2A753 Volume 3 Structural Maintenance Journeyman

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  • 1/75 Questions

    (401) When you are installing aircraft bolts in a panel you place shims under the plate nut?

    • Because the grip length of the bolt is slightly greater
    • To make the bottom portion of the plate nut stronger
    • Because material thickness being bolted together is less than the diameter of the bolt
    • Because thread protrusion through the plate nut is more than the required two threads
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2A753 Quizzes & Trivia
About This Quiz

This quiz assesses knowledge in structural maintenance for aircraft, focusing on the installation and removal of fasteners and bolts. It is designed for journeyman level and tests practical skills vital for ensuring aircraft integrity and safety.

Quiz Preview

  • 2. 

    (401) How can you avoid stripping threads when installing a nut and bolt?

    • Choose the proper nut

    • Install washers as necessary.

    • Torque the nut to proper specifications

    • Ensure the bolt has a proper interference fit

    Correct Answer
    A. Torque the nut to proper specifications
    Explanation
    To avoid stripping threads when installing a nut and bolt, it is important to torque the nut to proper specifications. Torque refers to the amount of force applied to tighten the nut and bolt. If the nut is not tightened enough, it may become loose and cause the threads to strip. On the other hand, if the nut is overtightened, it can also damage the threads. Therefore, following the recommended torque specifications ensures that the nut is tightened to the appropriate level, reducing the risk of thread stripping.

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  • 3. 

    (402) The fastener removal tool is primarily designed for use on a

    • Concave surface

    • Convex surface

    • Curved surface

    • Flat surface

    Correct Answer
    A. Flat surface
    Explanation
    The fastener removal tool is primarily designed for use on a flat surface because it requires a stable and even surface to effectively remove fasteners. A flat surface ensures that the tool can be applied with equal pressure and prevents any potential damage or slipping that may occur on uneven or curved surfaces.

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  • 4. 

    (402) The most you should turn a screw with a screw punch tool is

    • One-eighth (⅛) turn

    • One-quarter (¼) turn

    • Three-eighths (3/8) turn.

    • One-half (½) turn

    Correct Answer
    A. One-quarter (¼) turn
    Explanation
    The correct answer is one-quarter (¼) turn. This is because turning a screw with a screw punch tool more than one-quarter turn can cause damage to the screw or the material it is being screwed into. It is important to only turn the screw the necessary amount to secure it properly without causing any harm.

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  • 5. 

    (403) What nut style do you use when all bolt hole locations are equally spaced around an opening?

    • Point wrenching

    • Nut plates

    • Channel.

    • Barrel.

    Correct Answer
    A. Channel.
    Explanation
    When all bolt hole locations are equally spaced around an opening, the nut style that is typically used is called a channel. A channel nut has a long, rectangular shape with threaded holes along its length. It is designed to fit into a channel or track and can be easily adjusted and positioned to align with the bolt holes. This allows for a secure and evenly distributed connection between the nut and the bolts.

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  • 6. 

    (403) Which nut is used where the assembly is frequently removed and you can obtain the desired tightness with your fingers?

    • Wing

    • Castle

    • Plain text

    • Catellated shear

    Correct Answer
    A. Wing
    Explanation
    The wing nut is used in assemblies that are frequently removed because it allows for easy tightening and loosening by hand. Its design with two large wings on opposite sides provides a larger surface area for gripping, allowing for quick and convenient adjustments without the need for tools. This makes it ideal for applications where the assembly needs to be frequently disassembled and reassembled.

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  • 7. 

    (403) The two major types of self-locking nuts you will install are

    • Floating and non floating

    • Aluminum and stainless steel

    • Interrupted thread and elastic stop

    • Prevailing torque and free spinning

    Correct Answer
    A. Prevailing torque and free spinning
    Explanation
    The correct answer is prevailing torque and free spinning. Prevailing torque nuts are designed to provide resistance to loosening caused by vibration or other external forces. They have a built-in mechanism that increases the friction between the nut and the bolt, ensuring that it stays securely in place. Free spinning nuts, on the other hand, allow for easy installation and removal without any resistance or friction. They are commonly used in applications where frequent disassembly is required.

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  • 8. 

    (403) You need to consider heat requirements for which prevailing torque, self-locking nut locking device?

    • Slotted or beam

    • Nonmetallic insert.

