Which of the following is not a type of projection on an engineering drawing?

The correct option is identified as "C" because "Cascade" is not a recognized type of projection used in engineering drawings. In engineering design and drafting, projection methods are critical as they provide a way to represent three-dimensional objects on two-dimensional surfaces.

Orthographic projection is one of the most widely used types of projection; it involves creating multiple views of an object (typically the front, top, and side) in a way that the true dimensions are preserved. This method allows engineers and designers to convey detailed information about the shape and size of the object.

Auxiliary projection is another important method, used when a face of an object is not parallel to any of the principal planes of projection. This technique helps to show features that might be difficult to visualize from the standard views.

Oblique projection is characterized by projecting the features of the object at an angle to the viewing plane, thus allowing for a representation that reveals more depth than orthographic view, although at the expense of accuracy.

In contrast, "Cascade" does not pertain to established projection techniques in engineering graphics or drafting. By understanding these categories, it becomes clear why "Cascade" is not included in the standard set of projection methods.