2A654 CDC All UREs (100 Questions)

A T-handle torque wrench is a tool used to tighten bolts or nuts to a specific torque value. The feature of having a preset torque means that the wrench is designed to automatically stop applying force when the desired torque level is reached. This ensures that the fastener is tightened to the correct specification, preventing over-tightening or under-tightening. This feature is particularly useful in applications where precision and accuracy are crucial, such as in automotive or mechanical engineering industries.

The correct answer is "tack-free time." Tack-free time refers to the duration it takes for sealant to cure completely, to the point where it will not stick to a plastic film. This is the time at which the sealant has dried sufficiently and is no longer tacky or sticky. The other options, such as application time, cure time, and drying time, may refer to different stages or aspects of the sealant's curing process, but they do not specifically indicate the point at which it becomes non-sticky.

The correct answer is Operational, air base, and specialized mission. These are the three types of wings in the given context. Operational wings refer to the wings that are responsible for carrying out day-to-day operations and missions. Air base wings are responsible for providing support and services to the air base and its personnel. Specialized mission wings are focused on specific missions or tasks assigned to them.

Providing an air escape is the step that will protect the structure when using a high power injection gun. This is because when injecting a high power substance into a structure, air can become trapped and cause pressure build-up, potentially damaging the structure. By providing an air escape, the trapped air can be released, preventing any potential damage to the structure.

The most important factor in isolating a fuel cell leak is having knowledge of the fuel cell and cavity system. This implies that understanding how the fuel cell is constructed and how it functions is crucial in identifying and addressing any potential leaks. By having a comprehensive understanding of the fuel cell and cavity system, one can effectively locate and isolate the source of the leak, allowing for appropriate repair procedures to be carried out. The other options, such as construction of a cross-sectional view, size of the fuel leak, and whether or not the cell is a bladder type, may be relevant factors but are not as critical as having knowledge of the fuel cell and cavity system.

The correct answer is "there are no potential safety hazards." This is because before performing maintenance, it is crucial to review the AFTO 781's to ensure that there are no potential safety hazards present. This step is essential to maintain the safety of the personnel involved in the maintenance process and to prevent any accidents or incidents that could occur due to safety hazards. Checking for open fuel tanks, open discrepancies, and air pressure in the tires are also important steps, but they are not directly related to ensuring safety hazards are absent.

The surge box, when combined with ejector pumps, helps to keep the boost pump inlet submerged in fuel at all times. The surge box is a component that helps regulate the flow of fuel and prevents any surges or fluctuations in fuel pressure. By maintaining a consistent level of fuel around the boost pump inlet, it ensures that the pump can function properly and prevents any air from entering the system.

A cannon plug is a component designed to quickly connect and disconnect wires. It simplifies the installation of a shutoff valve by providing a secure and efficient connection between the wires. This allows for easy installation and removal of the valve, saving time and effort in the process.

The letters I, O, and Q are not used to label the pins on a cannon plug. This is likely because these letters can be easily confused with other letters or numbers, such as 1 or 0. To avoid any confusion or misinterpretation, these letters are omitted from the labeling system.

Eye bolts are used in fuel cell cavities and serve as attachment points for fuel cells because they have a looped end that allows for easy attachment of hooks, cables, or other devices. This looped end provides a secure and reliable connection, making eye bolts ideal for securing fuel cells in place.

A feature of a hi-lok type fastener is that it can be installed with hand tools. This means that specialized equipment or machinery is not required to install or remove the fastener, making it convenient and accessible for use.

The one-part sealant injection gun is specifically designed to inject sealant into channels and under wing skin. This indicates that it is used for sealing purposes in these areas, ensuring that they are properly sealed and protected. It is not used for loose rivet holes, prepacks, or voids inside the tank, as these require different methods or tools for sealing.

Rubber buckets must be emptied after use to prevent a safety or spill hazard. Leaving the buckets filled with any substance can create a risk of accidents or spills, which can lead to injuries or property damage. Therefore, it is important to empty the buckets to maintain safety and prevent any potential hazards.