    • Deformed thread type

    • Interrupted thread type

    Correct Answer
    A. Nonmetallic insert.
    Explanation
    The correct answer is Nonmetallic insert. Nonmetallic inserts are used as a prevailing torque, self-locking nut locking device to provide resistance against loosening due to vibration or thermal expansion. These inserts are made of materials such as nylon or plastic, which have low thermal conductivity and can withstand high temperatures. They create friction between the nut and the bolt, preventing the nut from rotating and maintaining the desired level of torque. This ensures that the nut remains securely locked in place, even in high-heat environments where metal inserts may fail.

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  • 9. 

    (404) When a rigid type camloc receptacle needs to replaced you replace

    • It with a rigid receptacle

    • It with a floating receptacle

    • It with a retaining receptacle

    • The entire camloc fastener assembly

    Correct Answer
    A. It with a floating receptacle
    Explanation
    When a rigid type camloc receptacle needs to be replaced, it should be replaced with a floating receptacle. This is because a floating receptacle allows for slight movement or misalignment between the mating parts, providing flexibility. This flexibility helps to prevent stress and damage to the fastener assembly and ensures proper functioning of the camloc mechanism. Replacing it with a rigid receptacle or a retaining receptacle may result in limited movement or misalignment issues, leading to potential damage or failure of the fastener assembly. Replacing the entire camloc fastener assembly may not be necessary if only the receptacle needs to be replaced.

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  • 10. 

    (404) What is the final step that completes a camloc fastener assembly installation?

    • Install the receptacle.

    • Install the stud retaining ring

    • Check the grip length of the stud

    • Insert the stud assembly into the grommet

    Correct Answer
    A. Check the grip length of the stud
    Explanation
    The final step that completes a camloc fastener assembly installation is to check the grip length of the stud. This is important to ensure that the stud is securely fastened and properly aligned with the receptacle. By checking the grip length, any adjustments or modifications can be made to ensure the stud is in the correct position and the fastener assembly is properly installed.

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  • 11. 

    (405) To properly install a new flush-type airloc turn-lock fastener, the size of the punched hole in the access panel should be

    • 1/16 inch larger than the stud

    • 1/16 inch smaller than the stud.

    • Equal to the diameter of the stud head.

    • Approximately the same size as the diameter of the stud shank.

    Correct Answer
    A. Approximately the same size as the diameter of the stud shank.
    Explanation
    To properly install a new flush-type airloc turn-lock fastener, the size of the punched hole in the access panel should be approximately the same size as the diameter of the stud shank. This is because the stud shank needs to fit snugly into the hole in order to securely hold the fastener in place. If the hole is too small, it will be difficult to insert the stud, and if it is too large, the fastener may not be securely fastened. Therefore, the best option is to have the hole approximately the same size as the diameter of the stud shank.

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  • 12. 

    (405) What part of an airloc assembly is never reused?

    • Grommet.

    • Cross-pin.

    • Rigid receptacle

    • Floating receptacle.

    Correct Answer
    A. Cross-pin.
    Explanation
    The correct answer is cross-pin because a cross-pin is a type of fastener that is designed to be permanently installed and not intended for reuse. Unlike other parts of an airlock assembly such as grommets, rigid receptacles, and floating receptacles, a cross-pin is not meant to be removed or replaced once it has been installed. Therefore, it is the only part that is never reused in an airlock assembly.

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  • 13. 

    (406) When drilling holes for fasteners you can maintain proper hole alignment by

    • Using a reamer to up size the hole

    • Clamping all repair members in place

    • Holding the drill at a right angle to the surface

    • Pilot drilling holes through all mating surfaces

    Correct Answer
    A. Clamping all repair members in place
    Explanation
    Clamping all repair members in place is the correct answer because it ensures that the pieces being drilled are securely held together. This prevents any movement or misalignment during the drilling process, resulting in proper hole alignment. Using a reamer to upsize the hole, holding the drill at a right angle to the surface, and pilot drilling holes through all mating surfaces may be important steps in the drilling process, but they do not specifically address maintaining proper hole alignment.

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  • 14. 

    (406) How do you drill an interference fit hole for a fastener?

    • Use only a reamer to finish the holeburrs.

    • Use only a drill bit to drill the hole to size

    • Pilot drill the hole and use a reamer to finish

    • Pilot drill the hole and use a drill bit to upsize.

