2A753 Volume 4 Structural Maintenance Journeyman

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  • 1/65 Questions

    (601) Other assemblies are directly or indirectly attached to what main aircraft structural assembly?

    • Wings.
    • Nacelles.
    • Fuselage.
    • Empennage.
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2A753 Quizzes & Trivia
About This Quiz

When an aircraft suffers damage, it’s essential to fix it and get back in the air. A structural maintenance journey man is responsible for repairing physical damage, Aircraft Structural Maintenance specialists maintain the high quality structures of Air Force aircraft. Find out if you're qualified to be a structural maintenance journey man.

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  • 2. 

    (601) What reduces sway or yaw about the vertical axis of an aircraft?

    • Wings.

    • Fuselage.

    • Vertical stabilizer

    • Horizontal stabilizer

    Correct Answer
    A. Vertical stabilizer
    Explanation
    The vertical stabilizer is responsible for reducing sway or yaw about the vertical axis of an aircraft. It is a vertical fin located at the rear of the aircraft, usually attached to the tail section. The vertical stabilizer, along with the rudder, helps to stabilize the aircraft and maintain its directional stability. By providing a surface area perpendicular to the airflow, it counteracts any yawing motion caused by factors such as wind or uneven distribution of forces. This helps to keep the aircraft flying straight and level.

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  • 3. 

    (601) When the cockpit control is moved to the right, the right

    • And left ailerons move up.

    • And left ailerons move down

    • Aileron moves up and the left aileron moves down

    • Aileron moves down and the left aileron moves up.

    Correct Answer
    A. Aileron moves up and the left aileron moves down
    Explanation
    When the cockpit control is moved to the right, the right aileron moves up and the left aileron moves down. This is because the ailerons are control surfaces on the wings of an aircraft that are used to control the roll or banking motion of the aircraft. When the control is moved to the right, the right aileron is raised, creating more lift on that side of the wing and causing the aircraft to roll to the right. At the same time, the left aileron is lowered, reducing lift on that side and aiding in the roll to the right.

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  • 4. 

    (601) Which of these is an auxiliary flight control?

    • Flap.

    • Rudder.

    • Elevator.

    • Stabilizer.

    Correct Answer
    A. Flap.
    Explanation
    A flap is an auxiliary flight control that is located on the trailing edge of an aircraft's wing. It is used to increase lift and decrease the aircraft's speed during takeoff and landing. By extending the flaps, the surface area of the wing is increased, which creates more lift. This allows the aircraft to fly at slower speeds while maintaining lift, making it safer for takeoff and landing. The rudder, elevator, and stabilizer are all primary flight controls that are responsible for controlling the aircraft's direction, pitch, and stability, respectively.

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  • 5. 

    (601) What provides shape, strength, and rigidity to the aircraft fuselage?

    • Spars.

    • Stringers.

    • Longerons.

    • Bulkheads.

    Correct Answer
    A. Bulkheads.
    Explanation
    Bulkheads provide shape, strength, and rigidity to the aircraft fuselage. They are vertical partitions that separate the fuselage into different compartments, such as the cockpit, passenger cabin, and cargo hold. Bulkheads are usually made of strong materials like aluminum or composite materials, and they help to distribute the structural loads evenly throughout the fuselage. They also provide support to the skin of the aircraft and help maintain the shape and integrity of the fuselage during flight.

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  • 6. 

    (601) Aircraft reference lines that indicate vertical planes parallel to the plane of symmetry are called

    • Waterlines.

    • Buttock lines

    • Wing stations

    • Fuselage stations

    Correct Answer
    A. Buttock lines
    Explanation
    Buttock lines are reference lines on an aircraft that indicate vertical planes parallel to the plane of symmetry. These lines are used to aid in the design and construction of the aircraft, particularly in shaping the fuselage and other components. By using buttock lines, engineers can ensure that the various sections of the aircraft are symmetrical and aligned correctly, resulting in better aerodynamics and overall performance.

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  • 7. 

    (602) What symbol do you enter on the Air Force Technical Order (AFTO) Form 781A when an aircraft is considered unsafe or unfit for flight?

