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TLE-ICT-CSSInformation and Communications Technology
Computer Systems ServicingQuarter 2 – Module 1:
Performing Mensuration and Calculation
(SUPPORT MATERIAL FOR INDEPENDENT LEARNING EN-GAGEMENT)
A Joint Project ofSCHOOLS DIVISION OF DIPOLOG CITY
and theDIPOLOG CITY GOVERNMENT
Computer Systems Servicing – Grade 9 Alternative Delivery Mode Quarter 2 – Module 3: Performing Mensuration and Calculation First Edition, 2020
Printed in the Philippines by ________________________
Department of Education – Region IX – Dipolog City Division
Office Address: Purok Farmers’,Olingan,Dipolog City ____________________________________________Telefax: ____________________________________________E-mail Address: ____________________________________________
Development Team of the Module
Writer: Marojelou A. Magbuhos
Editor: Marojelou A. Magbuhos
Reviewer: Lynne B. Gahisan
Management Team: Virgilio P. Batan Jr. - Schools Division Superintendent Lourma I. Poculan - Asst. Schools Division Superintendent Amelinda D. Montero - Chief, CID Nur N. Hussien - Chief, SGOD Ronillo S. Yarag - EPS PVR – LRMDS Leo Martinno O. Alejo - PDO II - LRMDS
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Introductory Message For the facilitator:
Welcome to the Grade-9 Computer Systems Servicing Alternative Delivery Mode (ADM) Module on Preparing and Interpreting Technical Drawing (PITD):Prepare/make changes to electrical/electronic schematics and drawings and Store technical drawings and equipment/instruments.
This module was collaboratively designed, developed and reviewed by educators both from public and private institutions to assist you, the teacher or facilitator in helping the learners meet the standards set by the K to 12 Curriculum while overcoming their personal, social, and economic constraints in schooling.
This learning resource hopes to engage the learners into guided and independent learning activities at their own pace and time. Furthermore, this also aims to help learners acquire the needed 21st century skills while taking into consideration their needs and circumstances.
In addition to the material in the main text, you will also see this box in the body of the module:
As a facilitator, you are expected to orient the learners on how to use this module. You also need to keep track of the learners' progress while allowing them to manage their own learning. Furthermore, you are expected to encourage and assist the learners as they do the tasks included in the module.
Notes to the Teacher This contains helpful tips or strategies that will help you in guiding the learners.
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For the learner:
Welcome to the Grade-9 Computer Systems Servicing Alternative Delivery Mode (ADM) Module on Preparing and Interpreting Technical Drawing (PITD): Prepare/make changes to electrical/electronic schematics and drawings and Store technical drawings and equipment/instruments.
This module was designed to provide you with fun and meaningful opportunities for guided and independent learning at your own pace and time. You will be enabled to process the contents of the learning resource while being an active learner.
This module has the following parts and corresponding icons:
What I Need to Know
This will give you an idea of the skills or competencies you are expected to learn in the module.
What I Know
This part includes an activity that aims to check what you already know about the lesson to take. If you get all the answers correct (100%), you may decide to skip this module.
What’s In
This is a brief drill or review to help you link the current lesson with the previous one.
What’s New
In this portion, the new lesson will be introduced to you in various ways; a story, a song, a poem, a problem opener, an activity or a situation.
What is It
This section provides a brief discussion of the lesson. This aims to help you discover and understand new concepts and skills.
What’s More
This comprises activities for independent practice to solidify your understanding and skills of the topic. You may check the answers to the exercises using the Answer Key at the end of the module.
What I Have Learned
This includes questions or blank sentence/paragraph to be filled in to process what you learned from the lesson.
What I Can Do
This section provides an activity which will help you transfer your new knowledge or skill into real life situations or concerns.
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Assessment
This is a task which aims to evaluate your level of mastery in achieving the learning competency.
Additional Activities
In this portion, another activity will be given to you to enrich your knowledge or skill of the lesson learned.
Answer Key
This contains answers to all activities in the module.
At the end of this module you will also find:
The following are some reminders in using this module:
1. Use the module with care. Do not put unnecessary mark/s on any part of the module. Use a separate sheet of paper in answering the exercises.
