Red Seal Auto Body and Collision Technician Practice Exam

What is the purpose of a block sander?

1. To paint large areas quickly

2. To create an even surface on body filler before painting

3. To remove rust from metal surfaces

4. To apply adhesive evenly

The correct answer is: To create an even surface on body filler before painting

The block sander serves a crucial role in achieving a smooth and level surface on body filler before the painting process begins. This tool is designed to hold sandpaper and allows the user to apply consistent pressure across the surface of the filler, effectively removing imperfections, high spots, and ensuring that the substrate is flat. By using a block sander, technicians can create a more uniform surface which helps in achieving a high-quality finish when paint is applied. This practice reduces the likelihood of paint imperfections such as ripples or unevenness, ultimately leading to a professional and aesthetically pleasing result. The other options highlight different tools and processes not suited for the specific task of preparing body filler surfaces. While painting large areas and applying adhesives are important aspects of auto body work, they do not directly relate to the function of a block sander in surface preparation. Rust removal pertains to metal surface care and is typically achieved with a different set of tools and techniques.