CDC 3e251 Set B Vol. 3

All of the materials mentioned, sod, clay, and soil-cement, can be used to prevent berm erosion. Sod is a layer of grass and soil that can stabilize the berm and prevent erosion. Clay is a compactable material that can be used to build up the berm and create a barrier against erosion. Soil-cement is a mixture of soil, cement, and water that can be used to create a hard, durable surface on the berm, preventing erosion. Therefore, all of these materials are effective in preventing berm erosion.

An oxyacetylene welding system requires all parts to be in good condition in order to function properly and safely. Even a single damaged part can compromise the effectiveness of the system and potentially lead to accidents or malfunctions. Therefore, it is not possible to have any damaged parts and still be able to use the system.

An oxyacetylene welding system requires all its parts to be in good condition in order to function properly. Any damaged part can compromise the safety and effectiveness of the system. Therefore, having even one damaged part would make it impossible to use the system. Hence, the correct answer is 0.

A sanitary landfill should not be located near a spring because springs are natural sources of water that emerge from the ground. If a landfill is situated near a spring, there is a high risk of contamination. The pollutants and toxins from the landfill can seep into the groundwater, which can then flow into the spring, contaminating the water source. This can have detrimental effects on the environment and public health, as the contaminated water can be used for drinking, irrigation, and other purposes. Therefore, it is crucial to avoid locating a landfill near a spring to protect the integrity and safety of the water source.

The first thing to assemble on the temper tent is the tent frame. This is because the tent frame provides the structure and support for the entire tent. Once the frame is assembled, the other components such as the window sections, end sections, and the fly can be attached to complete the assembly of the temper tent.

Concertainer revetments are structures used for erosion control and flood protection. They are made up of wire mesh baskets filled with soil or other materials. A geofabric liner is a suitable choice for lining these revetments because it is a permeable material that allows water to pass through while retaining the soil inside the baskets. This prevents erosion and provides stability to the revetments. Geofabric liners are also durable and resistant to degradation, making them an ideal option for long-term protection against erosion and flooding.

Revetments are structures built to protect parked aircraft and essential facilities. They act as a barrier against potential damage caused by natural disasters, such as floods or high winds, as well as protect against potential attacks. By providing a physical barrier, revetments ensure the safety and security of parked aircraft and essential facilities, minimizing the risk of damage and ensuring their operational readiness.

Concertainer revetments are structures made of wire mesh containers filled with soil or other materials to prevent erosion or provide protection against floods. These containers are held together using connecting pins, which secure the adjacent units and maintain the overall stability of the revetment system. Rebar, zip strips, and angle irons are not typically used for this purpose.

Before lighting the cutting torch of an oxyacetylene outfit, it is crucial to check the entire outfit for gas leaks. This is important to ensure the safety of the operator and prevent any potential accidents or hazards that may arise from leaking gas. By checking for gas leaks, any potential issues can be identified and addressed before the torch is ignited, minimizing the risk of fire or explosion.

In order to effectively respond to an enemy attack, it is important to divide and disperse the RRR assets to separate areas. By doing so, the assets are distributed in different locations, making it harder for the enemy to target and neutralize them all at once. This strategy also ensures that the assets are readily available and accessible in multiple areas, allowing for a more efficient and coordinated response to the attack.

The sides and cross panels of the A-1 and B-1 revetments are held together with pins. This means that the different components of the revetments are joined and secured using pins, which provide stability and strength to the structure.

Before using any material on a DoD airfield, it is necessary to ensure that it is certified for use. This certification ensures that the material meets the required standards and specifications for safety and performance on the airfield. Certification is important to maintain the integrity and functionality of the airfield, as using uncertified materials could pose risks and potentially compromise the operations and safety of aircraft.

During freezing weather, the water in the soil can freeze, causing the soil to expand and potentially crack or break apart. This can lead to a weakened road structure and result in potholes or other damage. Therefore, it is best to restrict the construction of a soil-cement road during freezing weather to ensure its durability and longevity.

