All Engineering Trades engineering drawings for practice

 ENGINEERING DRAWING

Introduction and its importance

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Common for all Engineering Trades Engineering Drawing
Electrical Engineering drawings
Wiring diagrams of homes and industries, circuit diagrams.

electrical installation drawings etc.

Electronics Engineering drawings:

Circuit drawings, PCB tracks drawings, etc.

Civil Engineering drawings

Plan, front elevation of homes to be built, foundation drawings, etc.,

Conventions

Drawing paper: These are of two types:

• Hand-made paper

• Mill-made paper

slightly large size (untrimmed) sheets are preferred. They

are trimmed afterward. IS:10811:1983 lays down such as

designation of preferred trimmed and untrimmed sizes.

The basic principle involved in arriving at the sizes of the

drawing paper is as under. The area of the biggest size (A0)

Designation Trimmed size Untrimmed size

A0 841 x 1189 880 x 1230

A1 594 x 841 625 x 880

A2 420 x 594 450 x 625

A3 297 x 420 330 x 450

A4 210 x 297 240 x 330

A5 148 x 210 165 x 240

Exceptional elongated series
Designation Size

A0 x 2 1189 x 1682

A0 x 3 1189 x 2523

A1 x 3 841 x 1783

A1 x 4 841 x 2378

A2 x 3 594 x 1261

A2 x 4 594 x 1682

A2 x 5 594 x 2102

A3 x 5 420 x 1486

A3 x 6 420 x 1783

A3 x 7 420 x 2080

A4 x 6 297 x 1261

A4 x 7 297 x 1471

A4 x 8 297 x 1682

A4 x 9 297 x 1892

Sl. No. Designation Size (mm)

1 D0 1500 x 1000 x 2

2 D1 1000 x 700 x 25

3 D2 00 x 500 x 15

4 D3 500 x 350 x 15

Standard drawing boards are designated as follows a

IS:1444-1989.

Sl. No. Designation Blade length

1 T0 1500

2 T1 1000

3 T2 700

4 T3 500

The standard ‘T’ square is designated as follows with dimensions are shown in mm; as per IS:1360-1989.

‘T’ square

Drawings are made up of different types of lines

Draw the given types of lines using 0.5 range thickness of line according to the specification

lines

number of sides as given below Name No. of sides

several sides as given below: 

Name No. of sides Pentagon (Fig 2)

Pentagon

a)            Pentagon Five sides

b)            Hexagon Six sides

c)            Heptagon Seven sides

d)            Octagon Eight sides

e)            Nonagon Nine sides

f)             Decagon Ten sides

g)            Undecagon Eleven sides

h)            Duodecagon Twelve sides

Properties of polygon

• All corners of a regular polygon lie on the circle. The

sides of a regular polygon will be tangential to the circle

drawn in the side.

• The sum of the interior angles of a polygon is equal to

Types of Polygons

Elements of an ellipse

 

Engineering Drawing