    Correct Answer
    A. Pilot drill the hole and use a reamer to finish
    Explanation
    Piloting the hole and using a reamer to finish is the correct method for drilling an interference fit hole for a fastener. This process involves first drilling a smaller pilot hole to guide the larger reamer. The reamer is then used to enlarge and smooth out the hole to the desired size and finish. This method ensures accuracy and precision in creating an interference fit, where the fastener is tightly secured in the hole without any gaps or play. Using only a reamer or only a drill bit may not provide the same level of precision and control in achieving the desired fit.

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  • 15. 

    (407) When cold working a hole, which gage is used to verify the hole before and after it’s been cold-worked?

    • Final.

    • Starting.

    • Verification.

    • Combination.

    Correct Answer
    A. Combination.
    Explanation
    When cold working a hole, a combination gage is used to verify the hole before and after it has been cold-worked. A combination gage typically consists of a go/no-go gauge, which is used to check the size and shape of the hole, and a depth gauge, which is used to measure the depth of the hole. By using a combination gage, the operator can ensure that the hole meets the required specifications both before and after the cold working process.

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  • 16. 

    (408) In determining the grip length of a hi-shear rivet, when it is installed in the hole the straight portion of the shank should

    • Be flush with the top of the locking collar

    • Extend no more than 1/16 inch through the material

    • Be flush with the back edge of the material thickness

    • Extend at least 1/16 inch beyond the top edge of the locking collar

    Correct Answer
    A. Extend no more than 1/16 inch through the material
    Explanation
    The correct answer is "extend no more than 1/16 inch through the material." This means that when the hi-shear rivet is installed in the hole, the straight portion of the shank should not protrude more than 1/16 inch beyond the material. This is important to ensure that the rivet is properly secured and provides a strong connection without excessive protrusion that could interfere with other components or create a hazard.

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  • 17. 

    (408) When installing hi-shear rivets how do you accomplish proper faying surface “sealant squeeze out”?

    • Swaging the collar with an undersized swaging set

    • Increasing the hammering force needed to swage the collar

    • Installing temporary fasteners in every other hole before installation

    • Lightly tapping the hi-shear rivet pin into the hole before swaging the collar

    Correct Answer
    A. Installing temporary fasteners in every other hole before installation
  • 18. 

    (407) Cold-working hole expansion is used to prevent

    • Burrs.

    • Cracks.

    • Elongated holes

    • Premature fatigue failure

    Correct Answer
    A. Premature fatigue failure
    Explanation
    Cold-working hole expansion is a process that involves enlarging a hole by compressing the material around it. This compressive force helps to improve the fatigue strength of the hole, making it less prone to premature fatigue failure. By cold-working the hole, the material is strengthened and any potential stress concentrations or defects are mitigated, reducing the likelihood of fatigue failure. Therefore, cold-working hole expansion is used as a preventive measure against premature fatigue failure.

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  • 19. 

    (409) What is the maximum surface angle on which you can satisfactorily drive a stump lock-bolt collar?

    • 5° parallel with the axis of the hole.

    • 7° parallel with the axis of the hole.

    • 5° perpendicular with the axis of the hole.

    • 7° perpendicular with the axis of the hole.

    Correct Answer
    A. 7° perpendicular with the axis of the hole.
    Explanation
    The maximum surface angle on which you can satisfactorily drive a stump lock-bolt collar is 7° perpendicular with the axis of the hole. This means that the collar should be driven into the surface at a 7° angle relative to the axis of the hole. Driving the collar perpendicular to the axis of the hole ensures a secure and stable fit, preventing any potential movement or loosening of the collar.

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  • 20. 

    (409) The last step after installing pull-type lock bolts is to                

    • Inspect the formation of the collar

    • Remove the pulling gun from the collar area

    • Ensure the end of the pin is flush with the end of the collar

    • Apply a corrosion preventative compound to the stem break off area

    Correct Answer
    A. Apply a corrosion preventative compound to the stem break off area
    Explanation
    After installing pull-type lock bolts, the last step is to apply a corrosion preventative compound to the stem break off area. This is important to protect the bolt from corrosion, which can weaken its strength and durability over time. By applying the compound, it creates a barrier that prevents moisture and other corrosive elements from reaching the break off area of the bolt, ensuring its long-term performance and reliability.

