1.1 This test method covers the apparatus and procedures for measuring properties of bulk solids, henceforth referred to as Carr Indices.1.2 This test method is suitable for free flowing and moderately cohesive powders and granular materials up to 2.0 mm in size. Materials must be able to pour through a 7.0 ± 1.0-mm diameter funnel outlet when in an aerated state.1.3 This method consists of eight measurements and two calculations to provide ten tests for Carr Indices. Each