2A753 EOC Exam Pretest

When multiplying fractions, we multiply the numerators together and the denominators together. In this case, multiplying 5/6 by 3/5 gives us (5 * 3) / (6 * 5) = 15/30. Simplifying this fraction by dividing both the numerator and denominator by 15, we get 1/2. Therefore, the correct answer is 1/2.

When the anode is smaller in relation to the cathode in an electrochemical corrosion cell, the rate of corrosion is rapid and severe. This is because the anode, which is the metal that undergoes corrosion, has a smaller surface area compared to the cathode. As a result, the anode experiences a higher current density, leading to accelerated corrosion. The severity of the corrosion is also increased due to the concentration of corrosion products being higher in a smaller area, causing more damage to the metal.

Some metals have the ability to become electrochemically inactive or passive under certain conditions because of the formation of oxide films. These oxide films act as a protective layer on the metal surface, preventing further corrosion or chemical reactions. This phenomenon is commonly observed in metals such as aluminum, stainless steel, and titanium. The oxide films provide a barrier between the metal and the surrounding environment, reducing the metal's reactivity and enhancing its corrosion resistance. Therefore, the correct answer is oxide films.

Corrosion preventive compounds (CPC) are categorized based on their ability to displace water. Water displacing CPCs are designed to remove moisture and prevent the formation of rust by displacing water from metal surfaces. On the other hand, non-water displacing CPCs do not have this ability and are used for general corrosion prevention purposes. This categorization helps in selecting the appropriate CPC based on the specific requirements and conditions.

Chemical paint remover is mixed immediately before use to ensure its effectiveness. Mixing it too early can cause the remover to lose its potency or evaporate, reducing its ability to remove paint effectively. By mixing it immediately before use, the remover remains fresh and active, allowing it to work efficiently on the painted surface.

When using parallel strokes with a spray gun, it is recommended to overlap 50 percent of the previous stroke. This allows for a more even and consistent coverage of the surface being sprayed. Overlapping too much may result in excessive build-up of paint, while overlapping too little may lead to uneven coverage and missed spots. Therefore, overlapping 50 percent strikes a balance between these two extremes and ensures a high-quality finish.

To remove foreign material from inside a completed tubing assembly, flushing with a technical order (TO) approved solvent is the correct method. This solvent is specifically approved for use in this situation and is designed to effectively clean the tubing assembly without causing any damage. Flushing with water or immersing in water may not be sufficient to remove certain types of foreign material, while blowing with compressed air only may not be as effective in completely removing the material. Therefore, using a TO-approved solvent is the most appropriate and effective solution.

The fuselage is the main structural assembly of an aircraft to which other assemblies are directly or indirectly attached. It is the central body of the aircraft that houses the crew, passengers, and cargo. The wings, nacelles (engine housing), and empennage (tail assembly) are all connected to the fuselage. Therefore, the correct answer is fuselage.

The best file to use on a concave surface is a half-round file. This type of file has a curved shape with one flat side and one rounded side, allowing it to smoothly and accurately shape concave surfaces. The combination file has both flat and rounded surfaces, making it versatile but not specifically designed for concave surfaces. The double-cut file has two sets of diagonal teeth, providing a rougher and faster cutting action, but it may not be as precise on concave surfaces. The single-cut file has one set of diagonal teeth and is better suited for flat surfaces rather than concave ones.

To inspect for distortions, a grid made up of horizontal and vertical lines is used. This grid helps to identify any irregularities or deformations in the panel being inspected. By comparing the lines of the grid to the lines on the panel, any distortions or misalignments can be easily detected. The grid provides a reference point for assessing the accuracy and quality of the panel, ensuring that it meets the required standards.

Before developing a rivet layout for a circular flush repair, it is essential to establish the center point of the cutout area. This is because the center point will determine the positioning of the rivets and ensure that they are evenly spaced and properly aligned for a successful repair. Without determining the center point, the rivet layout may be inaccurate and could lead to structural issues or a flawed repair.

A thin line with alternating and evenly spaced long and short dashes is called a center line. Center lines are used in technical drawings to indicate the center of an object or to show symmetry. They help in aligning and positioning other elements in the drawing.

