A drywall contractor lays out and installs gypsum wall board and gypsum wall board assemblies including nonstructural metal framing members, and performs the taping and texturing operations including the application of compounds that adhere to wall board to produce a continuous smooth or textured surface.
Authority cited: Sections 7008 and 7059, Reference: Sections 7058 and 7059 (Business and Professions Code)
Content of the Examination
The Drywall (C-9) Examination is divided into five major sections. These sections are:
1. Job Planning (15%)
Plans and specifications evaluation
Mathematical estimating calculations
Material types and quantities
Tools and equipment requirements
2. Site Inspection and Preparation (13%)
Job readiness evaluation
3. Framing Assembly and Drywall Installation (28%)
Codes, plans and specifications
Control points, measuring and layouts
Installations (fastening, welding, furring and fastening)
Metal framing and door frames
Suspended drywall ceiling channels
Sound, fire rated and multi-layer applications
Drywall cutting and layouts
4. Taping and Finishing (31%)
Joint compounds and taping
Finishing applications and procedures
Texturing applications and procedures
Repairing surface techniques
5. Safety (13%)
Accident/fall prevention procedures
Tool and equipment operations
Scaffolding and ladders
Personal gear and clothing
*Percentages are approximate*
The following questions are typical of the types of items that are on the examination. The correct answer is highlighted.
1. What is the primary advantage of using a laminated wall system?
Resistance to cracking
Reduced sound transmission
Fewer fasteners to finish
Increased fire protection
2. How many square feet of drywall are needed to cover both sides of a wall that is 26 feet long and 14 feet height?
364 sq. ft.
416 sq. ft.
546 sq. ft.
728 sq. ft.
3. Which of the following systems is used for a typical residential 1-hour firewall?
Two layers of 1/4” drywall
One layer of 1/2” drywall
One layer of 5/8” drywall
Two layers of 5/8” drywall
*All questions are written and reviewed by licensed contractors who are actively working in the field*
Cal/OSHA State of California Construction Safety Orders.