Answer / sushil kumar giri

because in 2nd and 4th angle projection topview and frontview overlap each other.

Answer / naveen

as 1st and 3rd angle projections r clearly viewed by the
person and easy to understand these views wher the front
view and rear view is been clearly viewed so in order to
avoid confussion and make it clear and wher as in 2nd and
4th angle the top view and front view is overlapped so they
r using 1st and 3rd angle projections are been used in
companies

Answer / nafees ansari

Method of Projections tell us the positions of the views where they are projecting on the Planes. Consider 1st Angle of projection, All the views from a particular direction are projected on the opposite side, while in 3rd Angle of projection, All the views from a particular direction are projected on the same side. Take a case of 2nd Angle of Projections( means object lies in 2nd Quadrant) since the image is to be formed on the planes only that is why we have to keep right side view on the same side from viewing while top view on the opposite side from viewing. This contradicts view placement( i.e. once you are placing on same side and once on Opposite). Same is applicable in 4th Angle of Projection also.

Answer / deepak7285

when we use second n fourth angle projection the views overlap

Answer / rohit

Mr. sushil giri is absolutely correct

Answer / arpit

In India first and third angle being use as its easy to understand while asa uses 2nd and 4 th

Answer / arpit srivastava

Dear friend, Nobody uses 2nd and 3rd angle projections.
As per standard rule in N.D. Bhatt, when obtaining the
views,
1st and 3rd should never be closed.

Else the views will overlap.

I thik it is asy for u to remember.

For any issues, feel free to contact with :-
arpit_srivastava@3dplmsoftware.com

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