# What is principal plane in CAD?

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## What is the principal plane?

a plane that is perpendicular to the axis of a lens, mirror, or other optical system and at which rays diverging from a focal point are deviated parallel to the axis or at which rays parallel to the axis are deviated to converge to a focal point.

## What is principal plane in engineering drawing?

projection. 1 A plane of projection (POP) is a plane on which a particular. view is projected. 2 Three such planes, perpendicular to each other, are called. principal planes or reference planes (RP).

## Where is the principal plane?

The plane that is perpendicular to the optical axis of a lens and that passes through the optical centre. A thick lens has two principal planes, each passing through a principal point.

## What are the six principal views?

What are the six principal views of an object? Front, top, right side, left side, rear, and bottom. True or False? There are an unlimited number of possible directions for an auxiliary view, depending on the angle of features within an object.

## What is principal stress and plane?

Principal stresses are maximum and minimum value of normal stresses on a plane (when rotated through an angle) on which there is no shear stress. Principal Plane. It is that plane on which the principal stresses act and shear stress is zero.

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## Why is front view the principal view?

In multiview projection, the object is viewed perpendicular to the main faces, so that only one face of the object is depicted in each view. Main principles of creating multiview projections: The most informative (descriptive) view of the object to be represented is normally chosen as the principle view (front view).

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

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.

## What are the 4 orthographic views?

An orthographic projection is a way of representing a 3D object by using several 2D views of the object. Orthographic drawings are also known as multiviews. The most commonly used views are top, front, and right side.