Surface Preparation & Safety Procedures Flashcards
7 cards from real CFI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Surface Preparation & Safety Procedures flashcards as text
When patching a low spot in a concrete subfloor with a cementitious patch, what is the minimum cure time typically required before installing resilient flooring?
Answer: Follow manufacturer's instructions (typically 1–4 hours)
Cure times vary by product; always follow the specific manufacturer's data sheet, which typically ranges from 1–4 hours.
Which condition in a wood subfloor requires correction before installing hardwood flooring?
Answer: Subfloor deflection exceeding L/360 of the span
Deflection greater than L/360 causes the floor to flex, leading to squeaking, cracking, and adhesive failure.
When handling and cutting fiber-cement backer board, which safety measure is most important?
Answer: Use a respirator due to silica content in dust
Fiber-cement board contains silica, and cutting generates hazardous dust requiring respiratory protection.
A subfloor panel has an OSB stamp reading '24/16 — 7/16'. What does '24/16' indicate?
Answer: Maximum roof span / maximum floor span in inches
The span rating '24/16' means the panel can span 24 inches on roofs and 16 inches on floors between supports.
What is the purpose of acclimating hardwood flooring before installation?
Answer: To equalize moisture content between the wood and job site conditions
Acclimation equalizes the wood's moisture content with the environment, minimizing post-installation expansion or contraction.
On a construction site, where should flooring adhesive containers be stored to comply with fire safety requirements?
Answer: In a flammable materials storage cabinet away from ignition sources
Solvent-based adhesives are flammable and must be stored in approved flammable storage cabinets away from heat and ignition.
Which of the following is a sign of hydrostatic pressure affecting a below-grade concrete slab?
Answer: White crystalline deposits (efflorescence) on the surface
Efflorescence is caused by water moving through concrete and depositing salts, indicating active moisture migration from below.