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  • 21. 

    (410) What material composition hi-lok fastener is used when the temperature of a certain area of the aircraft exceeds 750°F?

    • Inconel

    • Titanium alloy

    • Corrosion-resistant steel

    • High-strength aluminum alloy

    Correct Answer
    A. Corrosion-resistant steel
    Explanation
    Corrosion-resistant steel is used when the temperature of a certain area of the aircraft exceeds 750°F. This material composition is chosen because it can withstand high temperatures without losing its structural integrity and is also resistant to corrosion, which is important for maintaining the safety and longevity of the aircraft.

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  • 22. 

    (411) What head marking symbols on the taper-lok pins indicate that it is an injection type?

    • The letters IT in front of the TL symbol

    • The letters IT before the first dash number.

    • Indented slots stamped on the head of the fastener

    • The numbers representing the type of sealant required.

    Correct Answer
    A. Indented slots stamped on the head of the fastener
    Explanation
    Indented slots stamped on the head of the fastener indicate that it is an injection type taper-lok pin.

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  • 23. 

    (411) The symbol on the bottom of a taper-lok pin represents the

    • Grip length

    • Fastener diameter

    • Material composition

    • Threads per inch on the pin

    Correct Answer
    A. Grip length
    Explanation
    The symbol on the bottom of a taper-lok pin represents the grip length. The grip length refers to the portion of the pin that is designed to securely hold and grip the materials being fastened together. This symbol provides important information about the length of the grip, allowing users to ensure that the pin is properly installed and will provide the necessary strength and stability for the application.

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  • 24. 

    (411) The second dash number stamped on the head of a taper-lok fastener pin represents the

    • Grip length

    • Fastener diameter

    • Material composition

    • Depth of the injector ports

    Correct Answer
    A. Depth of the injector ports
    Explanation
    The second dash number stamped on the head of a taper-lok fastener pin represents the depth of the injector ports. This means that the number indicates how deep the injector ports are on the pin.

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  • 25. 

    (411) What other problem besides centering can you eliminate by using a washer-nut assembly on a taper-lok pin?

    • Washer fumbling

    • Over torquing the nut

    • Corrosion of the mating surface

    • Mismatch of the pin and material composition

    Correct Answer
    A. Washer fumbling
    Explanation
    By using a washer-nut assembly on a taper-lok pin, you can eliminate the problem of washer fumbling. This means that the washer will not move or slip out of place during the assembly process or while in use. The washer will remain securely in position, ensuring proper alignment and preventing any potential issues that may arise from the washer becoming loose or dislodged.

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  • 26. 

    (412) When riveting parts together the first step you take is to

    • Ream holes to final size

    • Determine grip length required

    • Secure parts to prevent slippage

    • Determine rivet diameter requirements

    Correct Answer
    A. Secure parts to prevent slippage
    Explanation
    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 are held firmly in place, allowing for accurate and effective riveting.

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  • 27. 

    (412) When inspecting newly formed solid rivet shop heads what are the height and diameter requirements?

    • Height is ¼ of the rivet’s diameter; diameter is 1¼ of the rivet’s diameter

    • Height is ⅜ of the rivet’s diameter; diameter is 1⅜ of the rivet’s diameter

    • Height is ½ of the rivet’s diameter; diameter is 1½ of the rivet’s diameter

    • Height is ⅝ of the rivet’s diameter; diameter is 1⅝ of the rivet’s diameter

    Correct Answer
    A. Height is ½ of the rivet’s diameter; diameter is 1½ of the rivet’s diameter
    Explanation
    The height requirement for newly formed solid rivet shop heads is ½ of the rivet's diameter, while the diameter requirement is 1½ times the rivet's diameter.

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  • 28. 

    (413) For best results Jo-bolt holes should be drilled

    • Slightly undersized

    • Oversized to permit proper sleeve formation

    • Undersized, and then brought up to final size by reaming

    • To exact size, producing an interference fit in steel structures.

    Correct Answer
    A. Undersized, and then brought up to final size by reaming
    Explanation
    The best results for Jo-bolt holes can be achieved by initially drilling them slightly undersized and then bringing them up to the final size by reaming. This process allows for precise control over the size of the hole and ensures a proper fit for the sleeve in steel structures. By starting with a slightly smaller hole and then enlarging it with reaming, any potential errors or deviations can be corrected, resulting in a more accurate and secure fit.