2. Don’t forget to answer What I Know before moving on to the other activities included in the module.
3. Read the instruction carefully before doing each task. 4. Observe honesty and integrity in doing the tasks and checking your
answers. 5. Finish the task at hand before proceeding to the next. 6. Return this module to your teacher/facilitator once you are through
with it.
If you encounter any difficulty in answering the tasks in this module, do not hesitate to consult your teacher or facilitator. Always bear in mind that you are not alone.
We hope that through this material, you will experience meaningful learning and gain deep understanding of the relevant competencies. You can do it!
References This is a list of all sources used in developing this module.
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This module covers the knowledge, skills, attitude, and values needed to prepare/interpret diagrams, engineering abbreviation and drawings, symbols and dimensions. The scope of this module permits it to be used in many different learning situations. The language used recognizes the diverse vocabulary level of students. The lessons are arranged to follow the standard sequence of the course. But the order in which you read them can be changed to correspond with the textbook you are now using.
This module is divided into two lessons, namely:
Prepare/make changes to electrical/electronic schematics and drawings
Store technical drawings and equipment/instruments
After going through this module, you are expected to:
Draw and identify correctly electrical/electronic schematic Identify correct drawing; select and use equipment in accordance with job
requirements Identify tasks to be undertaken for care and maintenance of drawings
according to company procedures Record technical drawings and prepare an inventory in accordance with
company procedures Identify task to be undertaken for proper storage of instruments according to
company procedures
What I Know
A. Direction: Answer the following questions. Write the letter of the best answer on your notebook. 1. If the greek letter Omega (Ω) appears in a schematic diagram, the component value being represented is a. A. Capacitor C. Transformer B. Transistor D. Resistor 2. The labels of a capacitor C1A and C1B in a diagram are examples of _______. A. Designated letters C. Subscript letters B. Suffix letters D. coefficient letter
What I Need to Know
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3. One of these is NOT given in a schematic diagram A. Wiring specification C. Actual appearance of components B. Point-to-point resistance values D. Operating instructions 4. The symbols on a schematic diagram are arranged so that the diagram can be “read” in this manner. A. Top to bottom C. Right to left B. Bottom to top D. Left to right 5. Line conventions is use in drawing electrical and electritonics diagrams. A. Line thickness C. Interrupted lines B. Thickness D. Line application B. TRUE OR FALSE. __________6. Drawing is the act and discipline of composing drafting that visually communicate how something functions or is constructed. __________7. Delegate a portion of your garage, shed or basement closet as a place to store tools. __________8. Maintaining cleaning equipment is important because if your tools are stored correctly, the bacteria you're trying to eliminate will grow right on or in them. __________9. Storing your tools properly makes them easy to find when needed and helps keep them from damage. __________10. Template used to draw ellipse.
Note: If you get 100% correct in this pre- assessment, skip the lesson but if not and only get 50% to 99% correct, then proceed with the lesson.
Lesson
1 PREPARE/MAKE CHANGES TO
ELECTRICAL/ELECTRONIC SCHEMATICS AND DRAWINGS
Electronic schematics are like recipes for electronics. They tell you what ingredients to use and how to mix the ingredients. But instead of using text to explain the recipe, a drawing is used.
What’s In
Ask: Why is it important to use an electrical symbol?
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What’s New
Direction: Unscramble the letters to form a word. Write your answers on your notebook.
1. LYSMBO -
2. ARWGIND -
3. GIESDATNNOI -
4. POOSTMNECN -
5. SEULAV -
What is It
One of the features of a quality electronic diagram is its appearance with simplicity in design and easy-to-understand layout. To achieve this, you have to follow the following standards in laying out electronic diagrams.
Rules for Drawing Symbols.
Recommended practices to be used in the application of symbols to a circuit diagramare listed below. 1. The position of a symbol on a diagram does not affect its meaning. 2. The weight of a line used in drawing a symbol does not affect its meaning. In some cases, a heavier line may be used to emphasize a particular symbol. 3. A given symbol may be drawn in any size that is suitable for use in any particular diagram. However, when a symbol is enlarged or reduced in size, it should be drawn in proportion to the rest of the drawing.