Before attaching regulators, it is necessary to crack open each cylinder outlet valve to blow out any dirt that may be lodged in the outlet nipple. This is important because if there is any dirt or debris present, it can potentially clog the regulators or cause damage to the equipment. By cracking open the cylinder outlet valve, any dirt or debris can be expelled, ensuring proper functioning of the regulators and preventing any potential issues or blockages.

When closing down an Oxyacetylene unit, it is important to close the oxygen torch valves first. This is because oxygen supports combustion and is highly flammable, so shutting off the oxygen supply first ensures that any potential fire or explosion risks are minimized. By closing the oxygen torch valves before any other valves, the flow of oxygen is stopped, reducing the chances of accidents or hazards occurring during the shutdown process.

A pure acetylene flame is smoky because there is not enough oxygen in the air to burn the acetylene completely. Incomplete combustion occurs when there is insufficient oxygen available for the reaction, resulting in the production of soot and smoke. Acetylene requires a specific ratio of oxygen to burn cleanly and efficiently. When this ratio is not met, carbon particles are formed, leading to the smoky flame.

Beckets are strong loops or handles that are used to join or secure different sections of the temper tents together. They provide a secure and reliable connection between the sections, ensuring that the tent remains stable and intact. Snaps, zippers, and buttons are not typically used for joining tent sections together as they may not provide the same level of strength and stability as beckets.

The Crater NCOIC is responsible for determining how much fill is needed at the crater repair sites. As the Non-Commissioned Officer in Charge, they have the authority and expertise to assess the extent of the damage and calculate the amount of fill required for proper repair. They oversee the operations and make informed decisions regarding the quantity of fill needed to effectively restore the crater site.

The slot made during the oxyacetylene cutting is called the "kerf". The term "kerf" refers to the width of the cut made by a saw or other cutting tool. In the context of oxyacetylene cutting, the kerf represents the width of the groove or slot created by the process.

After constructing a lagoon, one of the first things to do is to secure the area with fencing. This is important to prevent unauthorized access and ensure safety. Fencing helps to keep people and animals away from the lagoon, reducing the risk of accidents or contamination. It also serves as a boundary marker, clearly defining the area and indicating that it is a restricted zone. By securing the area with fencing, potential hazards can be minimized, and the lagoon can be properly protected and maintained.

Oxyacetylene cutting can be done without any special precautions on all low and medium carbon steels because these materials have lower carbon content, which makes them less prone to cracking or distortion during the cutting process. Additionally, the high heat generated by the oxyacetylene flame is effective in cutting through these types of steels. However, special precautions may be necessary when cutting other materials such as cast iron, aluminum, and stainless steel due to their different properties and potential challenges during the cutting process.

The Small Shelter System is the newest all-purpose tent type shelter used by the Air Force. This implies that the other options mentioned, such as the Temper Tent system, GP Medium system tent, and GP Large system tent, are not as recent or commonly used by the Air Force.

Dividing the coil-cement road area into sections allows for easier management and completion of each section within a single working day. By breaking down the area, the workers can focus on one section at a time, ensuring that it is properly finished before moving on to the next section. This approach helps in efficient utilization of time and resources, allowing for timely completion of the entire area.

Copper must never be used on an acetylene hose because it forms an unstable compound with acetylene. This is because acetylene can react with copper to form copper acetylide, which is highly explosive and can cause serious accidents. Therefore, it is important to avoid using copper in any part of the acetylene hose system to ensure safety.

The acronym MOS stands for Minimum Operating Strip. This refers to the minimum distance required for an aircraft to safely take off or land on a runway. It takes into account various factors such as the aircraft's weight, speed, and runway conditions to ensure a safe operation.

Cold-mix asphalt is considered the quickest method for repairing spalls, but it has limited success. This is because cold-mix asphalt is a temporary solution that is not as durable or long-lasting as other methods. It is often used as a temporary fix until a more permanent solution can be implemented.