A climate control unit is installed in hangers used for curing sealant and purging. This system helps regulate and maintain the temperature, humidity, and airflow within the hangers. It ensures that the optimal conditions are maintained for the curing process of the sealant and the purging of any contaminants. An air conditioner may only provide cooling, while a climate control unit offers a more comprehensive solution to create the desired environment. Rhine air fan and new generation heater are not specifically designed for controlling the climate in hangers.

Before the structural support members of an integral fuel tank are removed, it is important to ensure that the stress load has been removed. This is because the structural support members bear the weight and pressure of the fuel tank, and removing them without relieving the stress load could lead to structural failure or damage. Therefore, it is necessary to remove the stress load before proceeding with the removal of the support members to ensure safety and prevent any potential accidents or damages.

After finding the exact leak exit point, the next step prior to repairing the fuel leak is to find the leak source. This is important because identifying the source of the leak will help determine the extent of the damage and the appropriate repair method. It will also prevent any further damage from occurring and ensure that the repair is done effectively.

When you clear a discrepancy in AFTO 781, the last name initial will be placed over the symbol. This indicates that the discrepancy has been resolved and the responsible individual has acknowledged and taken ownership of the action. The last name initial serves as a signature and helps identify who has cleared the discrepancy.

Excessive fuel vapor inhalation can lead to a condition known as gasoline intoxication, which affects the central nervous system. This can cause muscular uncoordination, also known as ataxia, as one of the symptoms. The inhalation of fuel vapor can impair motor skills and coordination, making it difficult for a person to control their movements and perform tasks that require fine motor skills.

After using a sealant fillet gun, it is necessary to clean off any remaining sealant from the gun. This is important to prevent the sealant from drying and clogging the gun, which could affect its performance and make it difficult to use in the future. Cleaning off the residual sealant ensures that the gun remains in good working condition and ready for future use.

The entry authority should maintain the canceled entry permit for a year after task completion. This is important for record-keeping purposes and to ensure that there is a documented history of the entry permit being canceled. By maintaining the permit, the entry authority can easily access it if needed for any future reference or audits. This practice helps in maintaining transparency and accountability in the entry permit process.

The purpose of the stringers in an integral fuel tank is to provide attachment points for the skin. Stringers are longitudinal structural members that run parallel to the fuselage or wing and are attached to the skin. They help distribute loads and provide additional strength and rigidity to the structure. In the case of an integral fuel tank, the stringers serve as attachment points for the outer skin of the tank, ensuring it remains securely in place and can withstand the forces and stresses during flight.

A loose interconnect fitting in a fuel cell can result in a fast and severe type of fuel cell leak. When the interconnect fitting is not securely tightened, it can cause a gap or opening in the fuel cell system, allowing fuel to escape rapidly. This can lead to a significant loss of fuel and potential damage to the fuel cell components. Therefore, a loose interconnect fitting is likely to result in a fast and severe type of fuel cell leak.

Corner repairs are best performed at depot or contractor facilities because they require specialized equipment and expertise. These repairs involve fixing damage to the corners of a cell, which can be complex and require precise techniques. Depot or contractor facilities are equipped with the necessary tools and trained personnel to handle these repairs effectively. Additionally, performing corner repairs in a controlled environment ensures that the repairs are done correctly and meet the required standards.

Respirators stored for emergency or rescue purposes must be inspected on a monthly basis. This regular inspection ensures that the respirators are in good working condition and ready to be used in case of an emergency. Monthly inspections allow for any potential issues or damages to be identified and addressed promptly, reducing the risk of malfunction or failure when the respirators are needed. Regular inspections also help to maintain compliance with safety regulations and standards.

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Category 1 deficiency reports must be submitted within 24 hours. This means that any reports regarding critical issues or problems that could potentially cause harm or major disruptions should be reported within a 24-hour timeframe. This ensures that urgent matters are addressed promptly and appropriate actions can be taken to resolve them in a timely manner.