4. If necessary for contrast, some symbols may be drawn smaller or larger than other symbols on a diagram. However, for simplicity, it is recommended that not more than two different sizes of symbols be used on any one diagram. 5. In general, a connecting line should be brought to a symbol either vertically or horizontally, but a connecting line brought to a symbol at an angle has no particular significance unless otherwise noted. 6. The arrowhead of a symbol may be open ( ) or closed ( ) unless otherwise noted. 7. The standard symbol for terminal (o) may be added to any symbol. But when this is done, the terminal symbol should not be considered a part of the symbol itself.
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Reference Designations The symbols used to represent various components on a circuit diagram are most often accompanied by a combination of letters that identify the components but are not themselves a part of the symbol (Table 3-1). Table 3-1. Reference Designations of Electronic Components
Components Class Designation Letter(s) Capacitor C
Diode D Resistor R Switch S or SW
Transformer T Transistor Q or TR
When more than one symbol of a specific type of component appears on a diagram, the letter (or letters) is followed by numbers that identify the components. These combinations of letters and numbers are referred to as reference designations (Fig. 3-1).
Fig. 3-1. Recommended methods of indicating reference designations and component values. Numerical Values of Components When details of the type, rating; or value of a particular component are to be given on a diagram, this information is placed adjacent to the symbol or is given by means of notes accompanying the diagram. For example, resistance and capacitance values are indicated as shown in Fig. 1-3. In this scheme, the symbol Ω for ohms and the abbreviations μF and pF for capacitance values are usually omitted and are instead replaced by notes such as the following: 1. All resistors expressed in ohms unless otherwise indicated. 2. All capacitors expressed in microfarads unless otherwise indicated.
A resistance value of 1,000 ohms or more is most often expressed in terms of Kilohm (K) or Meghm (M) units. Thus a resistance of 4,700 ohms is written as 4.7K, while a resistance of 270,000 ohms may be written as 270K or as 0.27M. The comma used when writing a 4-digit number such as 4,700 is not used when such a number is given on a diagram.
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Capacitance values of 1 through 9,999 picofarads are usually expressed in picofarad units. Capacitance values greater than 10,000 picofarads should be expressed in microfarad units. Suffix Letters Suffix letters are used to identify separate parts of a unit upon a diagram when such components appear as a single, enclosed unit as shown in Fig. 3-2. C1A and C1B are the suffix letters used in the diagram.
Fig. 3-2. Two capacitors are enclosed in one unit.
Layout The layout or form of a diagram should show the main features prominently. The parts of a diagram should be carefully spaced to provide an even balance between blank spaces and lines. Enough blank space should be left in the areas near symbols to avoid crowding any necessary notes or reference information (Fig. 3-3).
Fig. 3-3. Example Schematic diagram of a power supply circuit.
Part Value Description
T1 220V (or 110V) to 12V Transformer
DB1
Diode Bridge Rectifier
C1 470 µF (20V and upwards) Capacitor
C2 1 µF (10V and upwards) Capacitor
U1 7805 Voltage Regulator
What is Line Thickness? The standard line conventions used in the preparation of these diagrams are shown in Table 3-2. Table 3-2. Line thickness
Line application Line thickness
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For general use Medium Mechanical connection, shielding, and future circuits line
Medium
Bracket-connecting dash line Medium Brackets and leader lines Thin Boundary of mechanical grouping Thin For emphasis Thick
Connecting Lines Lines connecting symbols and other parts on a diagram should, whenever possible, be drawn either horizontally or vertically. As a general rule, no more than three lines should be drawn to any point on a circuit diagram (Fig. 3-4A). This procedure reduces the possibility of line crowding that could make the interpretation of a diagram more difficult than necessary.
