What this exam covers Practice questions for the California CSLB Drywall (C-9) license exam, delivered online and graded instantly. Per the state's classification, a C-9 contractor installs, tapes, textures, and finishes drywall, gypsum board, and other similar rigid wallboard. Works on any device, including iPad. See the official CSLB C9 classification. Updated July 2026 · 2022 CA Codes · 549 Questions · Topic Practice Content Last Updated: July 24, 2026 Code Basis: 2022 California Codes Question Count: 549 practice questions Organized By: CSLB study-guide topic categories Includes: This practice exam has been updated using Peerless’s vetted usable question set. Questions are organized by CSLB study-guide topic categories and include answer explanations to support full-exam review and focused topic practice. Each topic has a mini-exam to help you develop mastery. Sample questions — Try our free practice test A bugle head screw attaches multi-layer gypsum board to steel framing up to what gauge?A. 12 · ✓ B. 14 · C. 16 · D. 24 Fasteners for applying metal trim should be spaced a maximum of how many inches o.c.?A. 14" · B. 12" · C. 10" · ✓ D. 9" Finishing compound should be applied with tools of sufficient width to extend at least how many inch(es) beyond both sides of the center of the joint tape?✓ A. 6 · B. 5 · C. 4 · D. 3 For better sound absorption, fibrous sound board is not as effective as:A. urethane foam · B. asphalt felt · C. channel metal · ✓ D. sound resilient channels For fastening of gypsum board to wood frames, the standard specifications for steel screws will specify Type:A. F · B. G · C. S · ✓ D. W
