Question

2-When the line is parallel to both VP and HP, we can get its True length in

Answer 1

Explanation:

The projected length on the plane to which it is inclined will always be shorter than the true length. In figure 2, the line AB is parallel to VP and is inclined to HP. The angle of inclination of AB with HP is being θ degrees. Projection of line AB on VP is a'b' and is the true length of AB.

Answer 2

Answer:

We can determine a line's true length in top and front views when it is parallel to both VP and HP.

Explanation :

• We can determine the line's actual length in front view and side view when it is perpendicular to HP and parallel to VP.
• A line will not meet the horizontal or vertical planes if it is parallel to both of them, thus it won't have traces on those planes, but it will have a trace on the profile plane.

Below are some examples of potential surface orientations with regard to the primary planes.

1. The plane's surface is parallel to the HP (and perpendicular to the V.P.).
2. The plane's surface is parallel to vertical plane (and perpendicular to the H.P.).
3. The plane's surface is parallel to the profile plane and perpendicular to both H.P. and V.P.
4. The plane's surface is perpendicular to the V.P. and inclined to the H.P.
5. The plane's surface is perpendicular to the H.P. and inclined to the V.P.
6. The plane's surface slopes both upward and downward.

• A line's top view will be narrower if it is parallel to V. P. and inclined to H. P. A line's front view will be narrower if it is parallel to HP and inclined to HP.

• A plane that is not parallel to any of the major planes will come to rest in a line that, if necessary, will be extended. Trace of the plane is the name of this line.

• When a plane crosses a horizontal point in a line, the line is referred to as having a horizontal trace (H.T.). The line is known as a vertical trace (V.T.) when a plane crosses a vertical point in a line and is, if necessary, extended.

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