The cutting-plane line indicates the edge view of a cutting plane, revealing internal features of an object, with the viewing direction shown by arrows. There are seven types of sections: full, half, broken-out, revolved, removed, offset, and aligned sections. A short-break line denotes the boundary of a broken-out section, and in a half section, a quarter of the object is imagined to be cut away.

1. What does the cutting-plane line represent? List and explain seven different types of sections.
What type of line is used to show the boundary of a broken out section? How much of an object
is imagined to be cut away in a half section?
Solution
1) Generally the cutting-plane line represents the edge view of the cutting plane, in order to show
the inside features of the object. The viewing direction is represented by arrows.
2) Seven different type of sections:
i) Full section,
ii) Half section
iii)Broken-out section
iv) Revolved sections
v) Removed sections
vi) Offset sections
vii) Aligned sections.
3) A short-break line is used to show the boundary of a broken-out section
4) A quarter of the object (1/4th) is imagined to be cut away in a half section.