    • Red X.

    • Red Plus

    • Red Dash

    • Red Diagonal

    Correct Answer
    A. Red X.
    Explanation
    The symbol that is entered on the Air Force Technical Order (AFTO) Form 781A when an aircraft is considered unsafe or unfit for flight is the Red X. This symbol is used to indicate that the aircraft is not in a condition to be flown and requires maintenance or repairs before it can be considered airworthy. The Red X symbol serves as a clear visual indicator to anyone inspecting the aircraft that it should not be operated until the necessary corrective actions have been taken.

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  • 8. 

    (602) When a new Air Force Technical Order (AFTO) Form 781A is initiated, what kind of discrepancies must not be transferred to the AFTO Form 781K?

    • Red X.

    • Red Dash

    • Red Diagonal

    • Discrepancies with a supply document number

    Correct Answer
    A. Red X.
    Explanation
    When a new Air Force Technical Order (AFTO) Form 781A is initiated, discrepancies with a Red X must not be transferred to the AFTO Form 781K. The Red X symbol indicates that the aircraft or equipment is unsafe or unserviceable and requires immediate attention. These discrepancies need to be addressed and resolved before transferring them to the AFTO Form 781K, which is used for historical documentation.

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  • 9. 

    (602) What block on the Air Force Technical Order (AFTO) Form 781H do you check after entering a Red X discrepancy in the AFTO Form 781A?

    • STATUS TODAY

    • SYMBOL STATUS

    • CURRENT STATUS

    • STATUS CONDITION

    Correct Answer
    A. STATUS TODAY
    Explanation
    After entering a Red X discrepancy in the AFTO Form 781A, you would check the "STATUS TODAY" block on the Air Force Technical Order (AFTO) Form 781H. This block provides the current status of the aircraft or equipment, indicating whether it is operational or non-operational. By checking this block, you can determine the current status of the item in question and track any changes or updates.

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  • 10. 

    (603) When performing a visual inspection on nicked plastic assemblies, what are you looking for?

    • Nicked area is near the edge of the plastic and spreading inward

    • White powdered glass is often seen in a chipped area

    • Visibility through the nicked area is slight

    • Chipped area has a smooth appearance

    Correct Answer
    A. White powdered glass is often seen in a chipped area
    Explanation
    When performing a visual inspection on nicked plastic assemblies, you are looking for white powdered glass in a chipped area. This suggests that the plastic has been damaged and there may be a risk of further spreading or deterioration. The presence of white powdered glass indicates that the plastic has been chipped or cracked, potentially compromising its structural integrity. This visual cue helps identify areas that may require repair or replacement to ensure the overall quality and safety of the plastic assemblies.

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  • 11. 

    (603) When inspecting for distortions, besides excellent lighting what else do you use?

    • A grid made up of horizontal and vertical lines

    • Viewing lines through panel at a distance of at least 40ft away

    • A dark background placed outside of the panel while viewing from inside

    • A dark grid made up of parallel curved lines of varying lengths and thicknesses

    Correct Answer
    A. A grid made up of horizontal and vertical lines
    Explanation
    To inspect for distortions, a grid made up of horizontal and vertical lines is used. This grid helps to identify any irregularities or deformities in the object being inspected. By comparing the lines of the grid to the lines of the object, any distortions or deviations from the expected shape can be easily detected. The grid provides a reference point for assessing the accuracy and integrity of the object's structure.

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  • 12. 

    (604) When classifying damage to a composite structure, a puncture of a fiberglass panel that extends through one facing is which classification?

    • Repairable.

    • Class III

    • Class II.

    • Class I.

    Correct Answer
    A. Class II.
    Explanation
    A puncture of a fiberglass panel that extends through one facing is classified as Class II damage. Class II damage refers to damage that can be repaired without compromising the structural integrity of the composite structure. This means that the puncture can be fixed and the panel can still function properly without any significant loss of strength or performance.

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  • 13. 

    (604) When is it acceptable to have bubbles on a plastic window?

    • Bubbles are never acceptable

    • They only impair vision along the edges of the panel.

