FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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What is a main difference between Lockbolt / Huckbolt tension and shear fasteners?

Material composition
Size of the fastener
Number of locking collar grooves
Type of installation tool required

The correct answer is: Number of locking collar grooves

A main difference between Lockbolt / Huckbolt tension and shear fasteners is the number of locking collar grooves. Lockbolt / Huckbolt fasteners have multiple grooves on the collar that allow for extra tension as compared to shear fasteners that have just one. This makes Lockbolt / Huckbolt fasteners stronger and more stable under tension. Material composition is incorrect because both Lockbolt / Huckbolt and shear fasteners can be made from various materials. Size of the fastener is incorrect because both types can come in different sizes depending on the application. Type of installation tool required is incorrect because both types can require specific tools for installation.