Welcome great EduPodian, here is your Third Term JSS1 Basic Technology Scheme of Work and the excerpt of the Third Term JSS1 Basic Technology Lesson Note.
Scheme of Work:
1 REVISION
2 WOOD WORK HAND TOOLS-BORING TOOLS, CUTTING TOOLS
3 WOODWORK HANDTOOLS (CONTD.) –DRIVING AND IMPELLING TOOLS, HOLDING DEVICES, CARE AND MAINTENANCE.
4 METALWORK HANDTOOLS- MARKING OUT TOOLS,MEASURING TOOLS, HOLDING DEVICES
5 METAL WORK HAND TOOLS (CONTD.)-CUTTING TOOLS, DRIVING TOOLS
6 MAINTENANCE OF TOOLS AND MACHINES
7 BASIC ELECTRICITY- CURRENTS, ELECTRIC CIRCUIT.
8 BASIC ELECTRICITY (CONTD.)-MEASURING INSTRUMENTS, TRANSFORMERS, ELECTRICAL APPLIANCES AND ACCESSORIES.
9&10 BASIC ELECTRICITY (CONTD.)- SIMPLE ELECTRICAL CALCULATIONS
REFERENCE MATERIALS
• MELROSE, Basic Science and Technology Book 1
• NERDC, Basic Technology for JSS, Book 1
WEEK ONE
REVISION
1. ___ is a universal language used for communication among technical people (a) Scaling (b) Technical drawing (c) Sketching (d) Oblique.
2. Technical people include the following except (a) engineers (b) technicians (c) builders and draughtsman (d) lawyer
3. Which of the following is not a drawing instrument (a) set squares (b) French curve
(c) microscope (d) pencil
4. The following are the ways of caring for a tee square except (a) use it as a toy gun
(b) never use the tee square as a walking stick (c) do not use a pen knife or blade along the edge of the tee square (d) always hang your tee square after use.
5. Set squares are used to draw the following inclined angles except (a) 300 (b) 600 (c) 450
(d) 700
6. ___ is a universal language used for communication among technical people (a) Scaling (b) Technical drawing (c) Sketching (d) Oblique.
7. Technical people include the following except (a) engineers (b) technicians(c) builders
and draughtsman (d) lawyer
8. Which of the following is not a drawing instrument (a) set squares (b) French curve
(c) microscope (d) pencil
9. The following are the ways of caring for a tee square except (a) use it as a toy gun
(b) never use the tee square as a walking stick (c) do not use a pen knife or blade along the edge of the tee square (d) always hang your tee square after use.
10. Set squares are used to draw the following inclined angles except (a) 300 (b) 600 (c) 450 (d) 700
11. ______ is one of the quickest methods by which the shape of an object can be communicated to others.(a) Technical drawing (b) Freehand sketching (c) Scale drawing (d) Isometric drawing
12. _______ can be defined as the shortest distance between two points.(a) Straight line
(b) Curve (c) Circle (d) Square
13. Isometric view is at ____ to horizontal at both sides (a) 300 (b) 450 (c) 600 (d) 900
14. Oblique drawing is at ____ to the horizontal at one side (a) 300 (b) 450 (c) 600 (d) 900
15. The following are the advantages of free hand sketches except …… (a) A good sketch reduces the task of writing needed to describe the object on the mind of the designer.
(b) The ability to make freehand sketching is a valuable asset to practice Engineering work. (c) Laypersons can express themselves by freehand sketches. (d) Materials are wasted by freehand sketches
16. ____ can be defined as the accurate representation of objects in a determined proportion (a) Scale drawing (b) Freehand sketches (c) Technical drawing (d) Isometric drawing.
