Fasteners, Anchors & Hardware Flashcards
7 cards from real CPI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Fasteners, Anchors & Hardware flashcards as text
Which type of anchor is best suited for securing heavy equipment to hollow concrete block (CMU) walls?
Answer: Toggle bolt
Toggle bolts distribute load across a wide area behind the hollow wall, making them suitable for CMU or hollow block applications where solid embedment is not possible.
What does the term 'shear load' refer to when selecting a fastener?
Answer: The force acting perpendicular to the fastener axis
Shear load is a force acting perpendicular (sideways) to the fastener's axis, as opposed to tensile (pull-out) load which acts along the axis.
A Class 8.8 metric bolt indicates which property?
Answer: Minimum tensile strength of 800 MPa and yield strength of 640 MPa
The Class 8.8 designation means the bolt has a minimum tensile strength of 800 MPa and a yield-to-tensile ratio of 0.8, giving a yield strength of 640 MPa.
When installing a wedge anchor into concrete, what is the minimum edge distance typically required?
Answer: 5 times the anchor diameter
Most wedge anchor manufacturers specify a minimum edge distance of at least 5 anchor diameters to prevent concrete edge blowout and maintain rated load capacity.
What is the primary advantage of using stainless steel fasteners over zinc-plated steel fasteners in exterior installations?
Answer: Stainless steel offers superior corrosion resistance in wet or coastal environments
Stainless steel fasteners resist oxidation and corrosion far better than zinc-plated steel, making them the preferred choice for exterior, marine, or high-humidity environments.
Which fastener drive type provides the best resistance to cam-out during high-torque installation?
Answer: Torx (star-drive)
Torx (star-drive) fasteners have a six-point star pattern that virtually eliminates cam-out, allowing high torque to be applied without the driver slipping out of the head.
For a lag screw installation, the pilot hole in the member being fastened should be drilled to what size?
Answer: The full shank diameter of the lag screw
The pilot hole through the first (clamped) member should match the full shank diameter of the lag screw so the threads grip only in the receiving member.