The swift cup test evaluates the following property of a sheet metal.

ANS:B - Drawability

The Swift Cup Test evaluates the drawability of a sheet metal. Explanation:

1. Drawability: The drawability of a sheet metal refers to its ability to undergo deep drawing processes without failure. Deep drawing involves the deformation of a sheet metal blank into a hollow shape, such as a cup or shell, by means of a punch and die. The Swift Cup Test specifically assesses the drawability of a sheet metal by measuring the maximum depth (or cup height) that can be achieved without cracking or tearing.
2. Stretchability: Stretchability refers to the ability of a sheet metal to stretch or elongate without tearing when subjected to tensile forces. While stretchability is related to drawability, it focuses more on the material's behavior under tensile stress rather than during the deep drawing process.
3. Bendability: Bendability refers to the ability of a sheet metal to undergo bending or forming processes without cracking or failure. While bendability is an important property for sheet metals, it is not specifically evaluated by the Swift Cup Test, which is designed to assess drawability.
4. None of these: The Swift Cup Test is specifically designed to evaluate drawability, so this option is not correct.