RADIO TRANSMITTER. Functions and operation of radio transmitter.
Block diagram of radio transmitter.
Stages of radio transmitter.
The teacher explains the functions and operation of radio transmitter, displays the chart of the block diagram of a radio transmitter, and uses the block diagram in the chart displayed, explains the functions of each stage of radio transmitter, and observe the chart, and listen to the teacher’s explanation on the functions of each stage of radio transmitter.
RADIO RECEIVER. Functions and operations of radio receiver.
Types of radio receiver; CRF, super heterodyne, and FM receivers.
The teacher explains the basic functions and operations of radio receiver, while the students take notes on the basic functions and operation of radio receiver.
RADIO RECEIVER. Block diagram of radio receiver, and functions of each stage.
Advantages and disadvantages of different types.
The teacher provides a chart showing the block diagram of a radio receiver and explains the function of each stage, while students draw the block diagram of a radio receiver from the chart, and take notes on the explanations of the functions.
SELECTIVITY AND SENSITIVITY Definition of selectivity and sensitivity.
Processes of tuning and selectivity in radio receiver.
The teacher defines selectivity and sensitivity. Uses a radio receiver to explain the concept, while students observe the performance of the radio receiver used to demonstrate sensitivity and selectivity.
The teacher explains the functions of tuner by operating a radio receiver, uses chart to explain the various types of resonance (series, parallel, and series/ parallel), and explains bandwidth and gives specific examples of frequency ranges, while students draw the sketches, explaining the types of resonance perform calculation involving frequency ranges to determine bandwidth.
SATELLITE COMMUNICATION SYSTEMS Elements of satellite communication systems.
Types of satellite systems.
The teacher defines and state types of satellite communication systems (passive and active).
Lists the elements of a satellite system; earth station, ground based satellite, and state their functions while students ask and answer questions relating to satellite communication.
SATELLITE COMMUNICATION SYSTEMS. Transmission and reception of satellite to television.
Antenna for satellite communication systems.
The teacher discusses and explains transmission and reception of satellite communication, demonstrates the installation of a satellite dish, and organizes and take students to visit a satellite TV and radio station. E.g AIT, NTA etc
ELECTRONIC REPAIRS Power supply units.
The teacher provides radio receiver set, and demonstrate the following;
Dismantles and reassemble the power supply unit.
While the students observe the teacher dismantle and reassemble the various unit in a radio set.
ELECTRONIC REPAIR IF amplifier circuit.
AF amplifier circuit.
The teacher dismantles RF, IF, AF, and detector stages, provides a car radio set, and demonstrates the installation, and carries out fault repairs on car radio set. While the students observe the teacher install a car radio, and carry out repair on a faulty car radio set.
FAULT FINDING AND REPAIRS IN RADIO RECEIVER Types of fault in radio.
Components responsible for faults.
The teacher lists fault finding techniques after checking the plug to maintain power supply, uses flow chart for signal injection and signal tracing. While the students observe the teacher’s demonstration on how to apply the techniques.
FAULT FINDING AND REPAIR IN RADIO RECEIVER. Remedies.
Alignments (IF and RF).
The teacher create faults in radio set for students to trace the fault, provides radio receiver for fault finding and repairs, and demonstrates alignments of RF and IF, using the necessary equipments, and tools for FM and AM radio receivers. While the students practice the fault finding techniques to trace the fault created by the teacher, and observe the teacher demonstrate on the procedure of alignment of IF and RF stages using the necessary equipments and tools.
AUTO MECHANIC WORK
SS 2 FIRST TERM
PETROL ENGINE – TWO STROKE CYCLE
Teacher defines and explains two stroke cycle operation. Students examine the working sequence.
Teacher explain and illustrate four stroke cycle engine. Students observe the working operation of four strokes.
Resources; Live engine, charts, posters.
PETROL ENGINE – ADVANTAGES OF FOUR STROKE AND TWO STROKE
Teacher distinguish between two stroke and four stroke cycle engine. Students observe the differences between two stroke and four stroke engine.
Resources; Charts, posters on spark ignition engine (SIE)
DIESEL ENGINE—TWO STROKE CYCLE AND FOUR STROKE CYCLE.
Teacher explain and illustrate the principles of operation of two & four stroke cycle engines, emphasize on the difference between the two. Students observe the operational sequence of tow stroke & four stroke cycle. Distinguish between the layout and advantages.
Resources; Live engine of compression ignition engine (CIE). Two and four stroke.
COMPONENTS OF A TRANSMISSION UNIT (CLUTCH) – IDENTIFICATION OF PARTS AND CHARACTERISTICS OF CLUTCHES.
Teacher illustrate with sketches, types of transmission components, i.e pressure plate, disc, release bearing.
Students make sketches on types of clutches. Observe the operation. Resources; Gearbox, posters, charts.
COMPONENTS OF A TRANSMISSION UNIT (CLUTCH) CONSTRUCTION AND OPERATION OF A SINGLE PLATE CLUTCH.
Teacher list various parts in a transmission system. Students identify transmission components.
Resources; Live vehicle, clutch , gearbox, posters, charts.
COMPONENTS OF A TRANSMISSION UNIT (GEAR BOX)—OPERATION OF A SLIDING MESH GEARBOX AND REVERSE MECHANISM.
Teacher dismantle and identify parts of gearbox, illustrate and explain. Students observe the operation, and the dismantling.
Resources; Live vehicle, gearbox, posters, charts, etc
SUSPENSION SYSTEM—LEAF SPRING AND COIL SPRING
Teacher assist in tracing faulty system. Students identify faulty suspension.
Teacher explain the effect of faulty system. Students note the effects of faulty steering system. Resources; Real objects, steering, gear box e.g whom & wheel.
STEERING SYSTEMS—ADJUSTMENT OF STEERING UNIT
Teacher demonstrate how to remove and replace steering unit. Demonstrate the adjustment of the steering unit. Students observe the removal of steering unit, observe and participate in adjustment of steering unit. Resources; Posters, charts, spanner, hammers, screw drivers.