2A751 : Aircraft Metals Technology Journeyman! Trivia Quiz

Using arcs does not lend accuracy.

In order to construct an oblique projection, it is important to position the side with the most complex or irregular features as the front view. This is because the front view provides the most detailed and accurate representation of these features, allowing for a more accurate projection. The top view, side view, and rear view may not capture the intricate details of the complex or irregular features as effectively as the front view. Therefore, the front view is the most suitable choice for constructing an oblique projection.

To indicate the location of the center of an arc, one horizontal and one vertical dimension are used. This is because the center of an arc is determined by its position along both the horizontal and vertical axes. By specifying both dimensions, the exact location of the center can be accurately identified.

An adjustable triangle is a good tool to select when you need to quickly draw angles of other than multiples of 15 degrees. Unlike a protractor which is used for measuring angles, an adjustable triangle allows you to easily draw angles of any size. It has a hinge mechanism that allows you to adjust the angle to your desired measurement, making it a versatile tool for drawing precise angles.

A tolerance zone that is at a right angle to a datum plane is called a perpendicular tolerance. This means that the allowable deviation or variation in the specified dimension is perpendicular to the datum plane. In other words, the part or feature being measured must be within a specific range of perpendicularity to the datum plane in order to meet the tolerance requirements. This type of tolerance is commonly used in engineering and manufacturing to ensure proper alignment and fit of components.

When designing a tool item, it is important to consider that standard fasteners are readily available. This means that they can be easily obtained and are commonly found in the market. By using readily available fasteners, it ensures that the tool item can be easily repaired or maintained in case any fasteners need to be replaced. This saves time and effort in sourcing specific or hard-to-find fasteners. Additionally, readily available fasteners also tend to be more cost-effective compared to specialized or rare fasteners.

The disadvantage of using screw guides is that the threads wear over time, which leads to the guide becoming inaccurate. As the threads wear, the guide may no longer provide the precise alignment and guidance required for the screw, resulting in potential errors or difficulties during the screwing process. This can affect the overall quality and accuracy of the work being done.

Honing is an excellent method for accurately reworking an out of round internal taper because it involves the use of abrasive stones or tools that are rotated or reciprocated to create a smooth and precise surface. Unlike filing, which may remove material unevenly and cause further irregularities, honing ensures a consistent and even removal of material, resulting in a more accurate and uniform taper. Buffing and lapping, on the other hand, are not suitable for reworking out of round internal tapers as they are primarily used for polishing and smoothing surfaces rather than correcting shape irregularities.

When you replace a stud with a lockpin that does not cut into the threads, you should drill a new pin hole. This is because the lockpin needs to be securely fastened to the stud, and drilling a new hole ensures a proper fit and prevents any potential damage to the threads. Reusing the old pin or the old pin hole may result in a loose or unstable connection, compromising the integrity of the stud. Tapping the pin hole is not necessary in this scenario as the lockpin does not cut into the threads.

As an aircraft metals technologist performing field level repairs, completing a class A certification is necessary. This certification is likely to cover a wide range of topics related to aircraft metals and their repair techniques. It would provide the technologist with the necessary knowledge and skills to effectively perform their job and ensure the safety and efficiency of the aircraft. Additionally, it may also involve understanding and complying with industry regulations and standards.

When dividing an area into equal spaces, using a scale that spans slightly more than the space you want to divide ensures that the divisions are accurate and evenly distributed. This allows for a better visual representation and avoids any potential inaccuracies that may occur if the scale spans slightly less than the space.

Local notes are explanations or annotations that apply directly to a specific portion or feature of a drawing. These notes provide detailed information about specific dimensions, materials, or instructions related to a particular area of the drawing. Unlike general notes, which provide more general information about the entire drawing, local notes are specific and focused on a particular part. They help to clarify and provide additional details about specific elements of the drawing, making it easier for the reader to understand and interpret the information accurately.

The small rule with holder is a useful tool for measuring internal recesses. It allows for accurate and precise measurements within tight spaces that may be difficult to access with other measuring tools. By using the small rule with holder, one can easily measure the dimensions of internal recesses such as holes, slots, or gaps. This tool is particularly beneficial in industries such as manufacturing or engineering where precise measurements are crucial for ensuring proper fit and functionality of components.