    • They are well scattered and within acceptable number, diameter and spacing

    • They do not impair vision, are well scattered and within the limitations of the TO.

    Correct Answer
    A. They do not impair vision, are well scattered and within the limitations of the TO.
  • 14. 

    (605) According to the basic principle of repair, when you make any repair your main concern is the original

    • Strength.

    • Contour.

    • Stresses.

    • Weight.

    Correct Answer
    A. Strength.
    Explanation
    When making a repair, the main concern is to restore the original strength of the object or structure. This means ensuring that the repaired area is as strong as it was before the damage occurred. By focusing on strength, the repair will be able to withstand the same forces and stresses as the original, maintaining the overall integrity and functionality of the object.

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  • 15. 

    (605) Before fastening the doubler and filler together for a flush repair, the repair parts must be

    • Filled in with aerodynamic smoothing compound

    • Curved to the precise contour of the repair area

    • Cut into a circular repair patch

    • Replaced as soon as practical

    Correct Answer
    A. Curved to the precise contour of the repair area
    Explanation
    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 because the repair area needs to be properly aligned and shaped in order to ensure a flush and seamless repair. Curving the repair parts to the precise contour of the repair area helps to achieve this alignment and ensures that the repaired section blends in smoothly with the surrounding structure.

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  • 16. 

    (606) When repairing damage to an aircraft, the first step in removing the damaged area is to determine

    • How much undamaged area should be removed

    • If the damage is near a sub-structural member.

    • If the damage is in an open area.

    • The final size of the patch.

    Correct Answer
    A. How much undamaged area should be removed
    Explanation
    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 completely removed and replaced with new, undamaged material. Removing the appropriate amount of undamaged area also helps to maintain the structural integrity of the aircraft and prevent any further damage or issues in the future.

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  • 17. 

    (606) When you’re preparing a cutout for an “open area,” you remove all damage and

    • Stop-drill all cracks.

    • Relieve stress concentrations.

    • Make sure the cutout is centered over a sub-structural member.

    • Anneal the cutout areas so the area is not work-hardened during the cutout operation.

    Correct Answer
    A. Relieve stress concentrations.
    Explanation
    When preparing a cutout for an "open area," the correct step is to relieve stress concentrations. This involves removing any damage and stop-drilling all cracks to prevent them from spreading further. By relieving stress concentrations, the structural integrity of the cutout area is improved, reducing the risk of further damage or failure. This step is crucial to ensure the safety and longevity of the structure.

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  • 18. 

    (606) What factors do you consider when selecting a twist drill to use for chain-drilling removal techniques?

    • Size and location of the cutout area

    • Diameter and head style of repair fasteners

    • Material composition and thickness of the cutout area

    • Location of existing fasteners within and outside the cutout area

    Correct Answer
    A. Material composition and thickness of the cutout area
    Explanation
    When selecting a twist drill for chain-drilling removal techniques, it is important to consider the material composition and thickness of the cutout area. This is because different materials may require different types of drill bits, and the thickness of the cutout area will determine the length of the drill bit needed. Choosing the appropriate drill bit based on these factors will ensure efficient and effective removal of the material.

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  • 19. 

    (606) You must consider the location of any existing fasteners near a damaged area when determining the

    • Overall size of the cutout

    • Material thickness of the repair parts

    • Number of fasteners required for the repair

    • Classification of the repair to be accomplished

    Correct Answer
    A. Overall size of the cutout
    Explanation
    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 sized in a way that avoids interfering with or compromising the integrity of these fasteners. By taking into account the location of existing fasteners, the overall size of the cutout can be determined in a manner that ensures proper repair and structural stability.

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  • 20. 

    (606) An angle drill is used to remove damage when

    • The damage is in a limited space

    • The skin and sub-structural damage cutout are the same

    • The skin and sub-structural damage cutout are not the same

    • Only the skin is damaged and the sub-structural member is intact

    Correct Answer
    A. The damage is in a limited space
    Explanation
    An angle drill is used to remove damage when the damage is in a limited space. This is because an angle drill is designed with a compact and angled shape that allows it to access tight and confined areas where a regular drill cannot reach. Therefore, it is the ideal tool to use when the damage is located in a limited space that requires a specialized drilling tool for repair or removal.

