CPI Fasteners, Anchors & Hardware 2

Question 1

What is the purpose of a lock washer used with a bolt and nut assembly?

Accepted Answer

To prevent the nut from loosening due to vibration

Answer

To increase the tensile load capacity of the bolt

Answer

To distribute the clamping load over a larger surface area

Answer

To act as a seal against moisture ingress

Question 2

A chemical (adhesive) anchor offers which primary advantage over a mechanical expansion anchor in cracked concrete?

Accepted Answer

Chemical anchors bond to the concrete and perform reliably in cracked concrete conditions

Answer

Chemical anchors are easier and faster to install

Answer

Chemical anchors are less expensive than mechanical anchors

Answer

Chemical anchors can be removed and reused after curing

Question 3

When selecting fasteners to connect aluminum components, which material should be avoided to prevent galvanic corrosion?

Accepted Answer

Zinc-coated steel

Answer

Stainless steel 316

Answer

Aluminum rivets

Answer

Nylon

Question 4

What does the 'pullout strength' of an anchor refer to?

Accepted Answer

The maximum tensile force the anchor can resist before being pulled out of the base material

Answer

The force required to rotate the anchor during installation

Answer

The shear force capacity of the anchor in side-loaded applications

Answer

The torque specification listed on the anchor packaging

Question 5

Which type of rivet is used when only one side of the workpiece is accessible during installation?

Accepted Answer

Blind (pop) rivet

Answer

Solid rivet

Answer

Drive rivet

Answer

Split rivet

Question 6

The proof load of a bolt is defined as:

Accepted Answer

The load a bolt can sustain without permanent deformation, used as the installation target

Answer

The maximum load the bolt can carry without breaking

Answer

The load at which the bolt permanently deforms (yields)

Answer

The fatigue load rating after one million cycles

Question 7

When installing masonry screws (e.g., Tapcon) into concrete, what type of drill bit must be used?

Accepted Answer

Carbide-tipped masonry bit

Answer

High-speed steel (HSS) twist bit

Answer

Titanium-coated wood bit

Answer

Cobalt step drill bit