MODULE-WEEK-2.pdf - Department of Education Region XII...

This preview shows page 1 - 3 out of 12 pages.

Department of Education Region XII Kidapawan City Division KIDAPAWAN CITY NATIONAL HIGH SCHOOL Roxas St., Kidapawan City LEARNING MODULE (W2) Page | 1 LEARNING MODULE 4 (WEEK 2) Measuring Tools Objective: At the end of this chapter students should be able to: Identify different measuring instruments to be selected and used according to the level of accuracy required. 4.1 Different Measuring Tools/instrument and their application Measuring tools are used for the purpose of measuring dimensions, implementing any work with precision. The measuring tools are also used largely for carrying out different types of measurements. 4.2 Importance of Measuring Tools Measuring tools are essential for examining a finished product or semi- finished product. The inspection or examination operations include checking, or testing an object based on the required dimensions given on a diagram or a sketch. Measurements taken must be accurate. 4.3 Different Measuring Tools 4.3.1. T-Square is used as guide in drawing horizontal lines and in measuring up to 48” straight line. 4.3.2. Triangles are used for drawing vertical and oblique lines. The most commonly used triangles are the 45 and the 30 x 60 . Illustrations below show the proper use of drawing lines and measuring angles using the T-square and triangle. 4.3.3. Ruler is the most popular type of measuring tool. It is usually 6 or 12 inches in length. It is needed for measuring sizes and distances. 4.3.4 Triangular Scale is used in general drawing. Its main purpose is to reproduce the dimension in full size or to reduce or enlarge them on a drawing. Scales help a drafter keep the proportions accurate. Steps in Using a Scale a. Place the edge of the scale parallel to the line being measured. b. Face the edge of the scale that you're reading toward your non dominant side (if it's oriented vertically) or away from you (if it's oriented horizontally). This helps keep you from casting shadows on the relevant face of the scale as you work. c. Make light marks to indicate the distance you're measuring or drawing out, as measured by the scale. d. Adjust dividers with the scale by making a pencil line as long as the dividers should be wide, using the scale as a guide. Then adjust the dividers by orienting the points on the ends of the pencil line. Adjusting the dividers by placing the points directly on the scale might nick the surface of the scale, making it hard to read.
Image of page 1