Tungsten in carbide form is considered a non-ferrous tool material because it does not contain iron. Tungsten carbide is a popular choice for tool materials due to its exceptional hardness and resistance to wear. It is commonly used in cutting tools, such as drills and milling cutters, as it can withstand high temperatures and maintain its sharpness for longer periods of time. This makes it suitable for applications that require machining hard materials like steel and cast iron.

A jig is a device used in machining and woodworking that guides the cutting tool to ensure accurate and precise cuts. It is designed to hold and position the workpiece, allowing the cutting tool to move along a predetermined path. On the other hand, a fixture is used to hold and support the workpiece during machining operations, providing stability and preventing movement. While a fixture supports the workpiece, it does not guide the cutting tool. Therefore, the statement "a jig guides the cutting tool and a fixture does not" is true.

Center lines are the lines that represent the axes of symmetrical parts and serve as extension lines for holes or other features. They are used to show the center of a circle or an arc and help in determining the symmetry of a part. Center lines are commonly used in technical drawings to provide clear and accurate information about the shape and dimensions of a part.

If you dimension a long arc whose center is off the print, the leader line is broken. This means that the leader line will have breaks or gaps in it, indicating that the center of the arc is not shown on the print.

The screws used to fasten pulleys and gears onto shafts are commonly referred to as setscrews. Setscrews are typically threaded screws that are tightened against a flat surface, such as a shaft, to secure an object in place. Bolts are generally used with nuts to join two or more components together, while studs are threaded rods that serve as a fastening point. Capscrews are similar to bolts but typically have a socket head. Therefore, setscrews are the most appropriate term for the screws used in this context.

A channel jig is a type of jig that allows the user to perform machine operations on three sides. It typically consists of a channel-shaped structure with slots or holes where the workpiece can be securely held. This design allows for easy access to multiple sides of the workpiece, making it suitable for operations that require machining on different surfaces. The other options, such as leaf jig, plate jig, and sandwich jig, may have different configurations and purposes, but they do not specifically enable machine operations on three sides.

When using press fit for knurling, it is important to include the tolerance diameter before the knurl on the print. This is because the knurling process will slightly increase the diameter of the part, and the tolerance diameter before the knurl ensures that the part will still fit properly in the assembly. Including the tolerance diameter before the knurl allows for proper clearance and ensures that the knurled part will fit correctly in the desired application.

Fiber insert nuts are commonly used as self-locking nuts on aircraft. These nuts have a nylon or plastic insert that provides resistance against loosening due to vibrations and torque. The insert creates friction between the nut and the bolt, preventing the nut from rotating freely. This self-locking feature ensures that the nut remains securely fastened, even in high-vibration environments typically experienced in aircraft operations. Wing nuts, engine nuts, and hexagon nuts are also used in aircraft, but they may not have the same self-locking properties as fiber insert nuts.

When using a hacksaw blade to remove a broken plug, it is important to make a wooden handle. This is because a wooden handle provides a better grip and control while using the hacksaw blade. It also helps to prevent any potential injuries or accidents that may occur due to the blade slipping or losing control. Additionally, a wooden handle absorbs some of the vibrations produced during cutting, making the task more comfortable and efficient.

An aircraft needle bearing is the most suitable option for installing an aircraft bearing that requires exceptionally high radial load capacity in a small size. Needle bearings are designed to handle high radial loads and have a small cross-sectional area, making them ideal for applications where space is limited. Additionally, needle bearings have a long and thin roller shape, which allows them to distribute the load evenly and efficiently. Therefore, an aircraft needle bearing would be the best choice in this scenario.

When constructing a figure using geometric construction, a pencil is needed to make markings on the paper. A compass is used to draw circles or arcs of a specific radius. A straightedge is used to draw straight lines or to measure distances accurately. Therefore, the correct tools needed for geometric construction are a pencil, a compass, and a straightedge.