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  • 29. 

    (413) The next step after installing a millable Jo-bolt is to

    • Inspect it for flushness

    • Inspect it for looseness

    • Shave it to meet flush requirements

    • Check for gaps between the manufacturer’s head and the surface

    Correct Answer
    A. Inspect it for looseness
    Explanation
    After installing a millable Jo-bolt, the next step is to inspect it for looseness. This is important because if the bolt is not securely tightened, it may cause structural issues or become a safety hazard. By inspecting it for looseness, any potential problems can be identified and addressed promptly, ensuring the bolt is properly secured.

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  • 30. 

    (413) Which of these tools is not required to remove a tight Jo-bolt fastener?

    • Punch.

    • Hammer.

    • Pilot drill

    • Drill bushing fixture

    Correct Answer
    A. Drill bushing fixture
    Explanation
    A drill bushing fixture is not required to remove a tight Jo-bolt fastener. A punch is used to drive out pins or dislodge stuck fasteners, a hammer is used to provide impact force, and a pilot drill is used to create a small hole as a guide for drilling. However, a drill bushing fixture is not necessary for removing a tight Jo-bolt fastener as it is used to hold the drill in place and provide accuracy when drilling holes.

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  • 31. 

    (413) What determines the twist drill size you need to remove a Jo-bolt that is rotating in the hole?

    • Diameter of the Jo-bolt

    • Head style of the Jo-bolt.

    • Grip length of the Jo-bolt.

    • Material composition of the Jo-bolt

    Correct Answer
    A. Diameter of the Jo-bolt
    Explanation
    The twist drill size needed to remove a Jo-bolt that is rotating in the hole is determined by the diameter of the Jo-bolt. The diameter of the Jo-bolt will determine the size of the hole that needs to be drilled in order to remove it.

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  • 32. 

    (414) To properly inspect an installed mechanical-lock blind bolt, you check the fit of the manufactured head against the surface,

    • Thread protrusion, and core-bolt flushness

    • Pin break-off position, and tightness of the core bolt

    • Position of the pin, and position of the locking collar.

    • Position of the alignment slots, and locking-collar position

    Correct Answer
    A. Position of the pin, and position of the locking collar.
    Explanation
    To properly inspect an installed mechanical-lock blind bolt, you need to check the position of the pin and the position of the locking collar. This is because the pin and the locking collar play crucial roles in the functionality and security of the blind bolt. The pin ensures that the bolt is securely fastened, while the locking collar prevents the bolt from loosening or rotating. By checking the positions of both the pin and the locking collar, you can ensure that the blind bolt is properly installed and functioning correctly.

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  • 33. 

    (414) Which is not a step in removing a mechanical-lock blind bolt?

    • Drill out the pin

    • Knock out the pin

    • Remove the sleeve

    • Drill out the sleeve

    Correct Answer
    A. Drill out the sleeve
    Explanation
    To remove a mechanical-lock blind bolt, the first step is to drill out the pin, which allows access to the sleeve. The second step is to knock out the pin, which separates the sleeve from the bolt. Finally, the sleeve needs to be removed by drilling it out. Therefore, drilling out the sleeve is not a step in removing a mechanical-lock blind bolt, as it is the final step in the process.

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  • 34. 

    (415) Which of these is not a procedure for drilling a mechanical-lock blind rivet hole?

    • Hold the drill 90 degrees to the surface of the part

    • Use the diameter drill bit specified in the TO

    • Do not use unnecessary pressure

    • Use a drill-bushing

    Correct Answer
    A. Use a drill-bushing
    Explanation
    A drill-bushing is not a procedure for drilling a mechanical-lock blind rivet hole. Drill-bushings are used to guide the drill bit and ensure accurate hole placement, but they are not specifically mentioned as a procedure for drilling a blind rivet hole. The other options, such as holding the drill 90 degrees to the surface, using the specified drill bit, and avoiding unnecessary pressure, are all valid procedures for drilling a blind rivet hole.

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  • 35. 

    (415) Gaps are permitted between a mechanical-lock blind rivet and the surface provided they meet which specifications?

