Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (b): Scales
1. Representative fraction (R.F) of the scale. 2. The maximum length of scale to be drawn on the drawing sheet. 3. Least count of the scale, ie., the minimum length which the scale should measure.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (b): Scales
The special scales which are prepared according to our requirement are basically classified into four types as below:
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (b): Scales
Standard Scales, recommended by BIS are readily available in sets of 8 scales, for the use in engineering practice.
Examples | Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (b): Scales
The Bureau of Indian Standards (BIS) recommends the following scales, any one of which may be choosen for a particular drawing depending upon the size and complexity of the object and the size of drawing sheet.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (b): Scales
Representative fraction is defined as the ratio of the length of an element of the object in the drawing to the corresponding actual length of the corresponding element of the object.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (b): Scales
The proportion by which all the dimensions of an object are either enlarged (or) reduced suitably for the convenience and clear representation to be shown on a drawing sheet is known as `drawing to scale' (or) simply 'scale'.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (b): Scales
The main objective of preparing an engineering drawing is to represent an object with correct shape and size.
Engineering Graphics
Subject and UNIT: Engineering Graphics: Unit I (a): Geometrical Construction
1. A line AB has a length of 131 mm. Divide it graphically into 8 equal parts.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (a): Geometrical Construction
Any plane figure bounded by more than four straight lines is called a polygon.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (a): Geometrical Construction
Bisector is a line which divides a line into two equal parts ie., AO = OB = 1/2 × AB. Hence Bisector is passing through the mid point of the line.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (a): Geometrical Construction
Important technical terms used in simple geometrical construction are recalled in this section.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit I (a): Geometrical Construction
The construction of plane figures such as triangle, circle, polygon etc., is generally refered as geometrical constructions.