Corrosion that appears as blistering, exfoliation, and scaling or flaking is classified as severe. This is because these symptoms indicate a significant level of damage and deterioration, suggesting that the corrosion has progressed to a more advanced stage.

Respirators should be cleaned and disinfected at the end of each day in which they are used. This is important to ensure that the respirator remains clean and free from any contaminants that may have been encountered during use. Regular cleaning and disinfection help to maintain the effectiveness of the respirator and prevent the spread of any harmful substances. Cleaning and disinfecting once a week or once a month may not be sufficient, as the respirator may be exposed to different contaminants on a daily basis.

Using a washer-nut assembly on a taper-lok pin can eliminate the problem of washer fumbling. This means that the washer will remain securely in place and not move or fall off during the assembly process or while in use. This can help ensure that the pin and washer are properly aligned and provide a secure connection.

A drill bushing fixture is not required to remove a tight Jo-bolt fastener. A punch is used to create an indentation in the fastener, a hammer is used to strike the punch and loosen the fastener, and a pilot drill is used to create a small hole in the fastener. However, a drill bushing fixture is not necessary for removing a tight Jo-bolt fastener.

A torch is not a suitable tool for cutting cables because it uses an open flame, which can cause damage to the cable and potentially lead to a fire hazard. Cold chisels, cable swagers, and cutting machines are all designed specifically for cutting cables safely and effectively.

The correct answer is "riveting." Riveting hammers are specifically designed for the task of riveting, which involves joining two pieces of metal together by hammering a metal pin or rivet through them. This type of hammer is typically smaller and lighter than a framing hammer, making it suitable for light chiseling tasks. Mallets and rawhide hammers are not typically used for chiseling, as they are better suited for tasks such as woodworking and leatherworking respectively.

When the bar folder does not operate freely, the most likely adjustment that needs to be made is the thickness. If the bar folder is not operating smoothly, it could be because the material being folded is too thick for the machine to handle. Adjusting the thickness setting can help ensure that the bar folder can operate freely and effectively fold the material without any issues.

Before installing a plastic assembly into its retaining frame, it is recommended to clean the frame with an approved solvent. This is because an approved solvent is specifically designed to effectively remove any dirt, grease, or contaminants from the frame without causing any damage to the plastic assembly or the frame itself. Using a mild soap and water solution, a high detergent soap, or alcohol may not be as effective in thoroughly cleaning the frame or may potentially harm the plastic assembly. Therefore, using an approved solvent is the best option for ensuring a clean and safe installation.

A plastic scraper would be the most suitable tool to dislodge blisters or bubbles during a corrosion inspection. Unlike a knife or metal scraper, a plastic scraper is less likely to cause further damage to the surface being inspected. It is gentle enough to remove the blisters or bubbles without scratching or gouging the material. A straight-edge, on the other hand, is not designed for this purpose and would not be effective in dislodging blisters or bubbles.

The paint edges around the chemically stripped areas are feathered in order to ensure a smooth, overlapping transition between the old and new paint surfaces. Feathering the edges helps to blend the new paint with the existing paint, creating a seamless appearance. This technique is commonly used in automotive painting and other applications where a uniform finish is desired.

A paint roller is not suitable for painting aircraft located at a paint facility because paint facilities typically require more precise and controlled methods of painting, such as using spray guns or specialized equipment. Paint rollers are more commonly used for larger, flat surfaces and may not provide the level of detail and precision needed for aircraft painting.

The vertical stabilizer reduces sway or yaw about the vertical axis of an aircraft. The vertical stabilizer, also known as the fin, is located at the tail of the aircraft and provides stability and control during flight. It helps to counteract the tendency of the aircraft to yaw or swing from side to side. By providing vertical stability, the vertical stabilizer plays a crucial role in maintaining the aircraft's balance and ensuring a smooth and controlled flight.

Bulkheads provide shape, strength, and rigidity to the aircraft fuselage. They are structural partitions that divide the fuselage into compartments, providing support and maintaining the shape of the aircraft. Bulkheads are typically made of strong materials such as aluminum or composite materials and are designed to withstand the various forces experienced during flight, including aerodynamic loads and pressurization. They also help to distribute loads evenly throughout the fuselage, ensuring structural integrity and preventing deformation. Spars, stringers, and longerons are also important structural components of the fuselage, but they primarily provide support and reinforcement rather than shape and rigidity.