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  • 21. 

    (607) Before you develop a rivet layout for a circular flush repair, you must first establish the

    • Center point of the cutout area.

    • Head style of the rivets to be used

    • Rivet spacing required on the filler plate

    • Direction of the stress concentrations within the part being repaired

    Correct Answer
    A. Center point of the cutout area.
    Explanation
    Before developing a rivet layout for a circular flush repair, it is important to first 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 distributed around the repair area. Without determining the center point accurately, the rivet layout may be incorrect, leading to potential issues with the repair and compromising the structural integrity of the part. Therefore, establishing the center point is a crucial step in developing an effective rivet layout for a circular flush repair.

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  • 22. 

    (607) If the location of the rivets on the inner and outer rows of a layout pattern on a square flush patch are the same then the

    • Wrong measurements were used to develop the rivet pattern

    • Rivet spacing and row spacing are identical

    • Doubler is twice the size of the filler plate

    • Edge distance is beyond acceptable limits

    Correct Answer
    A. Rivet spacing and row spacing are identical
    Explanation
    The given 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 in the layout pattern are the same. This is important for ensuring the structural integrity of the flush patch. If the rivet spacing and row spacing were different, it could lead to uneven distribution of forces and potentially weaken the patch. Therefore, it is crucial for the rivet spacing and row spacing to be identical in order to maintain the desired strength and stability of the patch.

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  • 23. 

    (607) Which layout procedure is very important when developing a rivet pattern for a flush skin repair over a substructural member?

    • Locating the centerline of the cutout area to use as a starting point

    • Measuring edge distance from the outer edges of the substructural member

    • Determining the edge distance requirements for the different head styles of the rivets

    • Placing the lengths of rivets required in the repair because of the substructural member

    Correct Answer
    A. Measuring edge distance from the outer edges of the substructural member
    Explanation
    When developing a rivet pattern for a flush skin repair over a substructural member, measuring edge distance from the outer edges of the substructural member is very important. Edge distance refers to the distance between the edge of the rivet hole and the edge of the material being riveted. It is crucial to ensure that the edge distance is sufficient to maintain the structural integrity of the repair. By measuring the edge distance from the outer edges of the substructural member, the proper spacing and placement of the rivets can be determined, ensuring a secure and effective repair.

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  • 24. 

    (607) To properly develop a rivet pattern for a flush skin repair across a substructural member, the rivet spacing used for calculating the row spacing is the

    • Existing rivet spacing for the fasteners in the substructural member

    • Smallest rivet spacing available regardless of where the cutout area is located

    • Strongest rivet spacing possible based on the diameter of the rivets used in the repair

    • Rivet spacing used on one side of the cutout, opposite the width of the substructural member

    Correct Answer
    A. Rivet spacing used on one side of the cutout, opposite the width of the substructural member
    Explanation
    The rivet spacing used on one side of the cutout, opposite the width of the substructural member, is the correct answer because when developing a rivet pattern for a flush skin repair, it is important to maintain the structural integrity of the substructural member. By using the rivet spacing on one side of the cutout, opposite the width of the substructural member, the load distribution and strength of the repair can be maximized. This ensures that the repair is secure and able to withstand the required forces.

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  • 25. 

    (608) When fabricating a doubler for a flush skin repair in an open area

    • Select material that is one-gage thicker than the skin

    • Position the doubler material inside the cutout

    • Develop a fastener layout on the patch plate

    • Split the doubler into two parts.

    Correct Answer
    A. Select material that is one-gage thicker than the skin
    Explanation
    When fabricating a doubler for a flush skin repair in an open area, it is important to select material that is one-gage thicker than the skin. This is because the doubler is used to reinforce the damaged area and provide additional strength. By using material that is one-gage thicker, it ensures that the doubler will be able to effectively support the skin and distribute any loads or stresses. This helps to prevent further damage and ensures a strong and durable repair.

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  • 26. 

