Engineering Drawing Notes Free Download

Engineering Drawing Pdf 1st Year Notes & PPTs – EDP Pdf Notes

Engineering Drawing Pdf

In this Engineering Drawing 1st Year Notes Contents :-

Scales
Engineering Curves – I
Engineering Curves – II
Loci of Points
Orthographic Projections – Basics
Conversion of Pictorial View into Orthographic Views
Projections of Points and Lines
Projection of Planes
Projection of Solids
Sections & Development
Intersection of Surfaces
Isometric Projections
Exercise
Solutions – Applications of Lines.

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Frequently Asked Questions

Q1: What is a circle and its components while considering engineering drawing?

A1: A closed curve which has a center point and all the points on the curve are at the same distance from the center point. Major components of the circle include,

Diameter: The straight distance from a outside curved surface to the opposite outside curved surface through the center point
Radius: The distance between the center point and the outside curved surface is called radius. Half the diameter is called radius. It is used to set the compass when drawing a diameter
A central angle: An angle formed by two radial line from the center of the circle
Sector: Area of a circle lying between two radial lines and the circumference
Quadrant: A sector with a central angle of 90 degree and with one of the radial lines oriented horizontally
Chord: A straight line whose opposite ends terminate on the circle
Segment: Smaller portion of the circle which is separated by the chord
Concentric circles: Two or more circles with a same center point
Eccentric circles: Two or more circle with out a common or same center point
Semi circle: Half of a circle

Q2: What is multi view projections?

A2: Primary means of graphic communication which is used in engineering work is called multi view orthographic projection. To convey ideas, shapes, dimension, procedures, for the manufacture or the construction, drawings are used in engineering. Orthographic projection is the basis of all descriptive geometry procedures. Where as, mutli view projection is a procedure that can be used to completely describe an object's dimension or shape using two or more (multi) views that are normally projected at 90 degree to each other or at any other specified angles. Engineering work is completely based on this method of projection. Final design is then reproduced and sent to the job site or the shop.

Q3: What are the two fundamental methods of shape representation used in engineering drawing?

A3: Theory of projection is the base for the background information necessary to shape representation in graphics. There are two fundamental methods of shape representation given below

Orthographic view: This view consists of two or more separate views of an object which has been taken from different directions, generally at right angles to each other and arranged relative in a definite way to each other. Each view shows the shape of an object for a particular view direction and collectively the views describe the given object completely.
Pictorial view: For this view either oblique projection or perspective projection is used in which the object is oriented behind and projected up on a single plane.

Q4: What are the four principal types of projection?

A4: Four principal type of projection are,

Multi view projection
Axonometric projection
Oblique projection
Perspective projection

Q5: What are the classification of axonometric projections?

A5: Different classification of axonometric projections are

Isometric projection
Dimetric projection
Trimetric projection

Q6: What are the different multisection views?

A6: Different kinds of multi section used today are,

Full section
Offset section
Half section
Broken our section
Revolved section
Auxillary section

Q7: What are the classification of lines in orthographic projection?

A7: Classification of lines in orthographic projection is based on parallelism, direction, and type

Classification based on parallelism

A horizontal line
A frontal line
A profile line

Classification based on direction

Vertical line
Level line
Inclined line

Classification based on type

Oblique
Foreshortened
Point view
True length

Q8: What is the purpose of dimensioning and what are the guidelines?

A8: To provide a clear and complete description of an object is the main purpose of dimensioning. A pure, complete set of dimension permits only one interpretation needed to construct the part. The process of dimensioning should follow the below guidelines

Accuracy
Clearness
Completeness
Readability

Q9: What are the examples of engineering drawing?

A9: