PROJECTION OF POINTS-SHORT QUESTION ANSWERS

https://www.mesubjects.net/wp-admin/post.php?post=6090&action=edit    Q. ANS. Engineering Drawing-1

https://www.mesubjects.net/wp-admin/post.php?post=6087&action=edit      Q. ANS. Engineering Drawing-2

https://www.mesubjects.net/wp-admin/post.php?post=3748&action=edit       Q. ANS. Engineering Drawing-3

https://www.mesubjects.net/wp-admin/post.php?post=3768&action=edit           Q. ANS. Drawing Scales-1

https://www.mesubjects.net/wp-admin/post.php?post=6139&action=edit              Q. ANS. Drawing Scales-2

https://www.mesubjects.net/wp-admin/post.php?post=10220&action=edit   Q. ANS. Projection Points

https://www.mesubjects.net/wp-admin/post.php?post=7335&action=edit        MCQ Projection of Planes

https://www.mesubjects.net/wp-admin/post.php?post=7329&action=edit        MCQ Projections Straight Line

https://www.mesubjects.net/wp-admin/post.php?post=7270&action=edit       Orthographic Projections

https://www.mesubjects.net/wp-admin/post.php?post=6141&action=edit           Q. ANS. Projections Line

https://www.mesubjects.net/wp-admin/post.php?post=3785&action=edit       Q. ANS. Projections

https://www.mesubjects.net/wp-admin/post.php?post=3756&action=edit        Q. ANS. Projection Planes

PROJECTION OF POINTS- SHORT QUESTION

ANSWERS

Projection of a point is used to show the location of a light or a fan point in a building drawing. Two points forms a line.

Q. Describe the position of points in the various quadrants and its projections

with respect to the reference line x y.

A.

Quadrant  Position Position of front view  Position of top view

1st

In front of VP and above HP

Above x y

Below x y

2nd

Above HP and behind VP

Above x y

Above x y

3rd

Behind VP and below HP

Below x y

Above x y

4th

Below HP and in front of VP
Below x y
Below x y

Q. Discuss some key features about the projection of points.


A.
(i) Distance of the front view is always from the HP.
(ii) Top view distance is always from the VP.
  • If distance is above HP, front view is above x y and vice versa.
  • If point is in front of VP, top view is below x y and vice versa.

Q. How are the projections of a point marked for its front view and top view?

A.
(i) Front view is marked by a small alphabet with a dash. For example, the front view of point H will be h’.
(ii) Top view is marked by a small alphabet without a dash. The front view of point H will be h.
  • Point as such is written by a capital alphabet as H.

Q. Which are the types of projections mostly used in engineering drawing?

A.
Orthographic projections are most commonly used projections. These are done on HP, VP and PP planes. Since projections are done on a plane, these projections are 2 dimensional.

Q. What are the different methods of projections in use?

A.
First and third angle projections are in common use.

First Angle Projection

Third Angle Projection

Object lies in the first quadrant.
Here the object lies in the third quadrant.
When object is in between the observer and the vertical plane.
Vertical plane is in between the observer and the object.
Front view is on the back,
In this, front view is on the front,
Right side view is on left and so on.
right side view is on right and so on