    (608) When fabricating a filler plate for a flush skin repair in an open area, you determine the overall dimensions of the filler by

    • Using the cutout area as a template

    • Using the dimensions of a previously installed flush repair

    • Measuring the damaged area before making the skin cutout

    • Multiplying the length of the damage by the width of the damage, and adding the edge distance requirements

    Correct Answer
    A. Using the cutout area as a template
    Explanation
    When fabricating a filler plate for a flush skin repair in an open area, using the cutout area as a template is the correct method. This means that the dimensions of the filler plate should match the dimensions of the cutout area that was removed from the damaged skin. By using the cutout area as a template, the filler plate will fit perfectly into the open area, ensuring a flush repair. This method is commonly used to ensure accuracy and to avoid any discrepancies in the dimensions of the filler plate.

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  • 27. 

    (608) In which situation is a fastener layout more than likely done on the patch instead of the repair part?

    • Open area with existing fasteners.

    • Blind area with existing fasteners.

    • Open area with no existing fasteners.

    • Blind area with no existing fasteners

    Correct Answer
    A. Blind area with no existing fasteners
    Explanation
    In a blind area with no existing fasteners, it is more likely that a fastener layout would be done on the patch rather than the repair part. This is because in a blind area, it may be difficult to access or reach the repair part directly. Therefore, it would be more practical and efficient to install the fasteners on the patch itself, which can then be attached to the repair part in the blind area.

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  • 28. 

    (608) In addition to the amount of damage to each member, what other factor must you consider when determining the size of the cutout for a combination repair?

    • Type of cutting tools to use

    • Location of existing fasteners

    • Thickness of the parts being repaired

    • Material composition of the damage parts

    Correct Answer
    A. Location of existing fasteners
    Explanation
    When determining the size of the cutout for a combination repair, one must consider the location of existing fasteners. This is because the cutout needs to be positioned in a way that avoids interfering with any existing fasteners, such as bolts or screws, that are already in place. Failure to consider the location of existing fasteners could result in damage to them or difficulties in reattaching them after the repair is completed.

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  • 29. 

    (609) As it applies to the installation of repair parts, what is a primer and when is it applied?

    • Cleaning solvent; applied before painting

    • Precleaning agent; applied before using an approved solvent

    • Corrosion preventative; applied before the installation of repair parts.

    • Bonding agent; applied on repair parts to provide a base for a corrosion preventative

    Correct Answer
    A. Corrosion preventative; applied before the installation of repair parts.
    Explanation
    A primer is a type of corrosion preventative that is applied before the installation of repair parts. Its purpose is to provide a protective coating to prevent corrosion from occurring on the repaired area. By applying the primer before installing the repair parts, it helps to ensure that the repaired area is adequately protected against corrosion, extending the lifespan of the repair and preventing further damage.

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  • 30. 

    (609) Before applying an aerodynamic smoothing compound to repair seams

    • Smooth the edges with sandpaper

    • Clean the area with distilled water

    • Smooth the edges with a rotary file.

    • Clean the area with an approved solvent

    Correct Answer
    A. Clean the area with an approved solvent
    Explanation
    Before applying an aerodynamic smoothing compound to repair seams, it is necessary to clean the area with an approved solvent. This is important because the solvent helps to remove any dirt, grease, or other contaminants that may be present on the surface. By cleaning the area thoroughly, the smoothing compound can adhere properly and provide a smooth and seamless repair.

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  • 31. 

    (609) The method you use to remove excess aerodynamic smoothing compound from seams depends on the

    • Hardness of the material sealed

    • Hardness of the compound surface

    • Amount of heat used to cure the compound

    • Temperature and relative humidity at the time the compound was applied

    Correct Answer
    A. Hardness of the compound surface
    Explanation
    The correct answer is the hardness of the compound surface. The method used to remove excess aerodynamic smoothing compound from seams will depend on the hardness of the compound surface. If the compound surface is hard, a scraping or sanding method may be used. If the compound surface is soft, a solvent or chemical method may be more appropriate. The hardness of the compound surface will determine the most effective and efficient method for removing excess compound.

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  • 32. 