The correct answer is 115VAC ISO BUS. This marking indicates that the circuit breaker is protecting an AC circuit from the isolated bus at 115 volts. The "115VAC" specifies the voltage of the circuit being protected, and the "ISO BUS" indicates that the circuit is isolated from other circuits.

The correct answer is 40 to 200°F. This means that the operating temperature range of the HDU-13/M heater is between 40 and 200 degrees Fahrenheit. This range indicates the minimum and maximum temperatures at which the heater can effectively function. Operating the heater below 40°F or above 200°F may result in inefficient or unsafe operation.

Maintenance stands used specifically for fuel system maintenance should be equipped with static discharge plates. Static discharge plates are essential to prevent the buildup of static electricity, which can be dangerous when working with fuel systems. These plates provide a path for the static electricity to safely discharge, reducing the risk of sparks or potential fires. Handrail steps and wheel locks may be important for general safety and stability, but they are not directly related to fuel system maintenance. Bonding wire reels are also not necessary for static discharge in this context.

The hollow bolt dye injector method should be used to isolate a leak source in an integral fuel tank when the double cup assembly was unsuccessful. This suggests that the double cup assembly method was attempted but did not successfully identify or fix the leak. In such cases, the hollow bolt dye injector method is a suitable alternative to locate and isolate the source of the leak.

The initials of a certifying official are required only for core tasks listed on the STS. This means that tasks which are essential and fundamental to the operation or function being performed are the ones that require the initials of a certifying official in the last column of the STS. Tasks that are not considered core or essential do not require the initials of a certifying official.

A flight preparedness check is known as a pre-flight inspection. This inspection is conducted before a flight to ensure that the aircraft is in proper condition and all necessary preparations have been made. It involves checking various systems, equipment, and documentation to ensure that everything is in order and ready for the upcoming flight. The other options mentioned, such as end-of-runway, thru-flight, and hourly post-flight inspections, are not specifically related to flight preparedness checks.

The correct answer is Two. This implies that only 2% of all accidents are caused by natural causes.

Unsafe acts and conditions can be considered a direct cause of any accident. When individuals engage in unsafe behaviors or are exposed to hazardous conditions, the likelihood of an accident occurring increases. Unsafe acts can include actions such as not wearing protective equipment, operating equipment without proper training, or disregarding safety protocols. Unsafe conditions can involve factors like faulty equipment, inadequate lighting, or cluttered workspaces. These factors contribute directly to accidents by creating an environment where the risk of harm is heightened. Therefore, unsafe acts and conditions are a significant factor in causing accidents.

The correct answer is "metal, stone, misc." This answer correctly identifies the three general classes of FOD (Foreign Object Debris) as metal, stone, and miscellaneous. Metal and stone are common types of debris that can cause damage to aircraft engines or other components if not properly managed. The miscellaneous category encompasses any other types of debris that may pose a risk, such as plastic, rubber, or wood. By categorizing FOD into these three classes, it helps in identifying and mitigating potential hazards on airport runways or other areas where FOD can accumulate.

Troubleshooting is the type of O&M TO that enables you to isolate a malfunctioning component. Troubleshooting involves the process of identifying and resolving problems or issues within a system. It typically includes a systematic approach of diagnosing the problem, identifying the root cause, and finding a solution. By using troubleshooting techniques, technicians can isolate and identify the specific component that is causing the malfunction, allowing for targeted repairs or replacements to be made.

The correct answer is that the landing gear must be in the airborne position. This safety feature ensures that the fuel jettison system is only activated when the aircraft is in the air, preventing accidental loss of fuel while on the ground. By requiring the landing gear to be in the airborne position, it ensures that the system is not inadvertently activated during ground operations, reducing the risk of fuel loss and potential hazards.

Operating a pneumatic power tool at a pressure higher than the specified limit can cause the tool to explode and result in injury. This is because the excess pressure can cause the components of the tool to fail, leading to a sudden release of energy that can cause an explosion. It is important to always operate pneumatic power tools within their recommended pressure range to ensure safe and proper functioning.

