CDT Sectional Views & Auxiliary Views 2

Question 1

What is an offset section?

Accepted Answer

A section that uses a stepped cutting plane to pass through multiple features not in the same plane

Answer

A section view displaced to the side of the main drawing for clarity

Answer

A section taken at an oblique angle rather than parallel to a principal plane

Answer

A section where the hatching is offset from the standard 45° angle

Question 2

What is a revolved section used for?

Accepted Answer

To show the cross-sectional shape of an elongated feature such as a spoke or rib by rotating it 90° in place

Answer

To show a rotating mechanism in each of its operating positions

Answer

To depict the same object from two rotated viewpoints on one sheet

Answer

To indicate that a part may be installed in multiple orientations

Question 3

How does a removed section differ from a revolved section?

Accepted Answer

A removed section is placed at a separate location on the drawing rather than rotated in place on the view

Answer

A removed section shows exterior surfaces while a revolved section shows interior features

Answer

A removed section uses a different hatching material symbol than a revolved section

Answer

A removed section is always drawn at a larger scale than the parent view

Question 4

At what angle are standard general-purpose section lines (hatching) typically drawn?

Accepted Answer

At 45° to the principal lines of the view outline

Answer

At 30° to the horizontal

Answer

At 60° to the nearest object line

Answer

Horizontally at 0° for all general materials

Question 5

Why are thin features such as ribs and webs typically left unhatched even when the cutting plane passes through them?

Accepted Answer

Hatching them would falsely suggest a heavy solid cross-section, misrepresenting their structural role

Answer

They are too thin for hatching lines to be drawn legibly at standard scale

Answer

ANSI standards exempt all features thinner than 6 mm from sectioning requirements

Answer

They are always shown as hidden lines regardless of whether the cutting plane intersects them

Question 6

A primary auxiliary view is projected from which view on a drawing?

Accepted Answer

From whichever principal view shows the inclined surface as a true edge (straight line)

Answer

Always from the front view, regardless of the inclined surface orientation

Answer

Always from the top view so that depth dimensions are preserved

Answer

From a secondary auxiliary view in a two-step projection process

Question 7

What is the purpose of a partial auxiliary view?

Accepted Answer

To show only the inclined surface and adjacent features, omitting information already clear in principal views

Answer

To provide a reduced-scale version of the full auxiliary view to save drawing space

Answer

To show a section cut taken at an angle through the inclined surface only

Answer

To display hidden lines that cannot appear in the primary auxiliary view