RECOMMENDED AVOID IF POSSIBLE (A) (B)
Fig. 3-4. Connecting lines. (A) recommended and undesirable methods of drawing lines to a point upon a diagram, (B) two “groups” of connecting lines drawn parallel to each other. When connecting lines are drawn parallel to each other, the space between them should be at least 1/16 inch when the diagram is reduced to a final size. Interrupted Lines Connecting lines whether single or in groups, may be interrupted when a diagram does not provide for a continuation of these lines to their final destination. When a single line is interrupted, the line identification can also indicate the destination (Fig. 3-5A). When groups of lines are interrupted, the destination of the lines is usually given in conjunction with brackets (Fig. 3-5B). In all cases, the lines should be located as close as possible to the point of interruption.
(A) (B) Fig. 3-5. Methods of identifying the destination of single and grouped connecting lines. Dashed Lines
output
TO LEFT
AND RIGHT CHANNELS
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Dashed lines (----------) are used on schematic and other types of diagrams to show a mechanical linkage between components or parts of components. ELECTRONIC SCHEMATIC SYMBOL To be able to read schematics you must know the schematic symbols. Here is an overview of the most used symbols in circuit diagrams.
Electronic Components Schematic Symbols Uses/Application
Battery
A large and a small line is suppose to represent one battery cell so that the image below would suggest a two-cell battery of 3 V. But usually people just draw the battery symbol with one or two cells no matter what voltage it is.
Capacitor
European Style
US Style
Capacitors are either polarized or not. The symbols that are used for the two are shown below. Both in European and US style. Is a device that stores electrical energy in an electric field.
Resistor
The schematic symbol of the resistor are drawn in two different ways. The american style resistor is drawn as a zigzag resistor while the european style resistor is drawn as a rectangular resistor. Is a passive two-terminal electrical component that implements electrical resistance as a circuit element.
Variable resistor
(Potentiometer)
The variable resistor or potentiometer is drawn in several different ways. The symbol is often drawn as a resistor with an arrow across it or pointing down on it as the one beside.
Diode Standard
Diode
Zener Diode
Light Emitting Diode
The diode family has several different symbols because there are several different types of diodes. Beside is a standard diode, a zener diode and a Light Emitting Diode (LED).
Transistor
Bipolar Junction Transistor
Field Effect Transistor
The most common transistor types are the Bipolar Junction Transistor (BJT) and the Field Effect Transistor (FET).
Inductor
The inductor symbol looks like a coiled wire as this is what an inductor essentially is.
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Operational Amplifier
The operational amplifier or “Opamp” is represented as a triangle with two inputs and one output. In some cases, the power supply pins are also added. Beside, a version without power supply pins are shown.
Switch
A switch can be represented in numerous ways in electronic schematics.
Transformer (Trafo)
The symbol of the transformer looks like two inductors with something in between them.
Lesson
2 STORE TECHNICAL DRAWINGS AND EQUIPMENT/INTRUMENTS
Electronic schematics are like recipes for electronics. They tell you what ingredients to use and how to mix the ingredients. But instead of using text to explain the recipe, a drawing is used.
What’s In
A. Set
Show different kinds of drafting tools and materials
B. Perception
Ask:
What do you think is the function of these drafting tools and materials?
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What’s New
Direction: Write the word TRUE if the statement is correct and FALSE if the statement is wrong.
________1. Divider is an instrument for measuring, transferring, or marking off distances, consisting of two straight adjustable legs hinged together and ending in sharp points.
________2. Drafting tape can also be used in Technical Drawing to help in keeping the paper well positioned. Leaving no residue behind.
________3. Erasing shield is a thin plate (as of metal or celluloid) with holes usually of several sizes used to confine an erasure to a limited area.
________4. A pencil sharpener is a device for sharpening a pencil's writing point by shaving away its worn surface. Pencil sharpeners may be operated manually or by an electric motor.
________5. A drawing paper specially prepared for the use of drawers (such as draftsmen or sketchers).
What is It
Drafting is the act and discipline of composing drawings that visually communicate how something functions or is constructed. Similar withdrawing / sketch, it has several things to be used. Drafting tools, materials, and equipment are the best friends of the architects. For our 5th Art Guide, we will tackle the different kinds of drafting materials and their proper maintenance. Well, some of them are commonly used and are familiar already.
