What is the projection of solid?

A solid is a three dimensional object having length, breadth and thickness. It is Completely bounded by a surface or surfaces, which may be curved or plane. The shape of a solid is described orthographically by drawing its two orthographic projections, usually, on the two principal planes of projection i.e., HP and VP.

Which of the following is correct for 1st angle projection?

Explanation: In the first angle projection the top view of the object is below the front view and then come the side views to the left and right of front view and then back view which can either be kept on ends of side views but as standard notation it is placed on right side of right side view.

How many faces does a square pyramid have?

5Square pyramid / Number of faces

How do you project a solid?

the solids are placed initially in the simple position and then one or two auxiliary planes are setup to obtain the views in the required position. one of the square faces containing that edge is inclined at 300 to HP and the edge on which it rests being inclined to 600 to VP. Draw its projections.

How do you draw a projection of points?

To draw the projections Draw the reference line XY. Mark a point a’ at a distance of 20 mm above XY. Through this point draw a perpendicular line to XY and mark the top view a at a distance of 300 mm below XY.

What are the examples of prism?

Examples of Prism

• Corrugated Box. Corrugated boxes are generally manufactured in the shape of a cube or a cuboid.
• Books and Notebooks. Books and notebooks are yet another example of the prism-shaped objects present around us.
• Rubik’s Cube.
• Ice Cubes.
• Tents.
• Chocolate Bar.
• Buildings.
• Clocks.

What is projection of solids in engineering drawing?

This is the simplest position in which a solid can be placed. When the solid is placed with the base on HP position, in the top view, the base will be projected in its true shape. Hence, when the base of the solid is on HP, the top view is drawn first and then the front view and the side views are projected from it.

Why we use only 1st and 3rd angle projection?

We consider that horizontal plane rotates in clockwise direction after having projection on it. that’s why we use 1st angle and 3rd angle projection. because only in this two quadrants we will get the both views after clockwise rotation of horizontal plane.

What is square pyramid explain with an example?

A square pyramid is a three-dimensional shape that has a total of five faces, hence called a pentahedron. A most famous example of such a pyramid in real life is the Great Pyramid of Giza.

What is isometric projection and give example?

Isometric-projection definition The definition of isometric projection is a two-dimensional representation for viewing a three-dimensional object with the three primary lines equally tilted away from the viewer. An example of isometric projection is a technical drawing of a house.

What are the different types of projections of solids?

Axis inclined to the V.P. and parallel to the H.P. b. Axis inclined to the H.P. and parallel to the V.P. 4. Projections of solids with axes inclined to both the H.P. and the V.P. 5. Projections of spheres. Types of Solids Solids may be divided into two main groups: i. Polyhedron ii. Solids of revolution. i.

What is an prism?

Prism: This is a polyhedron having two equal and similar faces called its ends or bases, parallel to each other and joined by other faces, which are parallelograms. The imaginary line joining the centers of the bases is called the axis.

When a solid is placed on the axis inclined to horizontal projection?

When a solid is placed on the HP with axis inclined to horizontal plane of projection , the elemental portion of the solid that lies on H.P depends upon the type of solid.

How do you cut a hexagonal prism?

A hexagonal prism of side of base 35mm and axis length 55mm rests with its base on HP such that two of the vertical surfaces are perpendicular to VP. It is cut by a plane inclined at 50® to HP and perpendicular to VP and passing through a point an the axis at a distance 15mm from the top.