The correct answer is "the surface pattern produced by tool marks". This means that when a material is subjected to machining or cutting processes, the tools used can leave marks or patterns on the surface. These tool marks can vary in depth, width, and direction, and they can be used to identify the type of tool that was used. Therefore, the surface pattern of a material can provide information about the machining process it has undergone.

When constructing circles and arcs on drawings, it is important to first draw the circles or arcs. This is because the circles or arcs serve as the main shapes that need to be accurately represented in the drawing. By drawing them first, it ensures that the correct size and position of the circles or arcs are achieved. Once the circles or arcs are drawn, other elements such as straight lines, bisectors of circles, and straight line tangents can be added accordingly to complete the construction.

Faulty design can be the leading cause of tool failure because if a tool is not designed properly, it may not be able to withstand the intended usage or perform its function effectively. A poorly designed tool may have weak points, inadequate materials, or lack of proper reinforcement, leading to premature wear, breakage, or malfunction. This can result in reduced efficiency, safety hazards, and increased maintenance or replacement costs.

Fabric lined anti-friction bearings are designed specifically to handle heavy load applications. These bearings are constructed with a fabric lining that helps to distribute the load evenly and reduce friction, allowing them to withstand the high pressures and forces associated with heavy loads. This design ensures that the bearing can effectively support and carry heavy loads without experiencing excessive wear or failure.

When constructing plane figures, you are showing three-dimensional objects, like a ball. A plane figure is a two-dimensional shape that exists on a flat surface, such as a piece of paper. However, when you construct these figures, you are giving them depth and representing them as three-dimensional objects. A ball is an example of a three-dimensional object that can be constructed using plane figures.

A ring jig is the correct tool to use for drilling a hole and the flange of a shaft collar. A ring jig is a specialized tool that holds the workpiece securely in place while allowing for precise drilling. It is designed specifically for drilling holes in circular objects like shaft collars. The ring jig ensures that the hole is drilled accurately and in the correct position, resulting in a properly fitted collar.

When the projection lines are parallel to each other and perpendicular to the projection plane, the resulting projection is known as an orthographic projection. In this type of projection, the object is represented without any distortion or foreshortening, providing a true and accurate representation of its shape and size.

An offset section is used when you need to show two or more different direction cutting planes through an object. This type of section allows you to offset the cutting plane from the object's centerline or axis, providing a clear view of the internal features or components. By offsetting the section, you can highlight specific areas of interest and show multiple perspectives simultaneously. This is particularly useful when complex geometries or intricate details need to be displayed in a clear and understandable manner.

The correct answer is "views where the contours appear." When showing contour dimensions on a blueprint, it is important to indicate the size and location of holes in the views where the contours are visible. This ensures that the dimensions are accurately represented and easily understood by the reader. Placing the dimensions in the views with the contours allows for clear and concise communication of the necessary information.

DD form 1577-2, also known as the Green tag, is used for shop equipment that requires only a prior to use inspection and is repairable but in an unserviceable condition. This form is used to identify equipment that needs repair or maintenance before it can be used effectively. The Green tag indicates that the equipment is not currently in working condition but can be repaired to become operational again.

In an orthographic projection, only one view is needed to accurately represent the object. This is because an orthographic projection shows the object from multiple sides simultaneously, including the front, top, and side views. Therefore, a single view is sufficient to convey all the necessary information about the object's shape and dimensions.

Using an inverted die procedure reduces the possibility of bending stock because the die is positioned above the material being worked on. This allows for better control and support of the material, minimizing the chances of it bending or warping during the operation. This advantage is particularly important when working with delicate or easily deformable materials.

Using geometric construction is the most accurate method for constructing a perpendicular bisector. Geometric construction involves using a compass and straightedge to create precise and accurate constructions. By constructing the perpendicular bisector using geometric construction, we can ensure that the line is exactly perpendicular to the given line segment and passes through its midpoint. This method allows for precise measurements and ensures the accuracy of the construction.

