CFS Blind Fasteners & Rivets

Question 1

What defining characteristic distinguishes a blind fastener from a standard through-bolt?

Accepted Answer

It requires access to only one side of the joint for installation

Answer

A blind fastener is specifically designed to be installed and set from one side of the assembly, making it ideal when the back side is inaccessible.

Question 2

In a break-mandrel (pull-type) blind rivet, what happens to the mandrel during installation?

Accepted Answer

It is pulled until it fractures at a predetermined break notch

Answer

During installation, the mandrel is pulled by the rivet tool until it fractures at a designed break notch, leaving the head embedded to plug the rivet body.

Question 3

What does the 'grip range' of a blind rivet refer to?

Accepted Answer

The total material thickness range the rivet can clamp effectively

Answer

Grip range specifies the minimum and maximum total material thickness (stack) that a given blind rivet is designed to clamp and set correctly.

Question 4

Which blind rivet body material is most commonly paired with stainless steel mandrels for marine and outdoor applications?

Accepted Answer

Aluminum body with stainless steel mandrel

Answer

Aluminum bodies are lightweight and corrosion-resistant, and pairing them with stainless steel mandrels provides superior corrosion performance in marine or outdoor environments.

Question 5

An 'open-end' blind rivet differs from a 'closed-end' blind rivet in that the open-end type:

Accepted Answer

Allows liquid and gas to pass through the rivet after setting

Answer

Open-end rivets leave a hollow core after the mandrel breaks, allowing moisture or gases to penetrate; closed-end rivets seal the tail end to prevent this passage.

(CFS) Certified Fastener Specialist Practice Test

(CFS) Certified Fastener Specialist Practice Test

CFS Blind Fasteners & Rivets