially affect the quality of the purified water.

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73. What is the maximum allowable height you can fill a 20,000-gallon water bladder?

Explanation

The maximum allowable height you can fill a 20,000-gallon water bladder is 64 inches. This means that the bladder can hold up to 20,000 gallons of water when filled up to a height of 64 inches.

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74. How many males and females does one field deployable latrine service?

Explanation

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75. Which reverse osmosis water purification unit pump is used to recirculate the citric acid solution during the reverse osmosis element cleaning procedure?

Explanation

The correct answer is "Backwash." During the reverse osmosis element cleaning procedure, the backwash pump is used to recirculate the citric acid solution. This pump helps to remove any accumulated debris or fouling on the reverse osmosis membrane, ensuring its optimal performance.

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76. How much fuel oil should you place in the burnout latrine prior to use?

Explanation

The correct answer is ½ gallon. This amount of fuel oil should be placed in the burnout latrine prior to use. This is likely the optimal amount needed to effectively burn waste and eliminate odors in the latrine.

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77. Which of these is not a reason to compact refuse and earth cover in a landfill?

Explanation

Compacting refuse and earth cover in a landfill helps to eliminate pests by reducing the availability of food and shelter for them. It also helps to eliminate odors by reducing the exposure of waste to the air. Additionally, compacting saves trench space by reducing the volume of waste, allowing more waste to be accommodated in a limited area. However, increasing settlement in the fill is not a reason for compacting. Settlement refers to the sinking or compression of the waste over time, and compacting does not directly influence this process.

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78. During night repair operations with the rapid utilities repair kit I, how close to a crater's edge can floodlight stands be positioned?

Explanation

Floodlight stands should not be positioned closer to a crater's edge than the height of the floodlight itself. This is to ensure the safety of the repair crew and prevent any accidents or damage to the equipment. Being too close to the edge could pose a risk of falling or instability, so maintaining a safe distance is important.

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79. How much working clearance must be maintained between the bladder and the bottom interior edge of the dike wall?

Explanation

A working clearance of 2' must be maintained between the bladder and the bottom interior edge of the dike wall. This clearance is necessary to ensure that there is enough space for any potential expansion or movement of the bladder without causing damage to the dike wall. It also allows for proper inspection and maintenance of the bladder and dike system.

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80. What is the maximum total dissolved solids (TDS) the factory-calibrated in-line TDS monitor can read?

Explanation

The maximum total dissolved solids (TDS) that the factory-calibrated in-line TDS monitor can read is 3,000.

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81. What component of the reverse osmosis water purification unit controls the backwash procedure?

Explanation

The backwash procedure in a reverse osmosis water purification unit is controlled by the backwash timer. This timer determines the duration and frequency of the backwash process, which is essential for maintaining the efficiency and effectiveness of the unit. The backwash timer ensures that the system is properly cleaned and any accumulated debris or contaminants are removed, allowing the unit to continue operating at optimal performance.

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82. What initial action drives the ocean intake wellpoint into the ocean floor?

Explanation

The correct answer is water pressure from the pump. When the pump is activated, it creates a suction force that draws water from the surrounding area, including the ocean floor. This water pressure pushes the ocean intake wellpoint into the ocean floor, allowing it to extract water efficiently.

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83. How many reverse osmosis water purification units (ROWPU) make up the 1500gph ROWPU water production subsystem?

Explanation

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

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84. How much slope should the dike floor have that contains a 10K-gallon fuel bladder?

Explanation

The dike floor should have a slope of 1 degree in order to contain a 10K-gallon fuel bladder. This slope is necessary to ensure that any spills or leaks will flow towards a designated collection point, preventing the fuel from spreading and causing potential hazards. A slope of 1 degree is sufficient to allow for proper drainage without causing excessive runoff or difficulty in maneuvering within the dike.

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85. To prevent the growth of rooted aquatic plants, how many feet is the minimum depth of an oxidation pond?

