IFC Materials & Equipment Knowledge 3

Question 1

What does the 'F-Rating' in a firestop system listing indicate?

Accepted Answer

The time the system prevents flame passage

Answer

The F-Rating indicates the duration in hours that the firestop assembly prevents the passage of flame through the penetration.

Question 2

An intumescent firestop collar is used primarily to protect penetrations of what type of material?

Accepted Answer

Combustible plastic pipe

Answer

Intumescent collars are designed for combustible plastic pipes; they expand inward to close the opening after the pipe melts or burns.

Question 3

What is the significance of the 'T-Rating' in a firestop system?

Accepted Answer

Time before the unexposed surface temperature rises 325°F above ambient

Answer

The T-Rating limits the temperature rise on the unexposed side to no more than 325°F (181°C) above ambient during the test period.

Question 4

Which substrate material requires the use of a primer before applying most firestop sealants to ensure proper adhesion?

Accepted Answer

Polyvinyl chloride (PVC) pipe

Answer

PVC and other plastics are typically low-energy surfaces that require priming to achieve adequate sealant adhesion as specified by the manufacturer.

Question 5

What is the minimum cure time a firestop sealant must achieve before the assembly can be considered fully functional in most manufacturers' instructions?

Accepted Answer

It varies per product and must be confirmed in the system design (UL or FM listing)

Answer

Cure time requirements vary by product formulation and must be confirmed in the specific tested and listed system design documentation.

(IFC) International Firestop Council Premier Certificate Practice Test

(IFC) International Firestop Council Premier Certificate Practice Test

IFC Materials & Equipment Knowledge 3