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

A section where the cutting plane and the resulting view are both aligned with the sheet border

Answer

A section drawn parallel to the longest axis of symmetry of the object

Answer

A section aligned to the centerline of the nearest principal view

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

All parts use the same angle and spacing to indicate they belong to the same assembly

Answer

Only the largest part is hatched; all smaller adjacent parts are left blank

Answer

Color coding replaces hatching variation in assembly section views

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 backup view created when the primary auxiliary view is unclear or cluttered

Answer

The second of the two standard auxiliary views required by ASME for complex parts

Answer

A view projected at exactly 90° from the primary auxiliary regardless of the surface angle

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

Flanges, hubs, and large housings

Answer

Gaskets, seals, and O-rings

Answer

Brackets, mounts, and base plates

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

A visible object line indicating the boundary of the cut

Answer

A dashed hidden line showing the theoretical edge of the cut

Answer

A freehand break line similar to those used in broken-out sections

Question 6

What is the primary advantage of an auxiliary view over a standard principal view for an inclined surface?

Accepted Answer

The true size and shape of the inclined surface are preserved, eliminating foreshortening distortion

Answer

Auxiliary views are always drawn at a larger scale, making features easier to dimension

Answer

Auxiliary views remove the need for hidden lines in all adjacent principal views

Answer

ASME requires auxiliary views for any surface inclined more than 30° from a principal plane

Question 7

In an offset section, what is shown at the bends of the cutting plane line in the resulting section view?

Accepted Answer

No line is shown at the bends — they are suppressed to avoid creating false impressions of object edges

Answer

Arrows indicating the new direction of the cutting plane at each bend

Answer

Dashed lines at each transition showing where the plane changes direction

Answer

Circular arcs connecting the straight segments of the cutting plane