The correct answer is "rivet spacing and row spacing are identical". This means that the distance between each rivet and the distance between each row of rivets are the same. This is important in a layout pattern on a square flush patch to ensure that the rivets are evenly spaced and aligned, providing structural integrity and a uniform appearance. If the rivet spacing and row spacing were not identical, it would indicate an error in the measurements used to develop the rivet pattern.

After each sandpaper grit is used, the sanded area of a scratch is washed down to remove the previously used sandpaper grit. This is important because the previous grit may have left behind particles or residue that can interfere with the sanding process using the next grit. By washing away the previous grit, the surface is prepared for the next level of sanding, ensuring a smooth and even finish.

When using an original door as a template, it is important to ensure that the original door has the proper fit. This means that the dimensions and shape of the original door should match the desired door that is being created. If the original door does not have the proper fit, it will not serve as an accurate template and may result in a new door that does not fit correctly in its intended space.

When locating a specific point on a blueprint, zone numbers are used. Zone numbers are used to divide large blueprints into smaller sections, making it easier to locate specific points. By referring to the zone number, one can quickly identify the general area on the blueprint where the desired point is located, facilitating precision and efficiency in reading and interpreting blueprints.

The correct answer is bend allowance. The bend allowance refers to the amount of metal that is required to form a bend in a material. It takes into account factors such as the thickness and properties of the material, as well as the angle and radius of the bend. By calculating the bend allowance, manufacturers can determine the correct length of material needed to achieve the desired bend, ensuring accurate and precise fabrication.

Starting the sander before it touches the metal helps to prevent the sander from digging into the metal because it allows the operator to have better control over the tool. By starting the sander before it makes contact with the metal, the operator can gradually apply pressure and ensure that the sanding process is done smoothly and evenly. This technique helps to avoid any sudden or excessive force that could cause the sander to dig into the metal and potentially damage it.

Tinner's snips are a type of metal cutting snips that have straight blades. These snips are commonly used by tinners or sheet metal workers for cutting straight lines in metal sheets. The straight blades allow for precise and clean cuts, making them suitable for various applications in metalworking. Offset snips have angled blades, curved snips have curved blades, and aviation snips have a different design altogether, making them different from tinner's snips.

The correct answer is when there is no discoloration on a clean drying cloth. This indicates that the surface has been effectively cleaned and there are no remaining contaminants or residue.

Magnesium is the world's lightest structural metal. It has a low density, making it lightweight and ideal for applications where weight is a critical factor. Magnesium is commonly used in the aerospace and automotive industries due to its high strength-to-weight ratio. It is also used in electronic devices, sporting goods, and medical implants.

Composite materials are known for their ability to resist fatigue and corrosion. Fatigue resistance refers to the material's ability to withstand repeated loading and unloading without cracking or breaking. Corrosion resistance, on the other hand, refers to the material's ability to resist damage caused by chemical reactions with its surroundings. These qualities make composite materials durable and long-lasting, which is why they are often used in industries where fatigue and corrosion are common concerns, such as aerospace and marine engineering.

After drilling the heads off stuck screws and lifting the panel away, it is important to ensure that any remaining screw shanks are extracted. This is necessary to prevent any potential hazards or issues that may arise from leaving the shanks in place. Extracting the remaining screw shanks ensures that the task is fully completed and eliminates any potential problems that may occur from leaving them behind.

Aramid/epoxy materials are identified by their yellow-gold color. This color is specific to these materials and helps in easily distinguishing them from other types of materials.

Blueprints and mechanical drawings are essentially the same thing, just referred to by different names. Blueprints are a type of technical drawing that provides detailed information about the design and construction of a mechanical or architectural structure. They typically include information such as dimensions, materials, and assembly instructions. Mechanical drawings, on the other hand, specifically refer to technical drawings related to machinery and mechanical systems. Therefore, blueprints and mechanical drawings can be used interchangeably to describe the same type of technical drawing.

The longest horizontal dimension that is represented at right angles to the length on a plane surface drawing is the width. The width refers to the measurement of the horizontal distance between the two sides of an object or surface. In a drawing, the width is typically represented by a horizontal line that extends from one side to the other, perpendicular to the length.

