National Occupational Competency Testing Institute (NOCTI) Carpentry Practice Exam

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What is the common name for the white trim that runs along the bottom of a wall?

Baseboard
Crown Moulding
Mullion
Chair Rail

The correct answer is: Baseboard

The common name for the white trim that runs along the bottom of a wall is indeed the baseboard. Baseboards serve several important functions in carpentry and interior design. They protect the lower part of the wall from scuff marks and damage due to furniture or foot traffic. Additionally, they provide a finished look to the room by bridging the gap between the wall and the floor. Baseboards come in various styles and heights, enhancing the overall aesthetic of the space. Crown moulding, while also a type of trim, is typically found at the junction of the wall and the ceiling, serving a different decorative purpose. A mullion refers to the vertical or horizontal bar between panes of glass in a window, and a chair rail is positioned higher on the wall, usually around 32 to 36 inches above the floor, to protect the wall from chair backs and to add visual interest. Each of these trim types has its own distinct function and placement in a room, which differentiates them from baseboards.