Computer aided design There are two types of computer-aided design systems used for the production of technical drawings: two dimensions (“2D”) and three dimensions (“3D”).

The graphics are also very important form of communication. Engineering graphics is the language used by engineers to transfer ideas and information needed for the construction of technical devices and systems. This language includes drawings, sketches, plans, schedules, diagrams, notes and instructions.

An engineering drawing is a type of technical drawing used to define the requirements for engineering products or components. It may also describe the process of making the item, may be used to convey engineering ideas during the design process, or may provide a record of an existing item.

Technical drawing is hard, yes, but it is doable. Once you teach yourself to like technical drawing then you will have the willpower and motivation to get better at it. HB pencil gives your technical drawings enough clarity and precision while keeping smudging to a minimum.

Its preety easy,just do the drawings of the practice plates yourself following the right procedure and half of your work is done. Its all about knowing how to go about a particular drawing and with a bit of practice and solving of common questions you can do well in exams,and it is a very scoring subject too.

8 Tips For Improving Your Drawing Skills

1. Go draw something. Repeat.
2. Look at drawings. Whether simple line drawings or meticulously detailed renderings, you can learn a lot from looking at the work of others.
3. Draw from drawings.
4. Draw from photographs.
5. Draw from life.
6. Take a class.

3rd Angle project is where the 3D object is seen to be in the 3rd quadrant. It is positioned below and behind the viewing planes, the planes are transparent, and each view is pulled onto the plane closest to it. The front plane of projection is seen to be between the observer and the object.

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Answer: The angle at which an observer draw an object to convert it from 3D to 2D plane such as real object image to a plane paper is known as angle of projection.

(1) where U is the initial velocity, θ is the angle of projection and g is the acceleration due to gravity. The horizontal distance covered by the projectile i.e. range is given by, R=U2Sin2 θ g… Hence the angle of projection should be 36.86 degrees.

As per rule of projection when horizontal plane is rotated 90 degree in clockwise direction, top and front view will overlap. Overlapping projection views create confusion in the drawing. Therefore 2nd angle projection system is not used. Therefore fourth angle projection is also not used.

This symbol indicates the projection method used in the drawing. When the large end of the cone in the section view is closest to the top view, this is known as first angle projection. Traditionally, the first angle projection symbol is drawn with the top view on the left and the side view on the right.

There are two main types of projection:

• A. Parallel and Orthographic.
• Station-point and Perspective.
• Parallel and Convergent.
• Perspective and Parallel.

Steps used to create an orthographic projection

1. Choose a front view.
2. Decide how many views are needed to completely describe the object.
3. Draw the visible features of the front view.
4. Draw projectors off of the front view horizontally and vertically in order to create the boundaries for the top and right side views.

orthogonal projection

Isometric: a method of representing three-dimensional objects on a flat surface by means of a drawing that shows three planes of the object. Orthographic: a method for representing a three-dimensional object by means of several views from various planes.