Option 1 : Top view

ST 5: Construction technology

1141

20 Questions
20 Marks
24 Mins

__Different types of planes are:__

1.** Reference plane:** In general, two planes are employed for projection and are known as reference planes or principal planes of projection. These planes intersect at a right angle to each other.

2. **Vertical plane (V.P.):** The plane which is vertical is called a vertical plane and is denoted by V.P. Vertical plane is also known as frontal plane since the front view is projected on this plane.

3. **Horizontal plane (H.P.):** The plane which is horizontal but at a right angle to the VP. is called the horizontal plane.

4. **Auxiliary plane (A.P.):** Any other plane, placed at any angles to the principal planes, is called an auxiliary plane.

5. **Profile plane (P.P.):** The plane which is at right angles to the two principal planes is called auxiliary vertical plane (A.V.P.) or profile plane (P.P.).

__Types of views are__

1. **The front view** is the **view of the object obtained on the V.P**. by drawing projectors perpendicular to V.P. from the various corners of the object.

2. **The top view** is the **view of the object obtained on the H.P**. by drawing projectors perpendicular to H.P. from the various corners of the object.

3. **The side view** is the **view of the object obtained on the P.P**. by drawing projectors perpendicular to P.P. from the various corners of the object.

**So when an object is cut by a section plane parallel to H.P and perpendicular to V.P, then the sectional view of the object is obtained in top view.**