Exfoliation corrosion is an advanced form of intergranular corrosion that occurs in metals with a layered structure, such as aluminum alloys. It is characterized by the formation of corrosion products that lift and separate the layers of the metal, leading to a loss of structural integrity. This type of corrosion is particularly dangerous as it can progress rapidly and cause catastrophic failure of the affected material.

Stress-cracking corrosion occurs when a material is subjected to both tensile stress and a corrosive environment. The combination of these factors causes the material to crack and corrode. This type of corrosion is often found in materials such as metals and polymers, and it can lead to catastrophic failures if not properly managed.

A straight edge can be used to detect skin bulge in the early stages of corrosion when inspecting spot welds. By placing the straight edge on the surface of the weld, any bulges or irregularities can be easily detected. This tool allows for a visual inspection and can help identify areas where corrosion may be occurring.

The first step of a general corrosion inspection is to ensure that the area has been thoroughly cleaned. This is important because any dirt, debris, or contaminants on the surface can interfere with the inspection and make it difficult to accurately assess the extent of corrosion. By ensuring that the area is clean, the inspector can get a clear view of the metal surface and properly evaluate the corrosion damage.

Shaving the heads of steel Jo-Bolts is never permissible.

Before using abrasive blasting to remove corrosion, it is important to clean any oil, grease, or other soils from the surfaces. This step is necessary to ensure that the abrasive blasting process is effective and that the surfaces are properly prepared for the removal of corrosion. Cleaning the surfaces helps to remove any contaminants that could interfere with the abrasive blasting process and ensures that the corrosion is the main focus of the treatment. By cleaning the surfaces first, the abrasive blasting can be more efficient and effective in removing the corrosion.

The first step when preparing a part to blast in the plastic media blasting booth is to thoroughly clean the substrate. This is important because any dirt, grease, or contaminants on the surface can affect the blasting process and the quality of the finished product. Cleaning the substrate ensures that the plastic media can effectively remove any rust, paint, or other unwanted materials from the surface. It also helps to create a clean and smooth surface for the blasting process, allowing for better adhesion of coatings or paints that may be applied afterwards.

The temperature should be at room temperature when mixing a touch-up pen paint applicator pen. This is because room temperature allows the paint to flow smoothly and evenly, ensuring better application and coverage. Extreme temperatures, such as 60 or 90 degrees, can alter the consistency of the paint and affect its performance. Similarly, the outside temperature may be too hot or cold, which can also impact the paint's quality and application. Therefore, it is best to mix the paint at room temperature for optimal results.

When the coating material is too cold while spray painting, it can cause orange peel. This occurs because the cold coating material does not flow smoothly and evenly onto the surface, resulting in a textured or "orange peel" appearance.

A plotter is a component of a computerized stencil system that cuts stencils to their final size. A plotter is a device that uses a pen or a blade to draw or cut precise lines and shapes on paper or other materials. In the context of a stencil system, a plotter would be programmed to accurately cut the stencil material to the desired dimensions, ensuring a precise and accurate stencil for use. Therefore, the correct answer is plotter.

To drill an interference fit hole for a fastener, the correct method is to first pilot drill the hole to create a smaller initial hole. Then, a reamer is used to finish the hole to the desired size. This process ensures that the hole is accurately sized and allows for a tight fit between the fastener and the hole, preventing any unwanted movement or play. Using only a reamer or only a drill bit would not achieve the same level of precision and accuracy in creating the interference fit hole.

If the nut plate is misaligned after installing it using pull-through blind rivets, the probable cause is that the nut plate was clamped too loosely during installation. When the nut plate is not securely tightened, it can shift and become misaligned. This can result in improper alignment and functionality of the rivet. Therefore, it is important to ensure that the nut plate is clamped tightly during installation to prevent misalignment.

A drift punch is a type of punch that is used to align fastener holes in two pieces of metal. It is specifically designed to have a tapered end, which allows it to fit into the holes and guide the alignment of the two pieces. The tapered shape of the drift punch ensures that it can easily be inserted into the holes and helps prevent any damage to the metal surfaces. This makes it a suitable tool for accurately aligning fastener holes in metal pieces.

