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Scales and Geometrical Constructions in Technical Drawing, Schemes and Mind Maps of Engineering Drawing and Graphics

University of Engineering and Technology Peshawar (UETP)Engineering Drawing and Graphics

A basic introduction to scales in technical drawing, covering concepts like reducing and enlarging scales, representative fractions, and types of scales. It also delves into diagonal scales, both decimal and fraction-based, used for precise measurements. The document concludes with a practical example of a geometrical construction problem, demonstrating the application of scales in technical drawing.

Typology: Schemes and Mind Maps

2022/2023

Available from 03/18/2025

mohaiman-khan 🇵🇰

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1. SCALES

a. Reducing Scales

•For objects drawn smaller than their actual size

b. Enlarging Scales

•For objects drawn larger than their actual size

SCALES

Discover Schemes and Mind Maps of Engineering Drawing and Graphics University of Engineering and Technology Peshawar (UETP)

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1. SCALES

a. Reducing Scales

(^) For objects drawn smaller than their actual size b. Enlarging Scales
(^) For objects drawn larger than their actual size

SCALES

2. Representative Fraction (R.F.) - (^) The ratio of the length of the drawing to the actual length of the object represented - (^) Represented in the form of X : Y - (^) X is the unit on the drawing whereas Y is the representation on the actual object. - (^) A scale of 1:2 means 1 unit of length on the drawing representing 2 units of length of the object. - A scale of 2:1 means 2 units of length on the drawing representing 1 unit of length of the object.

4. INCH DIVISIONS

a. Fractions ( th s)

4. INCH DIVISIONS

a. Fractions ( th s)

4. INCH DIVISIONS

a. Fractions ( th s)