    (610) When welding thermocouples follow the

    • Equipment manufacturer’s instructions

    • Technical Order (TO) 1–1–690

    • Thermocouple manual

    • Aircraft specific TO

    Correct Answer
    A. Equipment manufacturer’s instructions
    Explanation
    The correct answer is "equipment manufacturer’s instructions." This is because when welding thermocouples, it is important to follow the instructions provided by the equipment manufacturer. These instructions are specific to the welding equipment being used and ensure that the thermocouples are welded correctly and safely. Following the manufacturer's instructions also helps to maintain the integrity and functionality of the thermocouples.

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  • 33. 

    (611) When performing a routing operation on a tapered surface, the minimum length of the required wedge blocks is

    • 3"

    • 4"

    • 5"

    • 6"

    Correct Answer
    A. 6"
    Explanation
    When performing a routing operation on a tapered surface, the minimum length of the required wedge blocks is 6". This is because the tapered surface requires a longer block to ensure stability and proper support for the routing operation. A shorter block may not provide enough contact area with the surface, leading to instability and potential errors in the routing process. Therefore, a 6" block is necessary to ensure the routing operation is performed accurately and safely.

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  • 34. 

    (611) When drilling aramid composite materials, how can you minimize fiber fuzz?

    • Use a dagger spade or brad point bit

    • Use a high speed, low-feed when drilling

    • Use a Carbide or diamond-coated drill bit

    • Use a split helix bit with either two or four helical flutes

    Correct Answer
    A. Use a dagger spade or brad point bit
    Explanation
    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 that helps to penetrate the material cleanly without causing excessive damage to the fibers. They also have a flat cutting edge that helps to create clean holes without fraying or fuzzing the fibers. Using these types of drill bits reduces the likelihood of fiber damage and ensures a neater and more precise drilling result.

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  • 35. 

    (612) What cardinal rule must be followed when removing damage from a composite structure?

    • Remove a minimum of sound material

    • Make the cutout to a round configuration

    • Use the scarf method to make an oval cutout

    • Use the step-joint method to make a square cutout

    Correct Answer
    A. Remove a minimum of sound material
    Explanation
    When removing damage from a composite structure, it is important to remove a minimum of sound material. This means that only the damaged or compromised areas should be removed, while preserving as much of the intact structure as possible. This helps to maintain the structural integrity of the composite and minimize the loss of strength or stability. Removing a minimum of sound material also reduces the amount of repair work needed and ensures that the repaired structure remains as close to its original design as possible.

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  • 36. 

    (612) What is your first step when fabricating a patch for a composite repair?

    • Create a patch drawing

    • Make a cutting template

    • Layout a stacking template

    • Draw orientation lines on the repair patch

    Correct Answer
    A. Create a patch drawing
    Explanation
    The first step when fabricating a patch for a composite repair is to create a patch drawing. This involves sketching out the dimensions and shape of the patch that will be used for the repair. By creating a patch drawing, you can ensure that the patch will fit properly and accurately address the damaged area. This step is crucial in the fabrication process as it provides a blueprint for the rest of the repair work.

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  • 37. 

    (613) When selecting a resin to repair laminated fiberglass assemblies, what must you know besides the method of curing?

    • Overall size of repair

    • Number of plies being replaced

    • Resin used by the manufacturer

    • Curvature of the area being repaired

    Correct Answer
    A. Resin used by the manufacturer
    Explanation
    When selecting a resin to repair laminated fiberglass assemblies, it is important to know the resin used by the manufacturer. This is because using a different resin may not provide the same level of adhesion and compatibility with the existing fiberglass. Using the same resin ensures that the repair will be strong and durable, and that the repaired area will blend in seamlessly with the rest of the assembly.

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  • 38. 

    (614) To provide a more uniform bondline thickness when making a metal-bonded honeycomb repair, you use a

    • Film adhesive

    • Foam adhesive

    • Paste adhesive

    • Liquid adhesive

    Correct Answer
    A. Film adhesive
    Explanation
    A film adhesive is used to provide a more uniform bondline thickness when making a metal-bonded honeycomb repair. This is because film adhesives are typically thin and can be easily applied in a consistent manner, resulting in a uniform thickness across the bondline. Foam adhesives, paste adhesives, and liquid adhesives may be more difficult to apply evenly, leading to variations in bondline thickness. Therefore, a film adhesive is the most suitable option for achieving a uniform bondline thickness in this scenario.

