- When a point is above HP and behind VP The point is resting in which Quadrant *?
- When the axis of solid is perpendicular to HP?
- When a solid is placed on HP?
- When the axis of solid is perpendicular to VP which view should be drawn first?
- Which is not a polyhedra?
- What is 1st angle of projection?
- When a point is above HP and behind VP it is in?
- What is point projection?
- When a plane is perpendicular to VP and parallel to HP its front view will be?
- What is the minimum number of orthographic views required to fully describe an object?
- What is projection types of projection?
- What are the three typical orthographic view of a drawing?
- In which quadrant the HP comes above XY line and VP comes below XY line for orthographic projection?
- When an object is cut by a section plane parallel to HP and perpendicular to VP?
- Which grade of pencil is used for drawing arrowheads?

## When a point is above HP and behind VP The point is resting in which Quadrant *?

Explanation: The position of reference planes will be similar to quadrants in x, y plane co-ordinate system.

As the 2nd quadrant lies above the x-axis and behind the y-axis here also the 2nd quadrant is above H.P, behind V.P..

## When the axis of solid is perpendicular to HP?

Explanation: When the axis of solid is perpendicular to H.P it is indirectly saying that the base is parallel to the horizontal plane so the projection on to it gives true shape of the base and then we can project and find the other dimensions. 4.

## When a solid is placed on HP?

Only one position in which a cylinder or a cone may be placed with its base on HP. When a solid is placed with its axis perpendicular to VP, the base of the solid will always be perpendicular to HP and parallel to VP.

## When the axis of solid is perpendicular to VP which view should be drawn first?

17. Therefore, the projection of a solid on the plane to which its axis is perpendicular will show the true shape and size of its base. Hence, when the axis is perpendicular to the ground, i.e. to the H.P., the top view should be drawn first and the front view projected from it.

## Which is not a polyhedra?

Non-polyhedrons are cones, spheres, and cylinders because they have sides that are not polygons. A prism is a polyhedron with two congruent bases, in parallel planes, and the lateral sides are rectangles.

## What is 1st angle of projection?

First angle projection is a method of creating a 2D drawing of a 3D object. It is mainly used in Europe and Asia and has not been officially used in Australia for many years. In Australia, third angle projection is the preferred method of orthographic projection. Note the symbol for first angle orthographic projection.

## When a point is above HP and behind VP it is in?

Projection of Points • There are basically nine type of projections of point is space : 1. In FIRST Quadrant (Above H.P. , In front of V.P.) 2. In SECOND Quadrant (Above H.P. , Behind V.P.) 3. In THIRD Quadrant (Below H.P. , Behind V.P.) 4.

## What is point projection?

Quadrant system: The picture planes used for obtaining the orthographic projections are called the Principal planes of projection or reference planes or co- ordinate planes of projection. VP: The plane in front of observer is the vertical plane. (VP) or it is also called a Frontal plane.

## When a plane is perpendicular to VP and parallel to HP its front view will be?

Explanation: As the required plane is perpendicular to both horizontal plane and vertical plane the top view and front view gives a line in projections so only from side which is perpendicular to both the plane as the required plane the object will appear clearly isometric view also will not give vivid picture. 3.

## What is the minimum number of orthographic views required to fully describe an object?

To completely define an object, at least two orthographic views are required. Depending on the complexity of the part, three or more views are required.

## What is projection types of projection?

Following are the types to projections: One Point (one principal vanishing point) Two Point (Two principal vanishing point) Three point (Three principal Vanishing point) Cavalier Cabinet Multi view Axonometric Isometric Dimetric Trimetric Projections Parallel Projections Perspective Projections Orthographic ( …

## What are the three typical orthographic view of a drawing?

The standard views used in a three-view drawing are the top, front and the right side views Page 16 The width dimensions are aligned between the front and top views, using vertical projection projection lines.

## In which quadrant the HP comes above XY line and VP comes below XY line for orthographic projection?

As the 1st quadrant lies above the x-axis and in front of the y-axis here also the 1st quadrant is above H.P, in front of V.P.

## When an object is cut by a section plane parallel to HP and perpendicular to VP?

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. For ex – Frustum , which is initially a cone , but it is cut by a section plane, parallel to H.P. and perpendicular to V.P. , top view is obtained.

## Which grade of pencil is used for drawing arrowheads?

Explanation: Arrowheads resembles the extent of dimensions. It should be sharply defined and uniform throughout the drawing. Generally, 3 mm in length is used. For such precision small diameter pencils are used, hence 2H is used as arrowheads.