When preparing a cutout for an "open area," the correct step is to relieve stress concentrations. This means removing any damage and drilling holes around any cracks to prevent them from spreading further and causing more damage. By relieving stress concentrations, the structural integrity of the cutout area is maintained, ensuring that it can withstand any additional loads or stresses that may be applied to it. This step is crucial in preventing further damage and maintaining the overall strength and stability of the structure.

When determining the overall size of the cutout, it is important to consider the location of any existing fasteners near a damaged area. This is because the cutout should be made in a way that avoids damaging or interfering with the existing fasteners. By taking into account the location of these fasteners, the overall size of the cutout can be determined in a manner that ensures the repair is done effectively without compromising the structural integrity of the fasteners.

Silicon carbide is the correct answer for grinding aluminum using a bench grinder. Silicon carbide is a hard and sharp abrasive that is specifically designed for grinding non-ferrous materials such as aluminum. It is capable of removing material quickly and efficiently without causing excessive heat buildup or clogging. Using aluminum oxide or diamond grinding wheels for aluminum can lead to clogging and ineffective grinding, while garnet is not suitable for grinding metals. Therefore, silicon carbide is the most appropriate choice for grinding aluminum.

When fabricating a filler plate for a flush skin repair in an open area, using the cutout area as a template is the correct approach. This means that the dimensions of the filler plate should match the dimensions of the cutout area. By using the cutout area as a template, you ensure that the filler plate will fit perfectly into the repair area, providing a seamless and flush finish. This method is commonly used in aircraft maintenance and repair to ensure accurate and precise fabrication of filler plates.

To properly remove oxidation from the bare metal of a machine surface, a grit of 400 sandpaper is used. This grit is considered medium and is effective in removing the oxidation without causing too much damage to the metal surface. It provides a good balance between removing the oxidation and maintaining the integrity of the metal. Grits that are too coarse may be too abrasive and leave deep scratches, while grits that are too fine may not effectively remove the oxidation. Therefore, 400 grit sandpaper is the appropriate choice for this task.

Cast iron is the correct answer because it is a type of iron that contains a high amount of carbon. Ferrous metals are those that contain iron, and cast iron is a ferrous metal. Zinc, gold, and silver are not ferrous metals as they do not contain iron.

A wing nut is a type of nut that can be tightened by hand. It has two large metal wings on opposite sides, allowing it to be easily turned without the need for tools. This makes it convenient for quick adjustments or temporary fastenings that can be easily loosened and tightened as needed.

Prevailing torque refers to a type of self-locking nut that cannot be finger tightened and may come in a deformed thread type. This means that the nut requires a specific amount of torque to be applied in order to secure it in place. The prevailing torque feature helps prevent the nut from loosening due to vibration or other external forces. This type of nut is commonly used in applications where secure fastening is crucial to ensure safety and reliability.

Single view drawings are used to manufacture objects using very thin, flat metal. These drawings provide a clear and detailed representation of the object from one perspective, showing all necessary dimensions, shapes, and features. By using a single view drawing, manufacturers can accurately fabricate the object according to the specifications provided, ensuring precision and efficiency in the manufacturing process.

Before wearing a respirator with a tight-fitting face-piece, it is important to be fit tested with the same make, model, and style of respirator that will be used in the workplace. Fit testing ensures that the respirator fits properly and provides a tight seal on the face, minimizing the risk of exposure to hazardous substances. This step is necessary to ensure the effectiveness of the respirator in protecting the wearer's respiratory system. Thoroughly cleaning and disinfecting the respirator, inspecting for damaged parts, and ensuring no facial hair comes between the sealing surface are also important steps, but they are not specifically required before wearing the respirator.

Stenciling is a rapid way of preparing a sign because it involves using a pre-cut template to create a design or text on a surface. By placing the stencil on the desired surface and applying paint or ink over it, the design can be quickly transferred with precision and efficiency. This method eliminates the need for freehand drawing or transferring designs by hand, making it a faster option for sign preparation.

When a cable has a kinked area that has been straightened, it is necessary to repair or replace the cable. Straightening a kinked area can cause damage to the internal wires, which may lead to broken wires or other issues. Therefore, it is important to address this damage to ensure the cable's proper functioning and prevent any potential hazards or failures.