    • Work-center standards

    • Local regulations

    • Technical orders

    • Vendor catalog

    Correct Answer
    A. Technical orders
    Explanation
    Technical orders provide specifications and guidelines for various processes and procedures, including the use of mechanical-lock blind rivets. These orders outline the requirements for gaps between the rivet and the surface, ensuring that they meet specific standards and regulations. Therefore, technical orders would be the appropriate source to determine the permissible gaps between a mechanical-lock blind rivet and the surface.

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  • 36. 

    (416) How many nose assemblies are required to install Composi-Lok II fasteners?

    • One

    • Two

    • Three

    • A nose assembly is required for every diameter

    Correct Answer
    A. Two
    Explanation
    To install Composi-Lok II fasteners, two nose assemblies are required. This means that for each diameter of the fastener, a separate nose assembly is needed. Therefore, to properly install the fasteners, two nose assemblies are necessary.

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  • 37. 

    (416) After installation what tool do you use to inspect a Composi-Lok fastener?

    • Grip gauge

    • Corebolt gauge

    • Drive nut gauge

    • Stem break off gauge

    Correct Answer
    A. Stem break off gauge
    Explanation
    After installation, a stem break off gauge is used to inspect a Composi-Lok fastener. This tool is specifically designed to measure the length of the stem that needs to be broken off after the fastener is installed. By using the stem break off gauge, one can ensure that the stem is broken off at the correct length, which is crucial for the proper functioning of the fastener.

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  • 38. 

    (417) If you find the nut plate is misaligned after installing it using pull-through blind rivets, the probable cause is the

    • Grip length of the rivet was too long

    • Grip length of the rivet was too short

    • Nut plate was clamped too tight during installation

    • Nut plate was clamped too loosely during installation

    Correct Answer
    A. Nut plate was clamped too loosely during installation
    Explanation
    When a nut plate is clamped too loosely during installation, it can cause misalignment. The nut plate needs to be securely fastened in order to properly align with the pull-through blind rivets. If it is not clamped tightly enough, it can move or shift, resulting in misalignment. Therefore, the probable cause for the misalignment in this scenario is that the nut plate was clamped too loosely during installation.

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  • 39. 

    (418) Which cable term defines a cylindrical steel rod?

    • Wire.

    • Twist.

    • Cable.

    • Strand.

    Correct Answer
    A. Wire.
    Explanation
    A cylindrical steel rod is commonly referred to as a wire. Wire is a term used to describe a thin, flexible, and cylindrical piece of metal, such as steel, that is often used for various purposes, including electrical conductors, fencing, and structural support.

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  • 40. 

    (418) A cable or wire rope twisted around a separate wire rope best describes which cable term?

    • Wire center

    • Strand center

    • Lay or twist center

    • Independent wire-rope center

    Correct Answer
    A. Independent wire-rope center
    Explanation
    The term "Independent wire-rope center" refers to a cable or wire rope that is twisted around a separate wire rope. This means that the wire rope is not part of a larger strand or center, but is instead an independent component within the cable.

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  • 41. 

    (418) Which of the following is not a type of aircraft cable?

    • Flexible.

    • Non-flexible.

    • Vinyl-coated.

    • Nylon-coated

    Correct Answer
    A. Vinyl-coated.
    Explanation
    Vinyl-coated is not a type of aircraft cable because aircraft cables are typically made of steel or stainless steel. The coating on aircraft cables is usually nylon, which provides additional protection against corrosion and abrasion. Vinyl coating is not commonly used for aircraft cables as it may not provide the same level of durability and protection as nylon coating.

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  • 42. 

    (418) What is the frequency of inspection when you substitute a corrosion resistant steel (CRES) cable for a carbon steel cable?

    • Double the time of normal inspection

    • Follow the normal inspection schedule

    • One-half the time of normal inspection

    • Three-quarters the time of normal inspection

    Correct Answer
    A. One-half the time of normal inspection
    Explanation
    When substituting a corrosion resistant steel (CRES) cable for a carbon steel cable, the frequency of inspection is reduced to one-half the time of normal inspection. This is because CRES cables are more resistant to corrosion, which means they are less likely to deteriorate or require maintenance compared to carbon steel cables. Therefore, inspections can be done less frequently while still ensuring the cable's integrity and safety.

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  • 43. 

    (418) What cable accessory is mainly used to change cable direction?

