CPI Fasteners, Anchors & Hardware

Question 1

Which type of anchor is best suited for securing heavy equipment to hollow concrete block (CMU) walls?

Accepted Answer

Toggle bolt

Answer

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.

Question 2

What does the term 'shear load' refer to when selecting a fastener?

Accepted Answer

The force acting perpendicular to the fastener axis

Answer

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.

Question 3

A Class 8.8 metric bolt indicates which property?

Accepted Answer

Minimum tensile strength of 800 MPa and yield strength of 640 MPa

Answer

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.

Question 4

When installing a wedge anchor into concrete, what is the minimum edge distance typically required?

Accepted Answer

5 times the anchor diameter

Answer

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.

Question 5

What is the primary advantage of using stainless steel fasteners over zinc-plated steel fasteners in exterior installations?

Accepted Answer

Stainless steel offers superior corrosion resistance in wet or coastal environments

Answer

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.

(CPI) Certified Professional Installer Practice Test

(CPI) Certified Professional Installer Practice Test

CPI Fasteners, Anchors & Hardware