17. In _____ scale drawing, the object is drawn to the same size with the actual size. e.g. 1:1 (a) enlarged (b) reduced (c) full (d) proportioned
18. In ______ scale drawing the actual size of the object is reduced in proportion to the drawing .It is used when the object is too big , examples include 1:2, 1:5, 1:10, 1:50, 1:100 (a) enlarged (b) reduced (c) full (d) proportioned
19. In the scale expressed below 50 is the ____ of the object 50:1. (a) actual size
(b) drawing size (c) proportioned (d) regular
20. ____ scale drawing is used when the object to be drawn is too small to be clearly seen
(a) Enlarged (b) Reduced (c) Full (d) Proportioned
WEEK TWO
WOODWORK HAND TOOLS-BORING TOOLS, CUTTING TOOLS
CONTENT
BORING TOOLS
Boring tools are the tools used for making holes on wood. The major tzpes are
1. The brace
2. The bits
3. Gimlet
4. Bradawl
1. THE BRACE: This is a tool used for holding and turning the drill bits or twist drill when drilling hole. There are two types of brace and they are plain brace and ratchet brace.
Parts of brace are the head, crank, chuck and ratchet.
The head: this is made of hard wood and shaped to fit the hand of the user. It is screwed to a steel sleeve it fits over the the crank rod and runs on the hardened steel balls.
The crank: This is a rectangular bent metal rod, it fits into hardwood plastic handle. It moves in circular way called “the sweep of the brace”.
The chuck: the end of the crank is enlarged, threade and slotted to receive the socket and the jas respectively.
The ratchet: This is a mechanical device fitted to the brace so that holes can be braced in confined places such as close corners and enable the use of “Half the sweep” of the brace. A ratcet brace allows the bit to be rotated in one direction only.
2. BITS: A bit is a tool used in wood. Bits generally have a threaded centre point for drawing.
TYPES OF DRILL BITS
1. Twist drill
2. Twist bits or auger
3. Countersink bits
3. BRADAWL: This is used to make small holes in wood before using screws or nails. It can also be used to mark position of a hole before drilling.
4. GIMLET: This is used chiefly to make holes in wood before inserting small screws and nail.
EVALUATION
1. What are boring tools?
2. Mention three types of boring tools and state their uses.
CUTTING TOOLS
A saw is a tool for sawing or cutting wood into two or more parts. The teeth of saws are set alternately left and right to allow clearance.
TYPES OF SAW
We have various types saw based on their on specific operational usefulness.
These are:
1. RIP SAW
2. CROS-CUT SAW
3. PANEL SAW
4. BACK SAW
5. TENON SAW
6. DOVETAIL SAW
7. COPING SAW
8. FRET SAW
RIP SAW
The is used for sawing along the grain of wood .It has 4-5 points per 25mm and it is 610-710mm long
CROSS-CUT SAW
This is used for cutting wood across the grain .It is similar to the rip saw in appearance but it is only 460mm-10mm long. It has 6-9point per 25mm.
CROSS-CUT SAW
This is used for cutting wood across the grain .It is similar to the rip saw in appearance but it is only 460mm-10mm long. It has 6-9point per 25mm.
PANEL SAW
This is a saw that is capable of doing the work of both the rip saw and the cross-cut saw. It is
an all-purpose saw>It is 460-550mm.
BACK SAW
This saw is called backsaw because it has a steel or brass beck.
These includes
1. Tenon saw
2. Dovetail saw
TENON SAW
The tenon saw is used for cutting tenon, joints and other small jobs on the bench. It has a folded steel or brass back pressed to the blade. This gives it stiffness and weight when cutting. The saw 12 –14 points per 25mm and a length 200-350mm
DOVETAIL SAW
The saw is used for dovetailing and other small jobs on the bench. It is a smaller version of the tenon saw, but has an open handle. The length is 200- 260 mm. It has 20 points per 250mm.
COPING SAW
This is used for cutting accurate curves in thin wood and plywood. The blade can be adjusted to cut in any direction. The blade is about 150 mm long and has about 14 points per 25mm.
FRET SAW
It is used for complex shapes and curves in plywood and veneers. The blade of this saw is finer than the coping saw blade .It has a high frame, which allows it to be used over a wide area.
EVALUATION QUESTIONS
1. What is a saw?
2. State 7 types of saws
3. Describe the following saw and the uses (a) fret saw (b) panel saw
PLANES
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