TLE 8 - TECHNICAL DRAFTING (PERFORM BASIC MENSURATION AND CALCULATION)
- 1. TECHNICAL DRAFTING 8 QUARTER 3 WEEK 4 PERFORM BASIC MENSURATIO N AND CALCULATION
- 2. LEARNING OUTCOME: LO 1. Select measuring instruments LO 2. Carry out mensuration and calculation
- 3. In your own personal opinion, what do you think is the importance of measuring tools?
- 5. used to draw circles, arcs, radii, and parts of many symbols used for dividing distances into a number of equal parts by the trial-and-error method. used for measuring and setting angles other than those obtainable with the triangles. COMPASS DIVIDER PROTRACTOR
- 6. T R I A N G L E S T-SQUARE RULER used for drawing vertical and oblique lines. The 45属 and the 30属 x 60属 are the most commonly used. used as a guide in drawing horizontal lines and in measuring up to 48 straight lines. is usually 6 or 12 inches in length. It is needed for measuring sizes and distances.
- 7. TRIANGULAR SCALE TAPE RULER a concave, spring-steel blade ranging from 1/4" to 1" wide and 6 to about 300 feet in length, coiled inside a carrying case main purpose is to reproduce the dimension in full size or to reduce or enlarge them on a drawing
- 17. EXAMPLE : If 10 mm = 1 cm Then 13 mm = __________ cm 13 mm x 10 mm 1 cm = 13 cm 10 = 1.3 cm If 1 in = 0.0254 m Then 2.5 in = __________ m
- 18. EXAMPLE : 2.5 in x 1 in 0.0254 m = 0.0635 m 1 = 0.0635 m If 1 in = 0.0254 m Then 2.5 in = __________ m