When the drawing are drawn smaller than the actual size of object then scale is known as

In engineering, a scale is the ratio of the size of a drawing to the size of the actual object. For example, if the object is 50 cm long and the drawing is 5 cm long, the scale is 1:10.  Here are some types of scales used in engineering: Diagonal scale Used to read lengths with higher accuracy as it represents a unit into three different multiples in meters, centimeters, and millimeters. Comparative scale Consists of two scales of the same RF, but graduated to read different units. Used to compare distances expressed in different systems of units, such as kilometers and miles, or... Show more

In engineering, a scale is the ratio of the size of a drawing to the size of the actual object. For example, if the object is 50 cm long and the drawing is 5 cm long, the scale is 1:10. 

Here are some types of scales used in engineering:

Diagonal scale
Used to read lengths with higher accuracy as it represents a unit into three different multiples in meters, centimeters, and millimeters.

Comparative scale
Consists of two scales of the same RF, but graduated to read different units. Used to compare distances expressed in different systems of units, such as kilometers and miles, or centimeters and inches.

Plain scale
Used to measure certain units and their one-tenth value. For example, a scale in cm and mm is a plain scale. 

Some other types of scales include: Enlarging scale, Vernier scales, and Scale of chords. 
An engineer's scale ruler has six scale sizes: 1:10, 1:20, 1:30, 1:40, 1:50, and 1:60. 

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