This document discusses common cake faults, their causes, and ways to classify them. It identifies two main types of cake faults - external and internal. External faults include a crust that is too dark, cakes that are too small, spots on cakes, shrinkage, bursting or peaking on top, a crust that is too thick or pale. Internal faults cover uneven texture, holes and tunnels, coarse grain, poor flavor, sinking fruit, crumbling or pale fruitcakes, cakes being dense or having poor keeping quality. Each fault is explained along with potential causes such as incorrect ingredient amounts, quality issues, mixing errors, or baking problems.