Drafting Materials Without the drafting tools, materials, and equipment, it will take you a long time or it is very impossible to finish a work. The following are the basic tools and materials used in drafting.
NAME DRAFTING TOOLS/MATERIALS
DESCRIPTION
Drafting Table and Stand
It is a special table with a slanted surface that can be adjusted based on the desired angle. It is higher than an ordinary writing table because some drawings, like mechanical drawing, are usually done while the draftsman is standing.
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T-square
Guides in drawing parallel horizontal lines.
Triangle
Draws perfect 90, 60, 45, and 30 degree angles.
Adjustable Triangle
Used to draw angles from 0 to 90 degrees
Triangular Scale
This guides horizontal, vertical and diagonal lines.
Compass
Draws large arcs and circles in pencil or pen point.
Divider
Used to equally divide a line or space by trial and error.
Protractor
It is a semi-circular tool used to measure or layout angle/arc.
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French Curve
It is used as a guide in drawing irregular curved lines.
Erasing Shield
Used to erase ink, pencil lines, and blots located in space.
Pencil Sharpener
As the name suggests, it sharpens pencils.
Sandpaper Pad
Makes pencil points conical and long without breaking.
Drawing Pencil
Consists of thick graphite used for writing and drawing. Hard – use for construction lines on technical drawing Medium – use for general use for technical drawing. The harder grades are for instrument drawings and the softer is for sketching Soft – use for technical sketching artwork but are too soft for instrument drawing
Drafting Paper
A thick paper specifically for drafting and sketching.
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Pencil Eraser
Used to remove unwanted lines and marks in drawing.
Drafting Tape
It secures the drawing paper on the table.
Drafting Brush
Brush eraser crumbs and debris from the drafting table
Circle Template
Template used to draw circles and arcs
Ellipse Template
Template used to draw ellipse
AMES Lettering Guide
Used to draw guidelines for lettering
Irregular Curve
Used to draw non-circular curves
HOW TO TAKE CARE OF DRAFTING TOOLS Drafting tools are often delicate and have many intricate and small pieces that need to be well maintained to continue working properly. Organizing and storing these items has a great deal to do with keeping them in pristine shape and
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working correctly. With a little patience and developing a routine, your tools will be well taken care of and working for a long time.
THINGS YOU WILL NEED:
1. Lay out all the drafting tools that you use and separate them into piles of like items. Place all pencils together, markers, erasers, rulers, stencils, paper and miscellaneous.
2. Using the cleaner, spray the cloth and wipe down supplies that have residue on them. Pencils, markers, stencils and rulers often retain oils on them from fingers.
3. Take the erasers and rub out any black marks. Do this by rubbing the eraser against a clean piece of paper until the black smudge has disappeared. For kneaded erasers, these can simply be stretched and remodelled into a ball, similar to bread dough, to get the black smudge marks out.
4. Run your hands through your drafting brush to remove any loose debris. Then, wipe it down with the cleaning cloth to remove any residue from the handle.
5. Roll up your drafting papers into a tight roll. Secure them with a rubber band at each end. Place the roll into a drafting tube for storage.
6. Place the pens and markers into the long slots of the organizer tray. Place the erasers in the smaller cube slots. Fill in with any other drafting materials, such as lead refills, push pins, paper clips, small rulers and mounting stickers.
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7. Take your compass and wipe it off with the cleaning cloth. If it is going to be stored in the organizer tray, wind the compass down until it is straight (versus at an angle, making a triangle shape). If it has its own case, then wind it to the size the case has set for it to be stored, and place it into the box.
8. Make a folder to hold all your stencils. Create holding flaps in an ascending order so the stencils can be layered and easy to see and access when needed. To make these flaps, simply use card stock paper and cut it into 3- or 4-inch sections. Glue each section onto a large main piece of card stock, starting towards the top for the smallest stencil and working your way down to the bottom. Glue three of the four edges, leaving the top edge open for the stencil to slide into.
9. Place this newly made stencil holder into a large plastic or mesh pouch. Put a dry cleaning cloth in the pouch, placed over the stencils, to help keep them clean.
