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Which of the following scale is a reducing scale

Which of the following scale is a reducing scale Correct Answer 1 ∶ 04

Representative Fraction (R.F.):

An R.F. scale is a ratio, or fraction, that expresses the mathematical relationship between MAP and LAND.

There are three types of scale:

1. Reducing scale

  • When the dimensions on the drawing are smaller than the actual dimensions of the object. It is represented by the scale and RF as 

    Scale: 1 cm = 100 cm or 1 : 100 and by RF = 1 / 100 (less than one)

2. Full scale

  • Sometimes the actual dimensions of the object will be adopted on the drawing then in that case it is represented by the scale and RF as

     Scale: 1 cm = 1 cm or 1 : 1 and by RF = 1 / 1 (equal to one).

3. Enlarging scale

  • In some cases, when the objects are very small like inside parts of a wrist watch, the dimensions adopted on the drawing will be bigger than the actual dimensions of the objects then in that case it is represented by scale and RF as

     Scale: 10 cm = 1 cm or 10 : 1 and by RF = 10 / 1 (greater than one)

Hence 1: 04 is reducing scale.

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