The correct answer is the lower wing surface. This is because the lower wing surface is located outside of the aircraft and is therefore considered an external fuel leak location. Flats, slats, and vented dry bays are all internal components of the aircraft and would not be considered external fuel leak locations.

The maintenance group commander is responsible for ensuring that there is an orientation program developed for all newly assigned personnel. This is because the maintenance group commander oversees the maintenance operations and personnel within the organization and is in a position to ensure that new employees receive the necessary training and orientation to perform their duties effectively.

Thru-flight inspection is applicable to aircraft conducting an immediate turnaround. This type of inspection is conducted when the aircraft has landed and is preparing for its next flight. It involves a quick inspection of the aircraft's systems, components, and exterior to ensure that everything is in proper working order and there are no visible signs of damage or issues that could affect the safety of the upcoming flight. Thru-flight inspections are typically performed by the flight crew or ground personnel and are focused on identifying any immediate concerns that need to be addressed before the aircraft can depart again.

The jettison mast is a component of the fuel transfer system in a cargo aircraft. Its purpose is to allow the aircraft to jettison or release fuel in emergency situations. To prevent foreign objects from entering the fuel transfer system through the jettison mast, a flame arrester screen is installed. This screen acts as a barrier, allowing fuel to pass through while preventing any foreign objects or flames from entering the system. This helps maintain the safety and integrity of the fuel transfer process.

If the boom travel limits are exceeded during aerial refueling on a bomber aircraft, it will result in an automatic disconnect of the boom and receptacle. This is because exceeding the boom travel limits can potentially cause damage to the equipment or compromise the safety of the refueling operation. Therefore, to prevent any further risks or accidents, the system automatically disconnects the boom and receptacle.

If the boost pump inlet screen is clogged, it will restrict the flow of fuel into the ejector pumps, causing them to not operate at full efficiency. The boost pump is responsible for supplying fuel to the ejector pumps, so if its inlet screen is blocked, it will result in reduced fuel flow and decreased efficiency of the ejector pumps.

Rough handling of the valve could result in a malfunction in a fuel vent float valve. When the valve is roughly handled, it can cause damage to its internal components or misalign them, leading to improper functioning. This can disrupt the flow of fuel or cause leakage, ultimately resulting in a malfunction. Therefore, it is important to handle the valve with care to ensure its proper operation.

The total digital readout displays the total fuel on the aircraft in all positions except "TEST." This means that when the fuel quantity select switch is set to "TEST," the total fuel on the aircraft is not shown on the digital readout. The purpose of the "TEST" position is likely to perform a diagnostic or calibration test on the fuel system, rather than displaying the actual fuel quantity.

The unit of measurement for the opposition to current flow is Ohm. Ohm is the standard unit of electrical resistance, representing the amount of resistance that a material or device offers to the flow of electric current. It is named after the German physicist Georg Simon Ohm, who formulated Ohm's Law. Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor. Therefore, Ohm is the correct unit of measurement for the opposition to current flow.

The primary flight controls are responsible for controlling the directional movement about the axis of an aircraft. These controls include the rudder, which is located on the vertical stabilizer at the tail of the aircraft. By manipulating the rudder, the pilot can control the yawing motion of the aircraft, allowing it to turn left or right. Therefore, the primary flight controls are the correct answer for this question.

The O-ring provides the sealing action when the coupling is torqued. O-rings are commonly used as sealing elements in mechanical systems. They are circular rings made of elastomer material, which is flexible and can create a tight seal when compressed between two surfaces. In the case of the Wiggins coupling, when torque is applied, the O-ring is compressed, creating a seal that prevents leakage of fluid or gas.

The correct answer is "The largest size that will fit." This is because a larger cotter pin will provide more stability and security to the fastener. A smaller cotter pin may not be able to withstand the forces and vibrations that the fastener may experience. Therefore, it is recommended to use the largest size that can still fit in the fastener to ensure its effectiveness.

The correct answer is "Lower sides of the heads of screws and bolts." When installing removable screws and bolts, sealant is typically applied to the lower sides of the heads. This helps to create a seal and prevent any leakage or loosening of the fastener. Applying sealant to all metal surfaces, the holes, or the threads and shanks is not necessary and may interfere with the proper installation and function of the screws and bolts.

