RCDD Question #103: Real Exam Question with Answer & Explanation

The correct answer is B. Cable transit. A cable transit system is classified as a mechanical firestop because it uses physical, modular compressed components to seal around cables rather than relying on applied chemical or cementitious materials.

Question

A(n) ________ system is considered a mechanical firestop.

Options

ACementitious
BCable transit
CFirestop block
DIntumescent sheet

Explanation

A cable transit system is classified as a mechanical firestop because it uses physical, modular compressed components to seal around cables rather than relying on applied chemical or cementitious materials.

Common mistakes.

A. Cementitious systems are material-based firestops that use a poured or troweled mortar compound to fill and harden in penetrations, not a mechanical assembly.
C. Firestop blocks are passive material inserts placed into openings and are classified as material-based products, not mechanical firestop systems.
D. Intumescent sheets are reactive, material-based products that expand when heated and rely on a chemical response rather than a mechanical assembly.

Concept tested. Mechanical firestop classification of cable transit systems

Reference. https://www.fcia.org/firestop-knowledge-center

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