Lesson Notes By Weeks and Term - Junior Secondary School 1

SECOND TERM E-LEARNING NOTE

SUBJECT:  BASIC TECHNOLOGY                                     

CLASS:  JSS 1

REFERENCE MATERIALS 

1. MELRVE, Basic science and technology for JSS, Book 1
2. NERDC, Basic Technology for JSS, Book 1

WEEK THREE AND FOUR

TOPIC:  BOARD PRACTICES AND SCALE DRAWING

CONTENT

• Definition of board practice
• Setting up the board
• Drawing of lines
• Positioning of the title block

DEFINITION OF BOARD PRACTICE

Board practice is the act of learning how to use drawing instrument on drawing board to draw vertical, horizontal, incline lines etc., in order to display good board practice, it is necessary to use the appropriate drawing instruments which includes the following: 1. Drawing board 2. Tee-square 3. Set-square 4.Pair of compasses 5.Divider 6.Protractor 7. HB, 2H pencil 8. Eraser

SETTING UP THE BOARD

Step 1 Place the drawing board conveniently on the table with the square edge to the left-hand side.

Step 2 Place the drawing paper on the board, leaving equal space all round.

Step 3 Place the tee-square on the paper, and gently slide or move the tee-square to the top edge of the paper.

Step 4 Set the top edge of the paper parallel to the edge of the tee-square, with the stock of the tee-  square firmly against the edge of the drawing board on the left-hand side.

Step 5. Gently slide the tee-square down without moving the paper.

Step 6 Cut of pieces of adhesives tape to hold the paper in position, and place them over the four corners of the paper.

EVALUATION

1. Define board practice.
1. Mention the steps involved in setting up the board.

DRAWING OF LINES

All horizontal lines are drawn with the aid of tee-square, usually from left to right, and rotating the pencil as the line is drawn. This ensures uniform thickness of the line.

The set-square is used sitting on the tee-square to draw upright or vertical lines on the paper. Angled lines are also drawn with the set-square turned in different directions.

POSITIONING OF TITLE BLOCK

Title block is at the bottom right-hand corner of the drawing which consist of the following information (a) Title of Drawing (b) Name of object (c) School (d) Scale (e) Date

The title block should be lettered free-hand in single stroke capitals. The two types of lettering are vertical and inclined. Only one method of lettering should be used.

EVALUATION

1. How can horizontal and vertical line be drawn?
2. List the information required in title block.

READING ASSIGNMENT

Read on board practice from Introductory Technology JSS1 by Evans (pg13-17)

WEEKEND ASSIGNMENT

1. Title block is at the……...hand corner of the drawing (a) left (b) right (c) right-left (d) left-right
2. Drawing instrument used in board practice include the following except (a) Tee-square (b) Protractor (c) Set-square (d) 5H pencil
3. The types of lettering are (a) horizontal & vertical (b) vertical &vertical (c) vertical & incline (d) horizontal & incline
4. How many methods should be used while lettering (a) one (b) two (c) three (d) four
5. Horizontal lines should be drawn using (a) set-square (b) tee-square (c) free-hand (d) none of the above

THEORY

1. Define board practice.
2. List the information required in title block.