A pneumatic buffer would be the most suitable tool to repair a fuel cell fitting flange. A pneumatic buffer is a tool that uses compressed air to create a high-speed rotation, which can be used to smooth out surfaces and remove imperfections. In the case of a fuel cell fitting flange, the pneumatic buffer can be used to remove any rust, corrosion, or other debris that may be present on the flange, ensuring a clean and secure connection. This tool is specifically designed for polishing and buffing tasks, making it the best choice for repairing a fuel cell fitting flange.

During contingencies, special workcards called contingency decks may be authorized for use. These workcards are specifically designed to address and handle unexpected situations or emergencies that may arise. They provide step-by-step instructions and guidelines for carrying out necessary tasks during these contingencies, ensuring that work is done efficiently and safely. Contingency decks are essential in maintaining operational readiness and minimizing disruptions during unforeseen events.

The correct answer is "Hourly post-flight." Hourly post-flight inspections are conducted every hour during aircraft operations to ensure the aircraft's continued airworthiness. These inspections are more detailed than the basic post-flight inspection and involve a thorough examination of the aircraft's systems, components, and overall condition. By conducting hourly post-flight inspections, any potential issues or discrepancies can be identified and addressed promptly, ensuring the safety and reliability of the aircraft.

Effective grounding involves providing a path for static electricity to flow to a grounding point. This helps to prevent the buildup of static electricity and ensures that it is safely discharged to the ground. By creating a pathway for the flow of static electricity, grounding helps to protect equipment and personnel from potential damage or harm. It is an important safety measure in various industries, including aviation, where static electricity can pose a significant risk.

The atmosphere level is considered to be oxygen deficient when the percentage of oxygen is less than 19.5%.

The correct answer is "is managed on a functional basis." This means that the Air Force supply system is organized and managed based on specific functions or tasks rather than being consolidated or focused on a specific location or containing a limited amount of items. This approach allows for more effective management and coordination of the supply system across different functions within the Air Force.

Congress is responsible for allocating the money used to buy Air Force property. As the legislative branch of the United States government, Congress holds the power of the purse and has the authority to appropriate funds for various government agencies and departments, including the Air Force. Through the annual budget process, Congress determines the amount of funding that will be allocated to the Department of Defense, which includes the Air Force, to acquire and maintain its property and equipment.

Dual-impeller, electrically driven fuel pumps are used for engine feed in the forward and AFT reservoir tanks of a fighter aircraft. These pumps have two impellers, which allow for increased fuel flow and pressure. The electrically driven mechanism ensures reliable and consistent operation of the pumps. This type of fuel pump is commonly used in aircraft to ensure a steady supply of fuel to the engines, which is crucial for their performance and safety.

The most probable cause of the malfunction in the crossfeed system is a malfunctioning boost pump. The boost pump is responsible for providing pressure to route fuel to the crossfeed manifold. If the boost pump is not functioning properly, there will be no pressure available, leading to the malfunction. The other options, such as FOD stuck in a shutoff valve, an inoperative pressure transmitter, or a stuck open check valve, may also cause issues in the fuel system but are less likely to be the main cause of the pressure loss in this specific scenario.

The proper "grip length" of a bolt on an aircraft is slightly shorter than the thickness of the material being joined. This is because the bolt needs to securely fasten the two materials together without extending too far beyond the joint. If the grip length is too long, it may cause interference or damage to other components. Therefore, a slightly shorter grip length ensures a proper fit and avoids any potential issues during assembly and operation of the aircraft.

The roundhead screw would most likely be found on fuel system electrical components because it has a rounded top that provides a larger contact area, ensuring a secure connection between the screw and the electrical component. This type of screw is commonly used in applications where electrical connections need to be made, such as in fuel system electrical components.

Clamps that do not restrict flow are not considered an unserviceable hose condition because they do not affect the functionality or performance of the hose. While evidence of abrasion or distortion, hardening or lack of flexibility, and separation of the cover can all indicate damage or wear on the hose, clamps that do not restrict flow do not pose a risk or hinder the proper functioning of the hose.

