CPI Fasteners, Anchors & Hardware 3

Question 1

What is the standard practice for minimum embedment depth when installing a wedge anchor into concrete?

Accepted Answer

At least the length specified by the manufacturer, typically 2.5 to 4 times the anchor diameter

Answer

At least 1 inch regardless of anchor size

Answer

Minimum of 1 anchor diameter

Answer

Half the total anchor length

Question 2

A Grade 5 SAE bolt has head markings of how many radial lines?

Accepted Answer

3 radial lines

Answer

No lines

Answer

6 radial lines

Answer

An X pattern

Question 3

Which anchor is most appropriate for suspending mechanical systems from a poured concrete ceiling?

Accepted Answer

Drop-in anchor

Answer

Plastic expansion anchor

Answer

Hollow wall anchor

Answer

Lead shield anchor

Question 4

What effect does overtightening a threaded fastener beyond its proof load have?

Accepted Answer

It causes permanent elongation (yielding) that reduces clamping force and can lead to bolt failure

Answer

It increases the clamping force and joint strength

Answer

It creates a tighter thread engagement, improving vibration resistance

Answer

It has no effect if the fastener is high-grade steel

Question 5

In drywall construction, which fastener type is specifically designed to hold in the gypsum core rather than relying on the paper facing?

Accepted Answer

EZ Ancor or self-drilling drywall anchor

Answer

Standard coarse-thread drywall screw

Answer

Toggle bolt

Answer

Coarse-thread lag screw

Question 6

When using a torque wrench to tighten a fastener, what is the correct procedure?

Accepted Answer

Tighten in one continuous motion until the wrench clicks or deflects at the set torque value

Answer

Set the torque above the target, tighten, then back off to the target value

Answer

Apply torque in rapid back-and-forth strokes to seat the fastener evenly

Answer

Hand-tighten first, then apply twice the rated torque for safety margin

Question 7

What is the purpose of anti-seize compound applied to fastener threads in high-temperature applications?

Accepted Answer

To prevent galling and seizing of threads that would make future removal difficult

Answer

To increase the torque required to install the fastener

Answer

To lubricate threads so they can be overtightened safely

Answer

To seal against fluid or gas leakage through the thread