The direction of the first machine floating pass should be ____________ to the direction of the last finishing procedure.

• A. Perpendicular
• B. Parallel
• C. Diagonal
• D. Irregular

Answer: (A)

The key idea is that finishing texture and flatness improve when you cross the paths of your passes. The first machine floating pass should be perpendicular to the direction of the last finishing pass because finishing in a different direction helps blend and cross over any ridges or high spots created by the first pass. That cross-direction pattern creates a more uniform surface, reduces visible track marks from the final pass, and aids in pulling the cream and smoothing the surface evenly.

If the passes were parallel, the last finishing stroke could ride along the grooves left by the first pass, making the surface look grooved and less uniform. A diagonal or irregular direction wouldn’t provide the predictable cross-hatch effect that helps achieve consistent texture and planarity.