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  • 39. 

    (614) How do paste adhesives compare with other types as far as strength is concerned?

    • Lower in strength

    • Higher in strength

    • Lower in strength only when the paste adhesive is a two-part mixture.

    • Higher in strength only when the paste adhesive is a two part mixture

    Correct Answer
    A. Lower in strength
    Explanation
    Paste adhesives are generally lower in strength compared to other types of adhesives. This means that they may not provide as strong of a bond as other types of adhesives. However, it is important to note that this statement is true only when the paste adhesive is not a two-part mixture. If the paste adhesive is a two-part mixture, it can have higher strength compared to other types of adhesives.

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  • 40. 

    (615) When storing advanced composite materials in cold storage, what is the maximum temperature permitted?

    • 0ºF

    • 32ºF

    • 60ºF

    • 72ºF

    Correct Answer
    A. 0ºF
    Explanation
    Composite materials are made up of multiple components, such as fibers and resins, that are combined to create a strong and lightweight material. These materials are often sensitive to temperature changes and can degrade if exposed to high temperatures. Storing composite materials in cold storage helps to maintain their integrity and prevent any damage. The maximum temperature permitted for storing advanced composite materials in cold storage is 0ºF. This extremely low temperature ensures that the materials remain stable and do not experience any degradation or loss of properties.

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  • 41. 

    (616) How do you apply uniform pressure to laminated fiberglass repairs?

    • C-clamps.

    • Pressure tape

    • Pressure plates

    • Vacuum pressure

    Correct Answer
    A. Vacuum pressure
    Explanation
    To apply uniform pressure to laminated fiberglass repairs, vacuum pressure is used. This method involves creating a vacuum seal around the repair area using a vacuum bag or similar device. The vacuum removes air from the area, causing the bag to press tightly against the repair, applying even pressure. This ensures that the fiberglass layers are properly bonded and eliminates any air bubbles or inconsistencies. Vacuum pressure is an effective and efficient method for achieving a uniform pressure during laminated fiberglass repairs.

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  • 42. 

    (617) When making a step-joint repair to an aramid honeycomb composite panel, you make the replacement plies

    • At right angles to each ply in the original panel

    • To match each ply in the original panel

    • At 30° to each ply in the original panel.

    • At 45° to each ply in the original panel

    Correct Answer
    A. To match each ply in the original panel
    Explanation
    When making a step-joint repair to an aramid honeycomb composite panel, the replacement plies should be made to match each ply in the original panel. This means that the orientation and alignment of the replacement plies should be the same as the plies in the original panel. By matching each ply, the repair will be seamless and the structural integrity of the composite panel will be maintained.

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  • 43. 

    (617) What procedure is used in a step-joint removal method?

    • Fit the innermost patch (largest) to the area first

    • The first ply is cut so at least ½″ overlaps the inner edges

    • The first ply is cut so at least ¼″ overlaps the outer edges

    • The edges of the patch are butted to the existing bond ply

    Correct Answer
    A. The edges of the patch are butted to the existing bond ply
    Explanation
    In a step-joint removal method, the edges of the patch are butted to the existing bond ply. This means that the patch is placed directly against the existing bond ply without any overlap. This procedure ensures a tight and secure fit between the patch and the existing bond ply, creating a strong and reliable joint.

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  • 44. 

    (617) What is the first step in a scarf repair?

    • Find the center point of the damage

    • Remove the top damaged ply

    • Find the edges of the damage

    • Remove any paint

    Correct Answer
    A. Remove any paint
    Explanation
    In scarf repair, the first step is to remove any paint from the damaged area. This is important because paint can hinder the repair process and prevent proper adhesion of the materials used for repair. By removing the paint, the damaged area can be properly assessed and prepared for the next steps of the repair process.

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  • 45. 