10. Place the drafting brush and rulers into the pouch. Then place the organizer tray into the pouch. If the compass had its own storage box, then place this in the pouch. All the major tools should now be in this portable carrying pouch with your paper in the separate portable carrying drafting tube.
TIP
If you work in the same place every day, arrange your organizer trays on shelves or put stackable trays near your work table.
What’s More
A. MULTIPLE CHOICE DIRECTION: Write the letter of the best answer on your notebook. ______ 1. A letter designation is written near or beside a symbol to indicate what type of component that symbol is. The letter designation for transistor is _______. A. Q C. S B. R D. T ______ 2. These types of lines are used to show mechanical linkages between components or parts of components on schematic diagram. A. Connecting lines C. Medium lines B. Dashed lines D. Thin lines ______ 3. This punctuation mark is used to show the destination of grouped interrupted lines in a diagram. A. Bracket C. Open and close quotations B. Comma D. Question mark _______4. It is a special table with a slanted surface that can be adjusted based on the desired angle.
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I have learned that ____________________________________________________.
I have realized that ___________________________________________________.
I will apply ___________________________________________________________.
A. Drafting table and stand C. Long table B. Writing table D. Mechanical table _______5. Used to equally divide a line or space by trial and error. A. Compass C. Protractor B. Divider D. Erasing shield
What I Have Learned
Think back on something that you have learned from this Learner’s Material. Reflect on the following questions stated inside the box.
What I Can Do
Directions: Create a flipbook of drafting materials/tools/equipment. You may use the old magazines, pictures/print out that complete your work. If pictures are not available draw as many as you can and give the function of each. Be creative! (sample only) Scoring Rubrics:
CATEGORY 21-25 16-20 11-15 0-10 YOUR SCORE
1. Information All information is correct Most information is correct
Somewhat information is correct.
Information is incorrect.
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1. Content-Accuracy
The flip book is well -organized. It contains all of the information required: title, functions and illustration.
The flip book is mostly organized. It contains most of the information required: title, functions and illustration.
The flip book is somewhat organized. It contains some of the information required: title, functions and illustration.
The flip book is not organized. It contains few of the information required: title, functions and illustration.
2. Graphics/ Pictures
Illustrations go well with the text and are nicely drawn
Illustrations go well with the text and most are drawn neatly.
Illustrations go well with the text and some are drawn neatly.
Illustrations don't go well with the text and are not drawn neatly, or may be missing.
4. Independent Work
Student was able to work independently and ask for help as needed.
Student was able to work mostly independent and asked for help as needed.
Student was able to work somewhat independently and asked for help as needed.
Student was not able to work independently and asked for help as needed.
Total of 100 Points Interpretation of Scores 96-100 Excellent 86-95 Very Good 76-85 Good 51-75 Fair 50 and below Poor
Assessment
A. Direction: Answer the following questions. Write the letter of the best answer on your notebook. 1. If the greek letter Omega (Ω) appears in a schematic diagram, the component value being represented is a. A. Resistor C. Transformer B. Transistor D. Capacitor 2. The labels of a capacitor C1A and C1B in a diagram are examples of _______. A. Designated letters C. Subscript letters B. Suffix letters D. coefficient letter 3. One of these is NOT given in a schematic diagram A. Actual appearance of components C. Wiring specification B. Point-to-point resistance values D. Operating instructions 4. The symbols on a schematic diagram are arranged so that the diagram can be “read” in this manner. A. Top to bottom C. Left to right B. Bottom to top D. Right to left 5. Line conventions is use in drawing electrical and electritonics diagrams. A. Line thickness C. Interrupted lines B. Thickness D. Line application
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B. TRUE OR FALSE. __________6. Drawing is the act and discipline of composing drafting that visually communicate how something functions or is constructed. __________7. Delegate a portion of your garage, shed or basement closet as a place to store tools. __________8. Maintaining cleaning equipment is important because if your tools are stored correctly, the bacteria you're trying to eliminate will grow right on or in them. __________9. Storing your tools improperly makes them easy to find when needed and helps keep them from damage. __________10. Template used to draw ellipse.
