Which hardness test utilizes a ball indenter to assess material hardness?

The Brinell Test is the correct answer as it specifically utilizes a ball indenter to measure the hardness of materials. This method involves pressing a hardened steel or carbide ball into the material’s surface under a controlled load. The diameter of the indentation left in the material after the load is removed is measured, and this measurement is used to determine the material's hardness value.

This technique is widely applied for materials with a coarse or heterogeneous structure, such as castings and forgings. The size of the ball and the load applied are key factors that influence the results, making it suitable for testing metals and alloys.

Other tests like the Rockwell Test and the Vickers Test use different types of indenters, such as conical diamonds or diamond pyramids, for measuring hardness. The Mohs Test, on the other hand, is a qualitative measure of hardness based on the ability of one material to scratch another and does not involve an indenter to measure hardness in the same way.