TECHNICAL DRAWING
SSII THIRD TERM
WEEK
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TOPIC/CONTENT
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ACTIVITY
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1
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PLANES AND VIEWS IN SPACE:-
Key terms in planes and views in space.
Line inclined to horizontal and vertical plane.
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Explains terms used in plane in space
-vertical plane (VT)
Horizontal plane(ht)
Angle of inclination:-
Draw true length and true angle of a line inclined to horizontal and vertical planes:-
Models projector, drawing instruments and materials.
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2
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ORTHOGRAPHIC PROJECTION:-
Definition principles and types of orthographic projections.
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Define, explain and describe the principle of orthographic projection:-
Participate actively in class discussion:-
Models, charts.
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3
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ORTHOGRAPHIC PROJECTIONS:-
Orthographic views (first and third angles).
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-demonstrate how to draw and dimension orthographic views:-
Observe and draw orthographic views from given pictorial views:-
Drawing instrument and materials.
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4
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Orthographic projection:-
Conversion of given orthographic views to isometric vies.
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Demonstrate how to draw isometric view from any given orthographic view:-
Observe and draw isometric view from given orthographic view:-
Drawing instruments.
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5
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BUILDING DESIGN AND WORKING DRAWING:-
Building design process.
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Explains building design process:-
Participation in building design process: - building plan sketches.
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6
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BUILDING DESIGN AND WORKING DRAWING:-
Prevention of working drawings showing
a)building plans
b)elevations
c) electrical & plumbing symbols
d) Dimensions.
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Guide the students to design building to meet given specifications:-
Design building to meet given specifications:-
Models and posters.
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7
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BUILDING DESIGN AND WORKING DRAWINGS:-
Types of building to be design.
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Guide students in the preparation of working drawings showing building plans, elevations dimensions electrical and plumbing symbols of different of building types:-
Prepare building plans from sketches of different building types:-
Models and posters.
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8
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DETAILS OF PARTS OF BUILDINGS:-
Identification of parts of building.
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Guide students to identify parts of a building:-
Identify parts of a building:-
Posters.
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9
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DETAILS OF PART OF BUILDINGS:-
Detail building drawing :
(foundations, floors, walls opening and lintels).
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Guide students to draw details of a building with dimension:-
Draw the details of a building and indicate members and dimensions:-
Charts.
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10
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DETAILS OF PARTS OF BUILDINGS:-
Roof types and roof members: pitch roof, cable roof, hipped roof etc, rafters wall plates king post purloins etc.
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Guide students to draw, identify roof types
Guide students to draw roof members:-
Identify roof types, and draw roof members:-
Diagrams.
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11
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Revision
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Revision
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12
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Examination
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Examination
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13
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Examination
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Examination
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SENIOR SECONDARY TECHNOLOGY
METAL WORK
SS 2 FIRST TERM
WEEK
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TOPIC AND CONTENT
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ACTIVITIES
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1
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Metal joining processes,
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Explanation of temporary metal joining process
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Permanent metal joining process
2 identification of common fastener and their uses:
-boit
-Nuts
-pris and scrers etc.
-Riveting
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The teacher
Defines the temporary and permanent methods of joining metals together.
-Cut mild steel plate and drill through the two pieces and use boit and nut to assemble them.
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2
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Permanent metal joining process
Soldering:- Hard and soft soldering.
Tools and equipment.
Soldering:-
(I)Soft soldering
(II) Hard soldering
(III)Soldering Tools And Equipment.
(IV)soldering operations
(V)Flux.
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Students
Should demonstrate riveting operation soldering is explained to be the permanent method of joining metals together with solder.
The solder meits at the temperature lower than the filler metals.
They explain on how soldering iron is used with flux for soldering operations.
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3
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Brazing,
Definition of brazing
(I) Dip
(ii)Furnace (iii) Inflamed Resistance (vi) Torch.
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The students cut a thin mild steel plate (10x 10 x 1)mm. 2piecs and use SQ brass rod to lab them together using furnace or oxy- acetylene flame. For brazing.
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4
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Torch brazing,
Materials, tools and equipment
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Demonstrate the brazing operation by using sheet of metals in the workshop oxy-acetylene flame to joint the pieces of metals (operant metals together)
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5
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Introduction to welding,
-Importance of welding basics
-welding groups and processes
-method of applying welding .
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Define welding as the permanent methods of joining two or more metals together.
State the important of welding in the society.
Students should group the welding into semi automatics and automatics.
ARC welding- students should prepare their work piece prio to welding .
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6
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Gas welding
C oxyacetylene welding (OAW) principle.,
Oxy-acetylene welding system
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Low pressure system.
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(2)High pressure system
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Explains the principle of gas welding system.
State the difference between high pressure and low pressure acetylene welding system.
Demonstrate on how gas welding operation in carried out in the workshop.
State about 10 safely preventions that must be observed in the workshop when using low pressure and high pressure acetylene system.
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7
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Oxy-acetylene welding equipment.
-cylinders.
-Blowpipe
-Rubber lose.
-Regulators etc.
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Introduce students to oxy-acetylene welding equipment and explain the hazards involves in the operation
-Explains the function of pressure regulating ganged and the function of the blowpipe.
-Explains the flash back arrestor is attach to the hose to present flash back.
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8
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OXY- acetylene
Welding flame.
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Natural flame oxidizing flame
Carbonizing flame
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Back fire and flash back
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Welding method
(i)leftward welding
(ii)Right word welding
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Define the three type of flame to student and state their uses.
Student should then use spark higher to rekindle the flame and adjust the flame to the three types of flame .