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An oblique projection is a type of pictorial view that shows the object with one face parallel to the picture plane and the other faces at an angle. In this projection, the object is displayed with a combination of two or more scales, resulting in a more realistic representation. It provides a three-dimensional view with depth and height, making it suitable for presenting objects with irregular shapes. Orthographic projection, on the other hand, shows the object in a two-dimensional view with all the faces parallel to the picture plane. Isometric projection and axonometric projection are also types of pictorial views, but they show the object with equal scales for all three dimensions, resulting in a more distorted representation.

The welding symbol is placed on the top of the reference line to indicate that a weld needs to be placed on the other side of the part. This placement signifies that the weld symbol applies to the side opposite to where the symbol is placed. Placing the symbol on the top of the reference line is a standardized convention in welding documentation.

When placing a workpiece on a V locator, you restrict movement laterally. This means that the workpiece is prevented from moving side to side. The V locator acts as a guide or support for the workpiece, ensuring that it stays in place and does not shift horizontally. This restriction is important in maintaining the accuracy and stability of the workpiece during machining or other operations.

The diamond locator pin on a cylinder locator allows for a slight deviation between the holes in the work piece. This means that the pin can adjust slightly to accommodate any variations or inconsistencies in the hole positions. It provides flexibility and ensures that the work piece can still be securely held in place even if the holes are not perfectly aligned.

The phrase "dish the blank" refers to the deformation or bending of the material during the progressive operation. This is a disadvantage because it can result in the production of defective or unusable blanks. The dished blank may not meet the required specifications and may need to be discarded, leading to more scrap generation. Additionally, the dishing of the blank can also affect the overall quality and durability of the final product.

A flatness tolerance is described as a tolerance zone defined by two parallel planes. This means that the acceptable range for the flatness of a surface is determined by these two parallel planes. Any surface within this tolerance zone is considered to be within the acceptable flatness limits.

Manufacturers allow a tolerance of 10 percent on ordinary working gages. This means that the measurements taken by these gages can deviate from the actual value by up to 10 percent. This allowance is made to account for any potential variations or inaccuracies in the manufacturing process of the gages. It ensures that the gages can still provide reliable measurements within an acceptable range of error.

Extension lines are the lines that extend from the edge or surface of an object to indicate the limits to which a measurement applies. They are used to show the starting and ending points of a dimension. In technical drawings, extension lines are typically drawn as thin, dotted lines that are perpendicular to the dimension line. They help to clarify the specific area or feature being measured and provide a clear reference for the dimension.

The maximum recommended length of lap for lapping long spindles is 4 times the work diameter. This means that the length of the lap should be four times the diameter of the workpiece being lapped. This is important because a longer lap allows for more consistent and efficient lapping, ensuring that the entire surface of the workpiece is properly lapped. Using a lap that is too short may result in uneven lapping and incomplete coverage of the workpiece surface. Therefore, it is recommended to use a lap that is four times the diameter of the workpiece for lapping long spindles.

The correct answer is that the metal is cut in tension instead of shear when using the rubber die process. In the rubber die process, a hard rubber forms the metal while a rubber backing reduces vibration. When the metal is cut in tension, it means that the force is applied perpendicular to the surface of the metal, causing it to stretch and eventually break. This is different from cutting in shear, where the force is applied parallel to the surface, causing the metal to slide and separate along a plane.

The correct answer is 1/32" for smaller studs. This means that the width of the spline face of a locally manufactured stud removal tool should be 1/32" for smaller studs.

A hacksaw blade can be used to remove a broken plug by cutting into the plug and creating notches. These notches can then be used to grip the plug and twist it out of the socket. The blade's thin and sharp teeth make it suitable for this task as it can easily cut through the plug material. Additionally, the flexibility of the blade allows for maneuverability in tight spaces, making it a practical tool for plug removal.

A slipper bearing is a type of bearing that allows movement along a straight line. It consists of a flat surface that slides against another flat surface, allowing for linear motion. This type of bearing is commonly used in applications where there is a need for smooth and precise movement in a straight line, such as in machine tools or linear motion systems. Unlike other types of bearings, such as thrust bearings or trunnion bearings, slipper bearings are specifically designed to accommodate linear motion rather than rotational motion.