LET'S REVIEW!!

By Alaine Solonia

TLE 8 | Mechanical Drafting

WEEK 4 -

MENSURATION AND CALCULATION

By Alaine Solonia

INTRODUCTION

An understanding of measurement is essential for all parts of manufacturing and production technology. Measurements must be uniform so that people have common understanding and application in the production and use of manufactured objects.

IMPORTANCE OF MEASURING TOOLS

• 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.

​DIFFERENT MEASURING TOOLS

• used as guide in drawing horizontal lines & in measuring up to 48" straight line

T-SQUARE​

• used for drawing vertical and oblique lines

TRIANGLES​

RULER

• help the drafters keep the proportion accurate

​​TRIANGULAR SCALES

​

• used for measuring and setting of angles other than those obtainable with the triangles

​​PROTRACTOR

• needed for measuring sizes and distances

• usually 6 or 12 inches ​in length

• comes in comparable widths and lengths up to 10 meters.

TAPE RULER​

• used to draw arcs, circles, and parts of many symbols

COMPASS​

• used for dividing distances ​into a number of equal parts (by trial-and-error method)

DIVIDER

" There is no cramming for a test of character. It always comes as a pop quiz." 

Direction: By using the correct measuring tools or instruments, draw the sample figures below. NOTE: You need to apply the measuring of lines.

LEARNING TASK 4.1

Provided with drawing sample, follow the given measurement.

Procedures:

1. Draw borderline 1 cm all sides, use pencil no.2

2. Draw title block. (refer to the sample for the measurement)

3. Title block is 2cm divided by 2.

4. Details in title block must be written in capital letter.

TLE 8 | Mechanical Drafting

LEARNING TASK 4.1

RUBRIC​

TLE 8 | Mechanical Drafting

LEARNING TASK 4.1 - RUBRIC

PROCEDURES: This is a group activity.

a. Group yourselves into four. Assign a leader for each group.

b. Each member will be assigned to explain the functions as well as the steps in using the measuring tools/instruments during the demonstration.

c. Each member will take a video while explaining and demonstrating.

• NOTE: You can use time-lapse for demonstration only.

d. A leader or any member of the group will compile the videos and send it via GDrive folder.

e. Performance will be evaluated individually and by group through a Demonstration Checklist/Rubric that will be discussed by the teacher.

PERFORMANCE TASK 3

GROUP ACTIVITY