The teacher ask the students to cut the base metal prepare the edge and demonstrate the welding operation with the filler rod and the role in progressing to work left.
-Right ward welding the operation progresses toward right.
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9
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Joints:
A Butt, lap, tee joint etc.
B Defect in oxy-acetylene welds
-Definition of defects.
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The teacher
interacts students to cut base metals
for the practical purpose. And form the following
joint,
Butt, Lap, Tee joint.
The teacher mentions different defect in welding
joints and defined them. E.g. blow hole , cupping,
cracking of the weld.
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10
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Temporary joining process,
-Mechanical fasteners
-Definition of screw thread
-screw thread terms
-Principal ports of an external screw thread
-Uses of screw thread
How screw thread are produced.
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Hand tools
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Power machine tools
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Describe screw thread as mechanical fasteners,
Present mild steel rood to student in the metals
work shop and cut it to a defined dimension, fixe it
in the chuck of a lathe machine and thread it for
students to see.
The teacher them instruct the students to perform
the same operation on the lathe.
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Students should define screw thread terms
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e.g. numeral character,. Pitch etc
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-state the differences between hand and machine tool with the stated example. Hammer, mallet, screw driurs as hand tools.
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Machine tools are powered
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11
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Form of screw thread, square thread
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Electricity e.g. power lack saw, drilling machines
etc.
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12
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Form of screw thread, SQUARE THREAD ACME, thread Buttress thread
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Use chart to demonstrate the screw thread form.
Mention and sketch some screw thread and state
where they should be used.
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13
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Revision
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Revision
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14
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Examination
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Examination
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METAL WORK
SS 2 SECOND TERM
WEEK
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TOPIC AND CONTENT
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ACTIVITIES
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1
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arc welding,
Definition of arc welding.
Basic types of arc welding.
(i)Non consumable electrode arc welding.
(ii) Consumable electrode arc welding.
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The teacher
Defines arc welding and write down the principle involved in establishing the arc.
Mention basic types of arc welding and give students work pieces of a given dimension with an electrode to weld a butt joint.
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2
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Consumable electrode arc overcalling,
Definition of arc welding
-maintenance of the arc.
-metal transfer across the arc.
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The teacher
Defines arc welding. students scratch the electrodes on the parent metal with draw it to a height arc length (1.5m) and maintains it at that length through out the weld.
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3
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Shielded metal arc welding (swam),
-principle of operation
-SMAW equipment
(I) D.c transformer.
(ii)Electrode holder
(iii)Flexible cable electrode.
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Explain the principle of operation of (SMAW)
Show the SMAW equipment to students and ask them to put them into use in the workshop
-Using electrode connected to the electrode holder.
-connect the electrode holder to the feasible able which leads directly into the transformer. The D.C.
State the source of supply of the AC
-Explain how rectifier reduces the AC connect to the welding connect.
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4
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Striking the arc,
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Taping method
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Scratching method.
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In order to establish an:-There are two methods which involves touching the electrode with the base metal and with drawing it to a length for the arc to be established scratching motion involves scratched the electrode on the parent metal in the motion the marches is being scratched.
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5
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Electrodes,
Function of electrode coating
Classification of electrode
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State that the flux coating prevents the weld from at mospheric contamination and for protective should on the weld.
Classify electrodes according to welding conditions.
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6
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Essential factors for maintaining high quality weld.
-Connect electrode type
-connect electrode size
-connect current
-connect arc length
-connect travel speed
-connect electrode angle
-connect manipulation of spatter.
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In maintaining high quality weld student must select connect size of electrode to suit connect .maintaining the speed of the weld and angle inclination of the electrode.
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7
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Arc welding position ,
Arc welding joint ,
Over-head welding
Vertical welding
Horizontal welding.
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Explain the welding position and state the factors that governs the process
-place mild steel plate of specified size for student to weld in horizontal position, overhead position and overhead position
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8
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Riverts,
-types and use
-sheet metal work
-Hard work
-machine work.
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Teacher mentions the various types of rivet and state their uses and where they are important
State the advantage of rivet joints students should produce various rivet and drill mild steel plate to have a round hole the hammer them together to have a rivet joint by loud. Use also machine to loud machine rivet.
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9
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Basic sheet metal work hand tools and equipments.
Sheet metal work operation:-
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Cutting tools:-
Hand shares (snips)
Bench shares
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Bench tools: stakes, Bick, iron, Hammer, Mattets etc.
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Machine for sheet metal work
Gillotine, Bending Rollers, universal jenny folding machine
-Bending
-Flanging
-wiring
(B)
Sheet metal work joints.
-Grooved seam, paned down know up, ship on joint and ship in joint
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Demonstrate the cutting of sheet metals using guillotine, use bending rollers to bend the sheet metal. Ask students to use universal jenny folding machine folding student should use hammer and mallets to beat the folded metals to shape for finishing.
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10
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Pattern development
(A)method of pattern development radial line, triangulation parallel line
(B)types of pattern:-rectangular, plain, cylindrical, conical section.etc.
-cylindrical calendaring
-internal gridding and surface grinding.
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Cut their sheet of mild steel plate and flanch the edge bend, the edges for safety and use wire for rounding up the bottom. And mallet it down. to shape (wired edge)
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Work out the bending allowance for the know up joints, bend the metal to the shape required and use ships to cut the excess metal away for tarnishing.
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Explain method of pattern development state types of patterns used for plain, cylindrical and conical sections etc.
-Develop simple patterns of shape using parallel lines radial and triangulation method and transfer it to the work piece.
Demonstrate the grinding operation using the grinding disk for both internal and external surface.
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11
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Revision
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Revision
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12
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Examination
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Examination
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