Final answer:
Flexural testing is commonly used to determine the strength properties of hard brittle materials such as ceramics.
Step-by-step explanation:
The test commonly used to determine the strength properties of hard brittle materials such as ceramics is flexural testing. Flexural testing, also known as bending testing, involves applying a bending load to a sample of the material and measuring the deformation and failure behavior. This test is more suitable for ceramics because it puts less stress on the material compared to tensile testing, which can cause brittle materials to fail more easily.