Final answer:
The statement is true that a normal strain in an axial member is referred to as an axial strain, which occurs when deformation is parallel to the axis of the member.
Step-by-step explanation:
A normal strain in an axial member is, indeed, often referred to as an axial strain. Therefore, the statement is true. An axial strain occurs when the deformation is parallel to the axis of the member under tensile or compressive stress. In contrast, shear strain occurs when deformation is perpendicular to the initial length, and it's caused by a shear stress.