Fastener Selection & Application Flashcards
7 cards from real CFS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Fastener Selection & Application flashcards as text
A T-bolt is most commonly used in conjunction with which type of structural component?
Answer: Aluminum extrusion T-slots
T-bolts are designed to slide into the T-slot channels of aluminum extrusions for flexible, repositionable fastening in modular systems.
Which fastener is most appropriate for attaching a heavy overhead load to a concrete ceiling?
Answer: Concrete wedge anchor
Concrete wedge anchors are specifically engineered for high-load applications in solid concrete, providing reliable tensile and shear resistance.
What does the 'proof load' of a bolt represent?
Answer: The maximum tensile load the bolt can withstand without permanent deformation
Proof load is the maximum axial tensile load a fastener must withstand without acquiring a permanent set, typically 85-93% of yield strength.
In food processing equipment, which fastener material is most commonly specified to meet FDA and USDA requirements?
Answer: 316 Stainless steel
316 stainless steel is preferred in food processing due to its superior corrosion resistance (especially to chlorides used in cleaners) and non-reactive surface.
A hex flange bolt differs from a standard hex bolt primarily because it:
Answer: Incorporates an integral washer-like flange under the head
A hex flange bolt has a built-in flange below the head that distributes clamping load over a larger area, eliminating the need for a separate washer.
When is a castle nut (castellated nut) the preferred choice over a standard hex nut?
Answer: When a cotter pin or safety wire must be used to prevent rotation
Castle nuts have slots that align with a hole in the bolt shank, allowing a cotter pin to be inserted to positively lock the nut against rotation.
Which condition most accurately describes 'galling' as it applies to fasteners?
Answer: Adhesive wear and seizure between mating threaded surfaces
Galling is a form of adhesive wear where mating metal surfaces (especially stainless steel) seize together during tightening due to friction and metal transfer.