If you use the Shell command on a solid body without selecting at least one face to pierce, what will the result be?

When the Shell command is applied to a solid body in Siemens NX, at least one face must be selected to define how the shell should be created. If no face is selected to pierce, the Shell command cannot accurately determine which part of the solid body to hollow out and to what depth. As a result, the Shell operation does not know how to modify the geometry of the solid.

Given this context, if the Shell command is executed without selecting a face to pierce, the operation attempts to create a hollow solid body, but it will not complete the intended function effectively. The result may be an incomplete operation that does not change the solid into a fully hollow structure as expected. This situation often leads to ambiguity about the output, which could manifest in various ways depending on the specifics of the model being altered.

Thus, while the intention may have been to create a hollow solid, the outcome generally reflects an unmodified state or creates an incomplete feature rather than achieving a properly defined hollow solid body. As a result, the correct answer reflects the intended assumption that the operation was defined to create a hollow solid structure but fails to do so without the necessary input details.