CDT Sectional Views & Auxiliary Views 3

Question 1

What is an aligned section?

Accepted Answer

A section where off-axis features are rotated into the cutting plane so they appear true shape in the section view

Answer

In an aligned section, features such as holes or spokes that do not lie in the cutting plane are rotated about the object's center axis into the cutting plane so their true relationship is shown without distortion.

Question 2

When sectioning adjacent parts in an assembly drawing, how must the hatching differ between parts?

Accepted Answer

Adjacent parts must have different hatch angles or spacing to visually differentiate them

Answer

In assembly sections, adjacent parts must use different hatch angles (e.g., 45°, 135°, 30°) or different spacing so each component can be instantly distinguished from its neighbors.

Question 3

What is a secondary auxiliary view?

Accepted Answer

A view projected from a primary auxiliary view to reveal the true shape of an oblique (double-inclined) surface

Answer

A secondary auxiliary view is projected from a primary auxiliary view to show the true shape of an oblique surface that is inclined in two directions and cannot be shown true size in any single primary auxiliary view.

Question 4

Which standard parts are typically NOT sectioned even when the cutting plane passes through them in an assembly section?

Accepted Answer

Bolts, nuts, shafts, pins, keys, and ball bearings

Answer

Standard fasteners and machine elements such as bolts, nuts, shafts, pins, keys, and bearings are shown in exterior view even when cut, because sectioning them adds no useful design information.

Question 5

In a half-section view, what type of line separates the sectioned half from the unsectioned half?

Accepted Answer

A centerline (thin chain line) coinciding with the axis of symmetry

Answer

The dividing line in a half-section is the centerline of the object's symmetry — a thin chain line — because the cut extends to the axis of symmetry rather than through a physical boundary.

(CDT) Certified Drafting Technician Practice Test

(CDT) Certified Drafting Technician Practice Test

CDT Sectional Views & Auxiliary Views 3