    • Cable drum assembly

    • Turnbuckle assembly

    • Quadrant assembly

    • Bell-crank unit

    Correct Answer
    A. Bell-crank unit
    Explanation
    A bell-crank unit is mainly used to change the direction of a cable. It consists of two arms connected at a pivot point, with the cable attached to one arm and the force applied to the other arm. When the force is applied to the second arm, it causes the cable to change direction. This makes the bell-crank unit an essential accessory for changing the direction of a cable in various applications.

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  • 44. 

    (419) A cable that has had a kinked area straightened

    • Can be left in service

    • Must be repaired or replaced

    • Should be coated with lubricant

    • Must be tested for broken wires within the kinked area.

    Correct Answer
    A. Must be repaired or replaced
    Explanation
    When a cable has a kinked area that has been straightened, it is important to repair or replace it. Straightening a kinked area can cause damage to the cable, such as broken wires or weakened insulation. This damage can lead to potential failures or malfunctions in the cable, which can be hazardous. Therefore, it is necessary to address the issue by repairing or replacing the cable to ensure its proper functioning and safety.

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  • 45. 

    (419) You cannot cut cables by using a

    • Torch.

    • Cold chisel

    • Cable swager

    • Cutting machine

    Correct Answer
    A. Torch.
    Explanation
    A torch is not a suitable tool for cutting cables because it uses an open flame, which can cause damage to the cable insulation and potentially lead to a fire hazard. A cold chisel is a tool used for cutting and shaping metal, not cables. A cable swager is used for crimping and securing cable ends, not cutting them. A cutting machine, specifically designed for cutting cables, would be the most appropriate tool for this task.

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  • 46. 

    (419) What is the maximum amount a terminal may be bent after swaging?

    • ¼º.

    • ½º.

    • ¾º.

    • 1º

    Correct Answer
    A. ½º.
    Explanation
    Swaging is a process used to connect two pieces of metal together by compressing and reshaping the terminal. The maximum amount a terminal may be bent after swaging refers to the acceptable degree of bending or angling that the terminal can withstand without compromising its structural integrity. In this case, the correct answer is ½º, which means that the terminal can be bent up to half of a degree after the swaging process. This limit ensures that the terminal remains secure and functional while allowing for some flexibility in its positioning.

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  • 47. 

    (419) In order to properly pull-test a cable, you keep the cable under tension for

    • One minute.

    • Two minutes

    • Three minutes

    • Four minutes.

    Correct Answer
    A. Three minutes
    Explanation
    To properly pull-test a cable, it is necessary to keep the cable under tension for three minutes. This duration allows for a thorough evaluation of the cable's strength and durability. A shorter time may not provide enough stress on the cable to accurately assess its performance, while a longer time may lead to unnecessary strain or potential damage. Therefore, three minutes is considered an appropriate timeframe for conducting a pull-test on a cable.

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  • 48. 

    (420) Which type of aluminum alloy tubing do you use to repair a hydraulic system that carries high pressures up to 3,000 psi?

    • 1100–0.

    • 2024-T.

    • 5052–0.

    • 6061-T.

    Correct Answer
    A. 6061-T.
    Explanation
    6061-T is the correct answer for repairing a hydraulic system that carries high pressures up to 3,000 psi. This type of aluminum alloy tubing is known for its high strength and excellent corrosion resistance, making it suitable for applications involving high pressure. The "T" in 6061-T indicates that the tubing has undergone heat treatment to further enhance its mechanical properties.

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  • 49. 

    (420) The preferred tubing material for manufacturing external aircraft brake lines is

    • Corrosion-resistant stainless steel tubing type 304

    • 2024-T aluminum alloy tubing

    • 5052–0 aluminum alloy tubing.

    • 6061-T aluminum alloy tubing

    Correct Answer
    A. Corrosion-resistant stainless steel tubing type 304
    Explanation
    Corrosion-resistant stainless steel tubing type 304 is the preferred tubing material for manufacturing external aircraft brake lines because it provides excellent resistance to corrosion, which is crucial for ensuring the safety and reliability of the brake system. Stainless steel type 304 is also known for its high strength and durability, making it suitable for withstanding the high pressure and temperature conditions experienced in aircraft brake systems. Additionally, stainless steel type 304 has good formability and can be easily bent and shaped to meet the specific requirements of the brake lines.

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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 13, 2017
    Quiz Created by
    Jbesrod

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