Quality Control & Inspection Flashcards
7 cards from real IFC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Quality Control & Inspection flashcards as text
A firestop installer applies a product labeled for a 2-hour F-rating to a wall assembly rated for 3 hours. What should the inspector do?
Answer: Reject it — the system must meet or equal the fire-resistance rating of the barrier
Firestop systems must achieve an F-rating equal to the fire-resistance rating of the penetrated barrier; a lower-rated system is non-compliant.
When inspecting a firestop system on a flexible plastic pipe (FPP) penetration, which component requires special attention that may not apply to metallic pipe?
Answer: Intumescent collar or wrap strip that expands to close the annular space upon pipe melting
FPP melts in a fire, requiring an intumescent device that expands to fill the void; without it, an open hole is left in the barrier, and the inspector must confirm this device is correctly installed.
An inspector is reviewing firestop submittals prior to installation. Which item would prompt an immediate rejection of the submittal package?
Answer: A system drawing showing an annular space of 4 inches where the maximum tested is 2 inches
An annular space exceeding the tested maximum invalidates the listing; the system cannot perform as rated and must be redesigned before submittal approval.
Under ASTM E2393, which of the following is NOT a required element of a through-penetration firestop inspection?
Answer: Verification that the installer holds a professional engineering license
ASTM E2393 inspection elements include system identification, material verification, and fill quality; it does not require the installer to hold a PE license.
A QC inspector notices that an installer used a firestop sealant approved for the listed system but applied it at half the specified minimum depth. What is the correct determination?
Answer: Fail — installation depth is a critical dimension required by the listing
Product depth/thickness is a mandatory dimension in the listed system; insufficient depth means the assembly was not installed per the listing and must be rejected.
Which of the following best describes a 'through-penetration firestop system' (TPFS) classification in the UL directory?
Answer: A tested assembly classified by F-rating, T-rating, and sometimes L-rating for specific penetration types and barrier configurations
UL TPFS classifications define the F-rating (flame), T-rating (temperature transmission), optional L-rating (air leakage), penetrant type, annular space, and barrier type — all must match field conditions.
When is a 'statement of special inspection' (SSI) typically required in the firestop QC process?
Answer: Before a building permit is issued, as part of the permit application package
The SSI is submitted with the permit application to identify the inspection agency and scope; it must be on file before permits are issued and work begins.