    (618) When drilling holes in a delaminated area of a metal-bonded honeycomb panel for injecting adhesive,

    • Pilot-drill all holes to avoid drilling into cells walls

    • Step-drill all holes to ensure proper adhesive injection

    • Drill holes first at the top and bottom of the delaminated area

    • Drill deep enough into the core material to permit the adhesive flow to remove any moisture present.

    Correct Answer
    A. Drill holes first at the top and bottom of the delaminated area
    Explanation
    When drilling holes in a delaminated area of a metal-bonded honeycomb panel for injecting adhesive, it is important to drill holes first at the top and bottom of the delaminated area. This ensures that the adhesive can flow effectively throughout the entire delaminated area, allowing for proper bonding and repair. By starting at the top and bottom, the adhesive can evenly distribute and fill any gaps or voids within the delaminated area, resulting in a stronger and more secure bond.

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  • 46. 

    (618) What step must be taken when doing a partial-through repair that is not done on a full core replacement repair?

    • Install a 0.010″ aluminum sheet shim

    • Cut the replacement core larger than the cutout

    • Cut one disk of adhesive film to the size of the cutout

    • Ensure the overlap of the patch plate is a minimum of 2″.

    Correct Answer
    A. Install a 0.010″ aluminum sheet shim
    Explanation
    When doing a partial-through repair that is not done on a full core replacement repair, it is necessary to install a 0.010" aluminum sheet shim. This shim helps to provide additional support and stability to the repair, ensuring that it is properly aligned and secure. The shim fills any gaps or uneven areas between the repaired section and the surrounding structure, helping to distribute the load evenly and prevent any potential issues or damage. By installing the aluminum sheet shim, the integrity and strength of the repair are enhanced, making it a crucial step in the partial-through repair process.

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  • 47. 

    (619) How many thermocouples are used and how are they positioned on a wet laminate when removing moisture?

    • One; 2″ from the edge of the heat blanket

    • Two; 2″ from the edge of the heat blanket.

    • Three; equally spaced around the damaged area.

    • Four; equally spaced around the damaged area

    Correct Answer
    A. Two; 2″ from the edge of the heat blanket.
    Explanation
    The correct answer is Two; 2" from the edge of the heat blanket. This means that when removing moisture from a wet laminate, two thermocouples are used and they are positioned 2" away from the edge of the heat blanket. The positioning of the thermocouples ensures that the heat is evenly distributed and the moisture is effectively removed from the damaged area.

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  • 48. 

    (619) How do you determine if water has been removed or has migrated to another location when removing moisture from a honeycomb composite panel?

    • Use a tap hammer

    • Visually inspect area

    • Re-inspect area using a borescope

    • Re-inspect area using nondestructive inspection (NDI).

    Correct Answer
    A. Re-inspect area using nondestructive inspection (NDI).
    Explanation
    To determine if water has been removed or has migrated to another location when removing moisture from a honeycomb composite panel, it is necessary to re-inspect the area using nondestructive inspection (NDI). This method allows for a thorough examination of the panel without causing any damage. NDI techniques such as ultrasound or thermal imaging can be used to detect any remaining moisture or water migration within the panel. These techniques provide a reliable and accurate assessment of the moisture content in the honeycomb composite panel.

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  • 49. 

    (620) What important factor must be known before polishing out a scratch on an acrylic assembly?

    • If any distortion caused by the scratch will be removed when the scratch is removed

    • The thickness the acrylic plastic assembly will be after polishing

    • If the assembly can be annealed after the polishing operation

    • The exact width of the scratch

    Correct Answer
    A. The thickness the acrylic plastic assembly will be after polishing
    Explanation
    Before polishing out a scratch on an acrylic assembly, it is important to know the thickness the acrylic plastic assembly will be after polishing. This is crucial because polishing the scratch may remove some material from the surface, potentially affecting the overall thickness of the assembly. By knowing the final thickness, one can ensure that the assembly will still meet the required specifications and function properly.

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Quiz Review Timeline (Updated): Mar 21, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 14, 2017
    Quiz Created by
    Jbesrod

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