Before fastening the doubler and filler together for a flush repair, the repair parts must be curved to the precise contour of the repair area. This is necessary to ensure that the repair is flush and seamless, without any gaps or irregularities. Curving the parts to match the contour of the repair area allows for a proper fit and improves the structural integrity of the repair. It also helps to maintain the aerodynamic profile of the aircraft, ensuring smooth airflow over the repaired area.

When using a micro stop countersink, each increment of the micrometer adjustment increases or decreases the depth of cut by .001". This means that for every adjustment made on the micrometer, the depth of cut will either increase or decrease by .001 inches.

To minimize fiber fuzz when drilling aramid composite materials, it is recommended to use a dagger spade or brad point bit. These types of drill bits have a sharp point and cutting edges that help to cleanly cut through the material without causing excessive fraying or fiber fuzz. Using a bit with a sharp point and cutting edges reduces the likelihood of the fibers being pulled or torn, resulting in a cleaner and neater hole.

A film adhesive is used to provide a more uniform bondline thickness when making a metal-bonded honeycomb repair. Film adhesives are thin sheets of adhesive material that can be easily applied and provide consistent thickness throughout the bondline. This ensures that the repair is even and strong, as the adhesive is evenly distributed. Foam adhesives, paste adhesives, and liquid adhesives may not provide the same level of consistency in bondline thickness, making them less suitable for this specific repair.

The correct answer is to select the proper sealant cutting tools. When repairing a defective fillet seal, the first step is to choose the appropriate tools for cutting the sealant. This is necessary in order to remove the faulty section from the fillet effectively and prepare it for replacement. By selecting the proper sealant cutting tools, you ensure that the repair process is done correctly and efficiently.

When preparing to mix a two-part sealant, it is important to follow the manufacturer's instructions. The manufacturer's instructions provide specific guidelines on how to properly mix the sealant, ensuring that the correct proportions of each part are used. This is crucial for achieving the desired consistency and effectiveness of the sealant. Following the manufacturer's instructions also helps to ensure that the sealant will perform as intended and adhere properly to the surfaces it is applied to. Using any other source, such as a job guide, technical order, or shop operating instructions, may not provide accurate or specific instructions for the particular sealant being used.

The job guide contains operational checkout procedures. It provides step-by-step instructions and guidelines for performing specific tasks or operations. It helps technicians to ensure that all necessary checks and procedures are followed correctly during the operational checkout process.

The given question asks for an authorized substitute for a taper lok fastener. The options suggest reaming the taper lok hole to accommodate a larger hi-lok fastener, high shear pin rivet, or high shear stump bolt. However, the correct answer states that no substitute exists. This means that there is no authorized alternative to a taper lok fastener, and it cannot be replaced with any of the mentioned options.

Material compatibility refers to the ability of a medium to interact with a material without causing any additional corrosion. In other words, when materials are compatible, they do not react chemically or cause any detrimental effects on each other, such as corrosion. Therefore, the correct answer is "not cause additional corrosion."

Corrosion preventive compounds (CPC) are used to prevent corrosive materials from contacting and corroding bare metal surfaces. This means that these compounds create a protective barrier between the corrosive materials and the metal surfaces, preventing any direct contact and subsequent corrosion. By using CPC, the metal surfaces are shielded and kept safe from the damaging effects of corrosion.

The first step in riveting parts together is to secure the parts to prevent slippage. This is important because if the parts are not properly secured, they may move or shift during the riveting process, resulting in misalignment or improper joining of the parts. By securing the parts, you ensure that they remain in the correct position and alignment, allowing for a successful and accurate riveting process.

A flap is an auxiliary flight control surface that is located on the trailing edge of an airplane's wing. It is used to increase lift and drag during takeoff and landing, allowing the aircraft to maintain a safe and stable flight. By extending the flaps, the wing's surface area is increased, which generates more lift at lower speeds. This helps the aircraft to maintain a higher angle of attack and stay airborne at slower speeds. Therefore, the flap is considered an auxiliary flight control as it assists in controlling the aircraft's lift and drag characteristics during critical phases of flight.

