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
What is the standard practice for minimum embedment depth when installing a wedge anchor into concrete?
Answer: At least the length specified by the manufacturer, typically 2.5 to 4 times the anchor diameter
Manufacturers specify minimum embedment depths (typically 2.5–4× the anchor diameter) to ensure the expansion mechanism develops full bearing against undisturbed concrete.
A Grade 5 SAE bolt has head markings of how many radial lines?
Answer: 3 radial lines
SAE Grade 5 bolts are identified by 3 radial lines on the bolt head, indicating medium-strength carbon steel with a tensile strength of approximately 120,000 psi.
Which anchor is most appropriate for suspending mechanical systems from a poured concrete ceiling?
Answer: Drop-in anchor
Drop-in anchors are installed flush into a drilled concrete hole and internally expand when a setting tool is driven in, making them ideal for overhead concrete suspension applications.
What effect does overtightening a threaded fastener beyond its proof load have?
Answer: It causes permanent elongation (yielding) that reduces clamping force and can lead to bolt failure
Overtightening past the proof load yields the bolt, permanently stretching it; the reduced cross-section weakens the fastener and the reduced spring-back lowers actual clamping force.
In drywall construction, which fastener type is specifically designed to hold in the gypsum core rather than relying on the paper facing?
Answer: EZ Ancor or self-drilling drywall anchor
Self-drilling drywall anchors (e.g., EZ Ancor) thread into and expand within the gypsum core, distributing load beyond just the paper facing and providing higher pull-out resistance.
When using a torque wrench to tighten a fastener, what is the correct procedure?
Answer: Tighten in one continuous motion until the wrench clicks or deflects at the set torque value
The correct technique is to tighten in one smooth, continuous motion until the torque wrench signals (clicks, deflects, or beeps) at the pre-set value, then stop immediately.
What is the purpose of anti-seize compound applied to fastener threads in high-temperature applications?
Answer: To prevent galling and seizing of threads that would make future removal difficult
Anti-seize compounds coat threads with a lubricating metallic or ceramic film that prevents corrosion and thread galling at elevated temperatures, ensuring the fastener can be removed later.