Explanation

The minimum depth of an oxidation pond should be 2 feet to prevent the growth of rooted aquatic plants. This depth is necessary to create an environment where sunlight cannot reach the bottom of the pond, inhibiting the growth of plants that require sunlight for photosynthesis. By keeping the depth at 2 feet or more, the pond can effectively control the growth of rooted aquatic plants and maintain a healthy ecosystem.

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86. How many inches of earth should you apply to the daily waste in an area landfill?

Explanation

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87. The hydraulic hoses that operate the submersible pump are pressurized to approximately what psi?

Explanation

The hydraulic hoses that operate the submersible pump are pressurized to approximately 3000 psi.

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88. What is the safe fill height of the bladder when it is full?

Explanation

The safe fill height of the bladder when it is full is 4 feet. This means that the bladder can safely hold and contain its maximum capacity of liquid up to a height of 4 feet. Going beyond this height may pose a risk of overfilling and potentially damaging the bladder or causing spillage. Therefore, it is important to adhere to the recommended safe fill height of 4 feet to ensure the bladder functions properly and avoids any potential hazards.

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89. From top to bottom, what are the contents of a urine soakage pit?

Explanation

The correct answer is fine gravel, small stones, and large stones. This is because urine soakage pits are designed to allow urine to percolate into the ground while preventing solids from clogging the pit. The layers of fine gravel, small stones, and large stones help to filter the urine and create a drainage system that allows for proper absorption into the soil. The larger stones at the bottom provide stability and prevent the pit from collapsing.

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90. What is the purpose of the float valve on the R–22's fuel tank?

Explanation

The purpose of the float valve on the R-22's fuel tank is to fill the engine tank. The float valve helps regulate the flow of fuel into the engine tank, ensuring that it is filled to the appropriate level for optimal engine performance.

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91. The sealing clamps used for emergency repair of collapsible coated fabric fuel tanks come in which three sizes?

Explanation

The sealing clamps used for emergency repair of collapsible coated fabric fuel tanks come in three sizes: 3-inch, 5-inch, and 7–1/2-inch.

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92. What is the maximum discharge pressure the R–22 pump assembly was designed to deliver at 600 GPM?

Explanation

The R-22 pump assembly was designed to deliver a maximum discharge pressure of 85 psi at a flow rate of 600 GPM. This means that the pump is capable of generating enough pressure to push the fluid through the system at a rate of 600 gallons per minute, without exceeding a pressure of 85 psi.

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93. How many filter elements are installed on the PMU–27M filter separator?

Explanation

There are 3 filter elements installed on the PMU-27M filter separator.

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94. In which order do the high-pressure safety devices on the WPES–20 reverse osmosis water purification unit activate?

Explanation

not-available-via-ai

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95. The Hammonds TPI–4T–4 additive injector is operated by:

Explanation

The correct answer is pneumatic pressure. This means that the Hammonds TPI-4T-4 additive injector is operated using air pressure. It does not rely on an electric motor or DC battery power to function. Instead, it uses the force of the air pressure to inject the additive into the system. The fuel flowing through the injector does not directly operate it.

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96. Because of the inland petroleum distribution system's (IPDS) single grooves on the pipe sections and equipment adapters, what is the maximum allowable operating pressure the IPDS the system can withstand?

Explanation

The IPDS system can withstand a maximum operating pressure of 740psi. This is likely due to the design of the system, specifically the single grooves on the pipe sections and equipment adapters. These features may provide additional strength and stability, allowing the system to handle higher pressures without failure.

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97. Depth should be three times greater than the length?

Explanation

The correct answer is "depth should be twice the length". This means that the depth of an object should be two times greater than its length. In other words, if the length of an object is x units, then its depth should be 2x units. This ensures that the depth is proportionally larger than the length.

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98. How many males and females does one field-deployable latrine service?

Explanation

One field-deployable latrine service can accommodate 50 males and 22 females.

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