Buttock lines are aircraft reference lines that indicate vertical planes parallel to the plane of symmetry. These lines are used to determine the shape and contours of the aircraft's fuselage. They help in designing and constructing the aircraft's body by providing a reference for the placement of various components and structures. By following the buttock lines, engineers can ensure that the fuselage is symmetrical and streamlined, which is crucial for aerodynamic performance and stability.

A diamond-point chisel is best used for cutting V-shaped grooves. The sharp, pointed tip of the diamond-point chisel allows for precise and clean cuts in the shape of a V. The diamond-point chisel is specifically designed for creating grooves and channels in materials, making it the most suitable option for this task.

When repairing damage to an aircraft, the first step in removing the damaged area is to determine how much undamaged area should be removed. This is important because it ensures that all the damaged parts are properly removed and replaced, and that the structural integrity of the aircraft is not compromised. By removing the appropriate amount of undamaged area, the repair can be done effectively and efficiently, minimizing the risk of further damage or issues.

The largest twist drill that the chuck on a hand drill can normally accommodate is 1/4".

Shrinking is the hand forming operation that refers to the reduction of an area of a piece of metal. This process involves applying force to the metal in order to decrease its size or volume. It is commonly used in metalworking to create curved or concave shapes by compressing the metal. By shrinking the metal, it becomes more compact and takes on the desired shape.

A solid mandrel stake is used to rivet, form, and seam square or rectangular shaped materials. It provides support and stability while working on these materials, ensuring a secure and precise outcome. The other options mentioned, such as conductor stake, blowhorn stake, and creasing stake, are not specifically designed for riveting, forming, and seaming square or rectangular shaped materials.

6061 is the correct answer because it is a heat-treatable aluminum alloy that offers excellent weldability. Heat-treatable alloys can be strengthened by heat treatment processes, and 6061 is known for its good combination of strength, weldability, and corrosion resistance. This alloy is commonly used in various industries, including aerospace, automotive, and construction, where weldability is a crucial factor. 2024, 2025, and 5053 are also aluminum alloys, but they do not have the same level of weldability as 6061.

Passing a listening device along the seams while the area is pressurized allows for the detection of any leaks or defects in the aircraft sealant. By listening for any abnormal sounds or air escaping from the seams, it is possible to identify any potential issues. This method is effective because the pressure inside the area helps to amplify any leaks or defects, making them easier to detect with the listening device.

To use premixed frozen sealant, the correct approach is to simply thaw the sealant and use it. This means that there is no need to use any external heating methods such as a heat gun or heat lamp. Allowing the sealant to thaw overnight is also not necessary. The premixed frozen sealant can be used directly after it has thawed, without any additional steps or equipment.

If the one-part sealant does not go on smoothly, easily, and evenly when applying it to an area, the best course of action is to discard the sealant. This is because if the sealant does not apply properly, it may not provide an effective seal or adhere to the surface correctly. Adding thinner or more accelerators may alter the composition of the sealant and compromise its quality. Whipping air into the sealant is also not a recommended solution as it may introduce air bubbles and affect the performance of the sealant. Therefore, the most appropriate action is to discard the sealant and use a new one.

The formula (A + B) ÷ 2 - C = Depth is used to determine the maximum corrosion pit depth when using a depth gauge. This formula takes the average of the initial and final measurements (A and B), subtracts the reference point (C), and gives the depth of the corrosion pit. This formula is commonly used in corrosion inspection and measurement to calculate the depth of corrosion damage.

The correct answer is "Forward fuselage, upper wings, lower wings, aft fuselage and tail section." This sequence is the general top coating sequence for small aircraft-tail toward hanger exhaust. It starts with the forward fuselage, then moves to the upper wings, lower wings, aft fuselage, and finally the tail section. This sequence ensures that the top coating is applied in a logical and efficient manner, starting from the front of the aircraft and moving towards the back.

The correct answer is "application" because it is the type of tape that is specifically designed to affix large or intricately shaped decals. This type of tape is often used in the process of applying decals to ensure that they are securely attached and properly aligned. Scotch tape, emblem tape, and masking tape are not typically used for this purpose.

