Final answer:
A level should be used to check the wall and floor surfaces for evenness before cabinet installation.
Step-by-step explanation:
The tool that should be used to check the wall and floor surfaces for evenness before cabinet installation is a level. A level is a tool with a straight edge and a bubble vial filled with liquid, which is used to determine if a surface is level or plumb. By placing the level on the wall or floor surfaces, you can ensure that they are even before installing the cabinets.