The representative fraction is defined as the ratio of the dimension of an element of an object in the drawing to its actual linear dimension of the same element of the object itself. The value of R.F is always expressed in the form of x:y, in which both x and yare lengths converted into the same units. Hence RF has no decimal and it is unitless. R...

The complete designation of an engineering scale shall consist of the word “SCALE’ followed by the mention of its ratio, as follows: SCALE 1: 1 for full size; SCALE X :1 for enlargement scales; SCALE 1: X for reduction scales

The standard values of RF for scalesin engineering drawing as recommended by BIS are as follows. 1. Full Scales- 1:1 2. Reducing Scales – 1:2 , 1:5, 1:10 , 1:50, 1:100, 1:200, 1:1000, 1:2000, 1:5000 3. Enlarging Scales- 50:1 , 20:1, 10:1, 5:1, 2:1. The scales in engineering drawing have to be chosen for depends upon various factors like the size of...