The correct answer is height is ½ of the rivet's diameter; diameter is 1½ of the rivet's diameter. This means that when inspecting newly formed solid rivet shop heads, the height of the shop head should be half of the rivet's diameter, and the diameter of the shop head should be one and a half times the rivet's diameter.

Blue color designates aluminum alloy Air Force-Navy (AN) and Military Specification (MS) fittings.

After entering a Red X discrepancy in the AFTO Form 781A, the block on the Air Force Technical Order (AFTO) Form 781H that needs to be checked is "STATUS TODAY". This block provides the current status of the aircraft and helps track any changes or updates related to the discrepancy. It allows maintenance personnel to monitor the progress of resolving the issue and ensures that the necessary actions are taken to rectify the problem.

A primer is a corrosion preventative that is applied before the installation of repair parts. It helps to create a protective barrier between the repair parts and the environment, preventing corrosion from occurring. By applying the primer before installing the repair parts, it ensures that the parts are properly protected and will have a longer lifespan.

Paste adhesives are generally lower in strength compared to other types of adhesives. However, this is true only when the paste adhesive is a single-part mixture. If the paste adhesive is a two-part mixture, it can have higher strength compared to other types of adhesives.

The transition area of a metal-bonded honeycomb panel refers to the area between the flat section of the panel and the panel attachment area. This is the region where the panel transitions from being flat to being attached to another component or structure.

To accurately represent three dimensions on a drawing, it is typically necessary to show at least two views. This is because a single view can only show two dimensions, such as length and width. By adding a second view, usually from a different angle, the third dimension of depth can be depicted. Additional views may be required for complex or intricate objects, but at a minimum, two views are needed to convey a sense of three-dimensionality.

ETIMS is the correct answer because it is a secure web application specifically designed for viewing electronic technical orders (eTOs). The other options, TCM, MIDAS, and JCALS, are not specifically designed for this purpose.

An atom that has gained or lost electrons and has acquired an electrical charge is called an ion. Ions are formed when atoms gain or lose electrons, resulting in a positive or negative charge. Protons are positively charged particles found in the nucleus of an atom, neutrons are neutral particles also found in the nucleus, and electrons are negatively charged particles that orbit around the nucleus. However, only ions have acquired an electrical charge through the gain or loss of electrons.

Uniform surface corrosion refers to the gradual deterioration of a polished surface due to the reaction with the surrounding environment. This corrosion typically starts with a general dulling of the surface, where the once shiny and smooth surface becomes less reflective and loses its luster. This dulling is a result of the formation of a thin layer of corrosion products on the surface, which obscures the original appearance. Therefore, the correct answer is a general dulling of the surface.

When removing corrosion with a hand held wire brush, it is recommended to use a linear motion. This means moving the brush back and forth in a straight line. This motion allows for more control and precision in removing the corrosion, ensuring that the brush covers the entire affected area evenly. Using a circular motion may result in uneven removal and potential damage to the surface. Oscillating and cross hatch motions are not typically used for this purpose.

The correct answer is "desired width of the spray pattern and type of gun used." This is because the distance that the spray gun nozzle is held from the surface affects the width of the spray pattern. Different spray guns have different spray patterns, and the desired width of the pattern will determine the distance at which the nozzle should be held. The type of gun used also plays a role as different guns may have different spray patterns and require different distances for optimal results.

The correct answer is 60 seconds because the touch-up pen paint applicator needs to be mixed for a sufficient amount of time before use. This ensures that the paint is properly blended and ready to be applied. Mixing for 60 seconds allows for thorough mixing without overdoing it, which could potentially affect the consistency of the paint.

The correct answer is "Nonmetallic insert." Nonmetallic inserts are used as a prevailing torque, self-locking nut locking device. These inserts are made of materials such as nylon and provide resistance to vibration and loosening. They create friction between the threads, preventing the nut from coming loose due to heat or other factors. Nonmetallic inserts are commonly used in applications where heat requirements need to be considered.

Cold-working hole expansion is a process used to increase the size of a hole in a metal component by applying compressive forces. This method is commonly employed to improve the fatigue strength of the component, as it induces compressive residual stresses around the hole. These residual stresses help to counteract the tensile stresses that can lead to fatigue failure. Therefore, cold-working hole expansion is used to prevent premature fatigue failure in metal components.