Identify the incorrect statement from the following options:

Explanation

Option A is incorrect because riveting actually provides a permanent method of fastening. Option B correctly describes the double riveted butt joint formed by overlapping plates fastened with two rivet rows. Option C is accurate since the rivet shank diameter should be less than the drilled hole size to ensure proper fitting. Option D correctly defines the efficiency of a riveted joint as the strength ratio compared to a solid plate.