A section view shows what an object looks like after it is cut by a plane. In SPM Engineering Drawing it is how internal features are made clear without a tangle of dashed lines.
This page sits inside SPM Engineering Drawing. Use it to see how the lessons connect and where to begin.
What does this cluster cover?
The cluster starts with reading the cutting plane, then draws the section, then asks what the section reveals and finally corrects a faulty one.
The lessons follow that order:
- Interpret a stated cutting plane shows how to read where and which way the cut goes.
- Represent the visible section of a simple original solid teaches the drawing order.
- Explain which internal features a section reveals links the cut to what you see.
- Compare an inconsistent section with its corrected diagram teaches error-finding.
How do the parts connect?
The cutting plane decides which part is removed. That choice decides which faces are cut and which edges stay visible behind them.
Once you can read the plane, the section follows. Checking a wrong section then means asking whether each line agrees with the stated cut.
One small example to orient you
A block is 60 mm long and has a round hole of 20 mm diameter drilled through its full height. A cutting plane passes through the centre of the hole.
The cut face is two solid strips of 20 mm each, because 60 − 20 = 40 and 40 ÷ 2 = 20. The hole appears as an empty gap 20 mm wide between them, which a plain front view would show only as dashed lines.
Where should you start?
If sections are new, begin with the cutting plane lesson. If you can read the plane but your section views lose marks, go to the lesson on the visible section.
Test yourself with the sections practice set. The views you cut come from orthographic views, and pictorial representations helps you picture the solid.
For a teacher to go through your own section questions, see online one-to-one Engineering Drawing tuition.