The application life of sealant is based on the temperature and humidity conditions. In this case, the correct answer is 70°F and 50% humidity. This means that the sealant will have the optimal performance and durability when applied at a temperature of 70°F and a humidity level of 50%.

The test performed on a cell repair area to determine if the cement is ready for patch application is the Knuckle test. This test involves lightly tapping the surface of the cement with the knuckle of the finger. If the cement feels hard and does not leave an indentation, it is considered ready for patch application.

End-of-runway inspection involves checking for any debris, foreign object damage (FOD) covers, cut tires, and ensuring the removal of safety pins. This type of inspection is conducted at the end of the runway before an aircraft takes off. It is crucial to identify and remove any potential hazards or obstructions that could affect the safety and performance of the aircraft during takeoff or landing.

Work habits and housekeeping are two major contributors to foreign object damage. Poor work habits, such as not properly securing tools or not following safety protocols, can lead to objects being left in areas where they can cause damage. Similarly, if housekeeping is not maintained and debris is not regularly cleaned up, foreign objects can accumulate and pose a risk. Both work habits and housekeeping are important factors in preventing foreign object damage and ensuring a safe and organized work environment.

The model T477W bonding meter is designed to measure resistance. This means that it is specifically calibrated to determine the opposition to the flow of electric current in a circuit. It can accurately assess the resistance of various electrical components or systems, helping to identify any faults or inefficiencies in their performance. The meter may utilize different techniques, such as the measurement of voltage and current, to calculate resistance accurately.

When a generator unit is supplying power to the aircraft, a light inside the aircraft will illuminate. This indicates that the generator is functioning and providing electrical power to the various systems and components of the aircraft.

The component maintenance squadron commander is responsible for overseeing the overall management of the squadron. This includes tasks such as maintenance, logistics, and personnel management. The squadron falls under the maintenance group, which is a higher level of command. Therefore, the maintenance group commander is the one who oversees and provides guidance to the component maintenance squadron commander for the overall management of the squadron.

This accident is classified as a Class A mishap because it resulted in the death of a civilian worker. Class A mishaps are the most severe category and involve fatalities or permanent total disability, or the loss of an aircraft worth $2 million or more.

This accident is classified as Class B because it has resulted in the hospitalization of three or more personnel. Class B mishaps are defined as accidents that cause serious injury or illness, but not death, to three or more personnel.

The correct answer is "vaproizes" because volatility refers to the tendency of a substance, in this case, fuel, to vaporize or evaporate quickly. When fuel is volatile, it easily converts from a liquid state to a gaseous state, making it highly flammable and suitable for combustion.

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An abbreviated TO is mainly a work simplification device because it provides concise and condensed information, allowing users to quickly access the necessary information without having to go through lengthy and detailed procedures. Abbreviated TOs are designed to streamline processes and make them more efficient by presenting only the essential steps and information needed to complete a task, saving time and effort for the user.

Pecuniary liability refers to the responsibility of an individual to compensate for any loss, damage, or destruction of government property caused by their misuse or negligence. This type of liability involves the payment of monetary damages to the government to cover the cost of repairing or replacing the damaged property.

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The correct answer is "No deeper than 15% of the tubing wall thickness." This means that scratches and nicks on straight sections of tubing should not exceed 15% of the thickness of the tubing wall. This limit ensures that the structural integrity of the tubing is not compromised and that it can still function effectively.

An Allen wrench should be used to tighten an internal wrenching nut. Allen wrenches, also known as hex keys, have a hexagonal shape at one end and are designed to fit into the corresponding hexagonal socket of the nut. This allows for a secure grip and effective tightening of the nut.

To turn on the T477W bonding meter display and change the meter range, the TEST button is pressed. The TEST button likely activates the meter and allows the user to navigate through different meter ranges.

