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Showing posts with label ENG-DWG. Show all posts

Monday, 21 November 2016

Engineering Drawing Question Answers

1) Geometrical construction which are mostly based on plane geometry and
which are very.......

a) Accuracy

b) Quality

c) Essential

d) Superior quality

2) How much method of drawing the regular polygons.......

a) Inscribe circle method and arc method

b) General method for drawing any polygon

c) Alternative method

d) All of these

4) Which method of constructing triangl in circle......

a) Inscribing

b) Describing

c) Both a and b

d) None of these

5) When two sides of the hexagon are required to be horizontal the
starting point for stepping equal division should be on an end of the.....

a) Horizontal diameter

b) Vertical diameter

c) Inclined diameter

d) None of these

6) If two sides of hexagon are required to be vertical the
starting point should be on an end of the....

a) Inclined diameter

b) Horizontal diameter

c) Vertical diameter

d) None of these

7) The section obtained by the inter section of the right

circular cone by a plane in different position relative to

the axis of the cone are called.......

a) Conics

b) Circles

c) Triangles

d) Half circle

8) When the section plane is inclined to the axis and cuts all the generators on one side on a apex the section is in......

a) Conic section

b) Ellipse

c) Parabola

d) Hyperbola

Sunday, 20 November 2016

DRAWING ANGLES WITH SET SQUARES

Set squares are used in conjunction with T-squares to draw accurate angles.
There are two main types of set square.
One has an angle of 45 degrees and the other 30/60 degree angles.

The 45 degree set square also has a 90 degree angle.

This can be used for drawing vertical lines.

The 30/60 degree set square also has a 90 degree angle.

This set square can be used to draw 30, 60 or 90 degrees angles.

ORTHOGRAPHIC DRAWING

INTRODUCTION TO THIRD ANGLE ORTHOGRAPHIC DRAWING

Orthographic drawing is a way of drawing a three dimensional object. Normally the object is drawn as three separate, related views - Front View, Side View and Plan View.

The example below shows a simple shaped block, with a hole drilled all the way through.

The front view, is a drawing of the block, as if you are looking directly at the front of the object.
The side view, is a drawing of the block, when it has been rotated so that one of its sides is now directly in view.
The plan view, is a ‘birds eye’ view, from above.

Dotted lines represent ‘hidden detail’. In this case they represent the hole, through the block/object

The front, side and plan views are arranged in the positions shown below. They must be drawn accurately.

Draw the front view first, followed by the side view. The plan view is drawn directly above the front view. Note, a 45 degree line allows the projection of the side view to the plan view

Dimensions (measurements) are added to the completed views. Usually six dimensions are added. This enables anyone looking at the orthographic drawing, to work out the overall size of the object. More dimensions can be added if necessary. Dimensions are drawn on each of the views.

Saturday, 27 June 2015

Types of lines

Types of lines generally used in drawings

All visible edges are to be represented by visible lines. This includes the boundary of the object and intersection between two planes. All hidden edges and features should be represented by dashed lines..

Figure 1 shows the orthographic front view (line of sight in the direction of arrow)of an object. The external boundary of the object is a rectangle and is shown by visible lines. In Figure-1(a), the step part of the object is hidden and hence shown as dashed lines while for the position of the object shown in figure-1(b) , the step part is directly visible and hence shown by the two solid lines.