Additional Activity A. Direction: Draw at least three (3)schematic symbols of the following electronic components and give each function (s).
Electronic Components Schematic Symbols Uses/Application
1.
2.
3.
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Answer Key
Assessment
A.
1. A 2. B 3. C 4. D 5. D B. 1. FALSE 2. TRUE 3. FALSE 4. FALSE 5. TRUE
LESSON 1 What’s New 1. Symbol 2. Drawing 3. Designation 4. Components 5. Values LESSON 2 What’s New 1. True 2. True 3. True 4. True 5. True
WHAT’S More 1. D 2. B 3. A 4. A 5. A What I Know 1. D 2. B 3. A 4. C 5. D 6. FALSE 7. TRUE 8. FALSE 9. TRUE 10. TRUE
References
Alashka, Europez. “Computer System Servicing NC II”. kupdf.net (2017). Ipinanumbalik June 19, 2020, mula sa/kay https://kupdf.net/download/computer-system-servicing ncii_59107eb3dc0d60e933959e80_pdf
Dahl, Oyvind Nydal “Electronic Schematic Symbols”. build-electronic-circuits.com (2012). Ipinanumbalik June 15, 2020, mula sa/kay https://www.build-electronic-circuits.com/schematic-symbols/
Industrial-electronics.com (n.d.). Ipinanumbalik June 15, 2020, mula sa/kay http://www.industrial-electronics.com/eed5th_7.html
https://www.buildelectroniccircuits.com/electronicschematics/#:~:text=Electronic%20schematics%20are%20like%20recipes,are%20aso%20called%20circuit%20diagrams.
Alashka, Europez. “Computer System Servicing NC II”. kupdf.net (2017). Ipinanumbalik June 19, 2020, mula sa/kay https://kupdf.net/download/computer-system-servicing-ncii_59107eb3dc0d60e933959e80_pdf
Haynes, Sarah. “How to Take Care of Drafting Tools”. homesteady.com (2020). Ipinanumbalik
June 15, 2020, mula sa/kay https://homesteady.com/12170358/how-to-take-care-of-drafting-tools
https://imgaws.ehowcdn.com/877x500p/s3.amazonaws.com/cme_public_images/www_eh
ow_com/i.ehow.com/images/a04/m8/24/care-drafting-tools-800x800.jpg leefrancesemery. “Proper Care of Drafting Instruments”. philnews.ph (2009). Ipinanumbalik
June 15, 2020, mula sa/kay https://hubpages.com/art/Proper-Care-of-Drafting-Instruments
Millis, Ned. “What Tools Are Used for Technical Drawings?”. careertrend.com. (2019).
Ipinanumbalik June 19, 2020, mula sa/kay https://careertrend.com/list-7388801-list-architect-tools.html
Valle Rey, Maestro. “What Are The Drawing Instruments And Their Uses”. philnews.ph.
(2019). Ipinanumbalik June 19, 2020, mula sa/kay https://philnews.ph/2019/10/09/what-are-the-drawing-instruments-and-their-uses/
www. steemit.com. (2018). Ipinanumbalik June 15, 2020, mula sa/kay
https://steemit.com/art/@steemph.cebu/drafting-materials-and-their-proper-maintenance-or-steemph-cebu-s-5th-art-guide
www. quizlet.comhttps://quizlet.com/347774747/drafting-materials-and-tools-its-usesfunctions-flash-cards/ https://www.buildelectroniccircuits.com/electronicschematics/#:~:text=Electronic%20schematics%20are%20like%20recipes,are%20aso%20called%20circuit%20diagrams. www.5.imimg.com. Ipinanumbalik August 14, 2020, mula sa/kay
https://5.imimg.com/data5/MV/EY/MY-10099192/flipbooks-500x500.jpg
https://www.build-electronic-circuits.com/power-supply-circuit/
For inquiries or feedback, please write or call: Department of Education – City Schools Division of Dipolog City, Zamboanga del Norte. Tel #: Fax No.: 065-212-6968Tel. No.: 065-212-5828Tel. No.: 065-212-2777
Email Address: [email protected]