The correct answer is evacuating the tank. During tank entry, the attendant's main responsibility is to ensure the safety of personnel by evacuating the tank. This involves removing any individuals from the tank and ensuring that they are safely outside the hazardous area. The other options mentioned, such as alerting the fire department, checking air supply source, and designating the entry authority, may also be important tasks, but they are not the primary responsibility of the attendant during tank entry.

The last step performed while conducting the blow back method of leak source isolation is to mark the area. This is important to ensure that the location of the leak is clearly identified and easily visible. By marking the area, it becomes easier for technicians or maintenance personnel to locate and address the leak in the future.

The PAFSC (Primary Air Force Specialty Code) identifies the awarded specialty that an airman is most highly qualified to perform duty. This code represents the primary career field in which the airman has received specialized training and is considered an expert. It is used to assign personnel to specific job positions and determine their eligibility for certain assignments and promotions within the Air Force.

Nylon fabric is used for repairs on the outside of a bladder cell because it is a strong and durable material that can withstand the harsh conditions and pressures experienced by the bladder cell. It provides a protective layer that helps to prevent further damage and leakage, ensuring the longevity and functionality of the bladder cell.

In the event of a Class I fuel spill on the flightline, the appropriate action is to monitor the spill until the aircraft is moved. This means keeping a close eye on the spill and ensuring that it does not spread or pose any immediate danger. It is important to wait until the aircraft is moved because moving the aircraft can help to minimize the risk of further spillage and potential hazards.

Fuel transfers from the reserve tank on a tanker aircraft during flight due to gravity. Gravity causes the fuel to flow from a higher location (the reserve tank) to a lower location (the main tank). This natural force allows for the transfer of fuel without the need for additional mechanisms or external pressure.

Dump fuel valves control the flow of fuel through the jettison system. These valves are specifically designed to release or dump excess fuel from the aircraft's fuel tanks. This is typically done in emergency situations or when the aircraft needs to reduce its weight for landing. Dumping fuel helps to ensure that the aircraft remains within safe weight limits and reduces the risk of damage to the aircraft during landing.

The correct answer is "automatically stop the flow of fuel into a tank prior to overflow." This is because fuel-level control valves are designed to prevent overfilling of the tank by automatically shutting off the flow of fuel once the desired level is reached. This helps to prevent spills, leaks, and potential hazards associated with overfilling the tank.

The FWD fuel system on a fighter aircraft is designed to prioritize the FWD reservoir tank for refueling. This means that when refueling, the FWD reservoir tank will be filled first before any other tanks, such as the left wing or right wing tanks. This ensures that the aircraft maintains a proper balance of fuel distribution and allows for efficient fuel management during flight operations.

The letter A in the fault code 28-25-AM indicates that a fault isolation diagram is provided. This means that there is a diagram available that can help in identifying and isolating the specific fault within the bomber aerial refueling system. The fault isolation diagram can provide visual guidance and instructions on how to troubleshoot and fix the malfunction.

The purpose of the tank scavenge system on a cargo aircraft is to ensure an uninterrupted flow of fuel to the engines. This system helps to prevent fuel starvation by removing any trapped or low-level fuel from the tanks and delivering it to the engines. By doing so, it maximizes the usable fuel and helps maintain a consistent fuel supply to the engines, thus ensuring their continuous operation without interruption.

The scavenge system is used to transfer fuel from one tank to another in order to maintain balance and prevent fuel imbalance. To perform an operational check of the scavenge system, a sufficient amount of fuel must be present in the tank. The correct answer of 12,000 lbs indicates that this is the minimum amount of fuel required for the scavenge system operational check to be performed effectively.

The purpose of the cargo aircraft vent system is to prevent overboard fuel spillage. This system is designed to regulate the pressure inside the aircraft's fuel tanks and prevent fuel from leaking out during flight. By maintaining a controlled pressure, the vent system ensures that the fuel remains securely contained within the aircraft, reducing the risk of environmental pollution and potential hazards.

The external tank and pressurization valve on a fighter aircraft regulate the external tank's pressure between 19 to 24 psi. This means that the pressure inside the tank is maintained within this range to ensure optimal functioning and safety of the aircraft.