An above ground level fuel bladder berm is least desirable because it poses a higher risk of leakage or rupture, leading to potential fuel spills and environmental contamination. Being above ground level makes it more susceptible to damage from external factors such as weather conditions, accidental impacts, or vandalism. Additionally, an above ground level berm may require additional safety measures and maintenance to prevent any potential hazards. Therefore, it is considered the least desirable option compared to the other choices provided.

After you receive an "All clear," you are allowed to disperse RRR equipment to designated staging areas situated around the runway. This means that once it has been confirmed that there is no longer a threat or danger present, you can proceed with the distribution of the equipment. It is important to ensure the safety of the area and personnel before initiating any dispersal activities.

A grader is used to clear an area where AM-2 mats are to be assembled. A grader is a heavy equipment machine that is commonly used in construction and road maintenance projects. It is equipped with a long blade that is used to level and smooth the surface of the ground, making it suitable for the assembly of AM-2 mats. The blade can be adjusted to different angles and depths to remove any obstacles or unevenness in the area, ensuring a flat and stable surface for the mats to be placed on.

The best way to repair damage to a large section of revetment is to remove the damaged section. This is because removing the damaged section allows for a clean and effective repair. By removing the damaged section, it ensures that there are no weak points or compromised areas left in the revetment. Additionally, removing the damaged section allows for a proper assessment of the extent of the damage, which can help determine if any other repairs or reinforcements are needed.

Placing sandbags, canvas, or burlap sacks around a metal planking culvert helps to give the culvert a better water-tight seal. By filling the voids around the culvert with these materials, it prevents water from seeping through and ensures that the culvert remains watertight. This additional layer acts as a barrier, reducing the risk of water leakage and improving the overall integrity of the culvert.

The Small Shelter System Tent electric cable assemblies should be inspected every 30 days. This regular inspection ensures that the cables are in good condition and functioning properly. By inspecting them at this frequency, any potential issues or damage can be identified and addressed promptly, reducing the risk of electrical hazards or malfunctions.

The most important consideration when constructing a timber bridge is to ensure that it is constructed according to its projected use. This means that the bridge should be designed and built to meet the specific requirements and demands of its intended purpose. Factors such as the expected traffic volume, the weight of the loads it will carry, and the environmental conditions it will be exposed to should all be taken into account during the construction process to ensure that the bridge is safe, durable, and efficient.

Beveling is considered one of the more difficult torch cutting techniques to accomplish. This technique involves cutting at an angle or creating a beveled edge on the material being cut. It requires precise control and coordination to maintain the desired angle and produce a clean and accurate cut. Beveling requires a higher level of skill and experience compared to straight-line cutting, circle cutting, or piercing, making it more challenging to execute correctly.

When cleaning a tip, using a straight, back and forth cleaning motion helps to prevent enlarging the orifice. This is because a straight motion ensures that the cleaning tool is evenly distributed across the tip, minimizing the chances of accidentally widening the orifice. By avoiding any irregular or circular motions, the risk of enlarging the orifice and potentially affecting the performance of the tip is reduced.

White paint with reflective beads is the correct answer because it provides high visibility and contrast against most backgrounds, making it easier to mark and identify the Military Occupational Specialty (MOS) areas. The reflective beads enhance visibility during low light conditions or when headlights shine on the markings. Black paint would not provide sufficient contrast, while orange and yellow paints may not stand out as effectively against certain backgrounds. Therefore, white paint with reflective beads is the most suitable material for expedient marking of the MOS.

The starter keylock allows 2 AM-2 mat laying teams to start work in the middle of a runway and work in opposite directions towards the ends of the runway. It is specifically designed to facilitate the starting point for the teams and allows them to work efficiently in opposite directions. The keylock ensures a smooth and coordinated workflow for the mat laying teams.

