Sureshiisj

Orthographic projection gives us views of objects from a particular direction only. Looking from the front, we get front elevation and from the top, we get a plan or the top view. The orthographic projection is complete in one direction only. To have an entire detail, we need to prepare at least three different views from three different directions. Still, for a quick reference, a pictorial view will be a better option.  We have several ways of drawing pictorial drawings on a two-dimensional plane. It can be a perspective or oblique or isometric pictorial drawing. For Engineering Graphics, we usually use isometric projection to obtain the pictorial impression. In isometric projection, there are three principal axes inclined to each other at an angle of 120 degrees. The corresponding planes are the horizontal plane, the vertical plane, and the profile plane.  For machine blocks, we usually practice with simple cubes, prisms, and pyramids with different orientations. The sol...

 An isometric scale is used for isometric projection. Most of the drawings on a plain sheet of paper are 2-dimensional. We can use three axes at 120o with each other to indicate three dimensions of an object. This generally helps in creating 3-dimensional drawings on a 2D plane.  CBSE Class 12 has isometric scale construction as an essential construction skill.  The steps of construction are as follows; (1) Draw a horizontal line.  (2) Draw an inclined line at 45o with east which is the default 0o.  (3) Using your roller, divide the given true length on the inclined line. If you have to draw an isometric scale of 70 mm, then draw the line of up to 80.  (4) Keep the first 1 cm for dividing into 10 equal parts of  1 mm. Thereafter, divide the length into the required number of equal parts.  (5) Draw another line at 30; with default east.  (6) Draw a vertical line at 30.  (5) Take the height of the line as 4 mm and complete the scale. ...

CBSE Curriculum of Engineering Graphics is designed to create lifelong learners with sharp thinking skills. Especially the creators of different spheres find the nuances elucidated in this subject very enriching.  CBSE has outlined the following objectives for this course: Objectives: The study of the subject of Engineering Graphics at the Senior School Level aims at helping the learner to:  develop clear concepts and perceptions of different objects.  develop a clear understanding of plane geometry, solid geometry, and machine drawing so as to apply the same in relevant practical fields such as technology and industry.  develop the skill of expressing two-dimensional and three-dimensional objects in professional language and vice versa.  acquire speed and accuracy in the use of drawing instruments.  acquire the ability to readily draw neat sketches, often needed in "On-job situations".  use technology (CAD) in developing isometric and orthographic pro...