A concertainer revetment is a type of protective structure made from wire mesh containers filled with soil or other materials. Erecting a concertainer revetment typically involves lifting and placing the containers in a specific arrangement. While it is possible for one person to lift and place the containers, it is generally more efficient and safer to have at least two people working together. One person can hold and guide the container while the other person provides support and helps with the lifting. Therefore, the minimum amount of people required to erect a concertainer revetment is 2.

Stones that weigh less than 10 pounds are placed in the lower center of the berm during construction. This placement helps to provide stability and support to the berm, as the heavier stones are typically placed on the top for added weight and strength. Placing the lighter stones in the lower center ensures that they still contribute to the overall stability of the berm, while also allowing for proper weight distribution.

When repairing a damaged utility located in a bomb crater, the first action to take is to isolate the utility. This means disconnecting it from any power sources or systems to ensure the safety of the repair crew and prevent further damage. By isolating the utility, it can be safely assessed and repaired without any risk of electrical or other hazards. This step is crucial in prioritizing the safety and effectiveness of the repair process.

The correct answer is "After you remove all internal components." This means that the single ply floor should be removed after all the internal components of the temper tent have been taken out. Removing the floor at this stage ensures that it doesn't get damaged or hinder the disassembly process.

Acetone is used inside acetylene cylinders to stabilize the pressurized acetylene. Acetone acts as a solvent and helps to keep the acetylene in a stable state, preventing it from decomposing or becoming explosive. It helps to maintain the pressure inside the cylinder and ensures the safe storage and transportation of acetylene.

The safety feature of oxyacetylene equipment is that acetylene connections have left hand threads and oxygen connections have right hand threads. This is important because it prevents accidental interchange of the two gases, as the left hand threads on the acetylene connections are not compatible with the right hand threads on the oxygen connections. This ensures that the gases are always connected correctly, reducing the risk of explosions or other hazards.

When abandoning a sanitary landfill trench, it is recommended to cover it with at least 2 feet of material. This is necessary to prevent the exposure of waste and to control odors, vectors, and potential contamination of groundwater. A thicker layer of covering material helps to ensure the proper containment and isolation of the waste, minimizing any potential environmental impacts.

Sustainment is the correct answer because when we want to upgrade expedient repairs, we need a type of crater repair that is long-lasting and can provide ongoing support. Sustainment repairs are designed to maintain and enhance the functionality and durability of the repaired area over an extended period of time. This type of repair ensures that the repaired crater remains in good condition and can withstand the demands of regular use.

The correct answer states that Bitburg and concrete bins are the two types of concrete revetments replacing A-1 and B-1 revetments. This implies that the previous revetments, A-1 and B-1, are being replaced by Bitburg and concrete bins.

A lean-to is considered to be a quick and easily constructed temporary culvert. A lean-to is a simple shelter made by leaning one side of a roof against a wall or tree, providing a sloping roof that can redirect water flow. It can be easily constructed using available materials such as branches, leaves, and tarpaulin. This temporary culvert can be quickly assembled in emergency situations to divert water and prevent flooding.

The Small Shelter System tent is designed to withstand wind loads of 50 knots. This means that it is capable of withstanding a strong wind speed of 50 knots without being damaged or collapsing. The tent is built with materials and construction techniques that make it sturdy and resistant to high winds, providing a safe and secure shelter even in challenging weather conditions.

When lighting an oxyacetylene torch, it is important to open the acetylene valve first. This is because acetylene is a flammable gas and should be ignited first before introducing oxygen. By opening the acetylene valve first, you can create a small flame that can be adjusted to the desired size. Once the acetylene flame is established, the oxygen valve can be gradually opened to achieve the desired flame intensity.

Opening the drain would allow the fuel to flow out of the berm, preventing it from burning. By removing the fuel, there would be no source for the fire to continue burning. This action would help to minimize the risk of the fire spreading and causing further damage.