WAEC syllabus 82/waec-radio-and-tv-syllabus
WAEC Radio and Tv Syllabus

1.                                              PREAMBLE  

                This examination syllabus evolved from the Senior Secondary School curriculum for Trade Subjects. It is intended to give candidates insight into the world of Radio, Television and Electronics Works; improve their attitude towards the maintenance and repairs of radio, television and electronic equipment and enable them to appreciate the relationship between science and technology.

    2.         OBJECTIVE  

                The objective of the syllabus is to test the candidates’ knowledge and understanding of the following:

    (i)         Workshop Safety Rules and Regulations;

    (ii)        Basic Electricity;

    (iii)       Electronic Tools and Instruments;

    (iv)       Electronic Devices and Circuits;

    (v)        Electronic Communication Systems;

    (vi)       Workshop Practice and Maintenance;

    (vii)      Entrepreneurship in Radio, Television and Electronics Works.

    3.         EXAMINATION SCHEME  

                This will be three papers, Papers 1, 2 and 3, all of which are to be taken. Papers 1 and 2 shall be composite paper to be taken at one sitting.

                             PAPERS 1: Will consist of forty multiple choice questions, all of which are to be answered in 45 minutes for 40 marks.

    PAPER 2: Will consist of six short-structured questions. Candidates will be required to answer any four of them in 1 hour for 60 marks.

    PAPER 3 Will be a practical test of 2 hour duration. It will consist of three skill-based questions out of which candidates will answer two for 90 marks.

    A list of materials for the test shall be made available to schools not less than two weeks before the taking of the paper for procurement and relevant preparations for the test to be made.

    Alternatively, the Council may consider testing candidates’ familiarity with the practical work prescribed in their syllabus in the event that the materials for the actual practical test cannot be acquired. For this test, two compulsory essay questions will be set. Candidates will be given 2 hours to answer them for 100 marks.

    Industrial Attachment:

    This should be done by the candidates during the long vacation between their SS II and SS III course. It will be supervised and assessed by their subject teachers. It will carry 10 marks

    4.

    DETAILED SYLLABUS

     

     

     

    TOPIC

    NOTES

     

    1. Workshop Safety Rules and Regulations

     

     

    1.1

    Sources and Prevention of Hazards

    Concept of safety

     

     

     

    Sources of hazards

     

     

     

    Treatments should include electric shock, damp or

     

     

     

    wet floor, wrong handling of tools, improper

     

     

     

    workshop dressing, horse play in the workshop

     

    1.2

    Safety Checks in Servicing Radio Receiver

    Preparation of work areas

     

     

     

    Capacitor discharges

     

     

     

    Working on power lines and live circuits

     

     

     

    Handling of tools

     

    1.3

    Safety Precautions in Television Workshop

    Power supplies in T.V.

     

     

     

    Picture tube

     

     

     

    High voltage section

     

     

     

    Component rating

     

     

     

    Definition and structure of matter

     

    2. Basic Electricity

    Atomic structure

     

    2.1

    Structure of matter

    Qualitative treatment only - definition and uses

     

    2.2

    Conductors, insulators and semiconductors

    Definition, units and symbols of voltage, current

     

     

     

     

     

     

    and resistance

     

    2.3

    Current, voltage and resistance

    Laws of attraction and repulsion of charges

     

     

     

     

     

    Identification of components by name, type,

     

     

     

    graphical symbol, value and rating

     

     

     

    Treatments should include resistors, capacitors,

     

     

     

     

     

    2.4

    Electronic components

    inductors, diodes, transformers, transistors,

     

     

    integrated circuit etc

     

     

    Graphical symbols, types, values and ratings

     

     

    Colour code of resistors and capacitors

     

     

    Comparison between meter measured and colour

    2.5

    Resistors and Capacitors

    code values

     

     

    Testing of capacitors

     

     

    Concepts, definitions and calculations

    2.6

    Kirchhoff’s Current and Voltage Laws

    Types, graphical symbols and structure

     

     

    Treatments should include testing for diodes and

     

     

    transistor configuration (CC,CE and CB)

    2.7

    Diodes and Transistors

     

     

     

    Graphical symbol of a battery( primary cell and

     

     

    secondary cell) and types

     

     

    Testing of battery

    2.8

    Battery

    Treatments should include difference between wet

     

     

    and dry cells

     

     

    Definition

     

     

    Symbols and relationship between voltage, current

     

     

    and resistance.

    2.9

    Ohm’s law

    Resistors in series and parallel

     

     

    Definition, measurement and calculation

     

     

    Definitions, difference, uses and measurement of

    2.10 Electric power

    d.c. and a.c.

    2.11 Direct and Alternating Current

    Definition and calculation

     

     

    Treatments should include r.m.s., peak, and

     

     

    average values, frequency and period in an a.c.

    2.12 Alternating waveform

    waveform

     

     

    Types and uses

    3. Electronic Tools and Instruments

    Treatments should include screw drivers, diagonal

     

     

    cutters, soldering gun, soldering iron, lead sucker

    3.1

    Electronic hand tools

    or de- soldering tools, pocket knife, stripper and

     

     

    soldering wick

     

     

    Identification, uses and operation

     

     

    Treatments should include voltmeter, ammeter,

     

     

    ohmmeter, multi meter

    3.2

    Electronic measuring instruments

    Basic a.c. and d.c. circuit, measurements of

     

     

    voltage, current and resistance

     

     

    Ohmmeter for testing semiconductor devices

     

    Identification of faulty meter

     

    Identification, uses and operation

     

    Treatments should include oscilloscope, signal

     

    tracer, digital frequency counter, logic probe, TV

    3.3 Fault Finding Equipment

    analyzer

    Definition

    4. Electronics Devices and Circuits

     

     

    Definition and application

    4.1

    Meaning of Electronics and Electronic circuit

    Treatments should include types of emission e.g.

     

     

    Thermionic, photoelectric, field and secondary

    4.2

    Concept of emission and photoelectric devices

     

     

     

    Semiconductor theory and types

     

     

    Semiconductor diodes

     

     

    Treatment should include rectification, principles

    4.3

    Semiconductors devices

    of operation, characteristics and application

     

     

    Principle and operation, schematic diagram

     

     

    Rectification and types

     

     

    Filters

    4.4

    Power Supply Unit

    Construction of stabilized low d.c. power supply

     

     

    unit

     

     

    Operation, construction and uses of Class A, B, C

     

     

    and AB amplifiers

    4.5

    Amplifiers

    Quantitative treatments only

     

     

    Concept of feedback

    4.6

    Resistive, Inductive, Capacitive (RLC) circuits

    Differences between types and their advantages

     

     

    Effect of a positive feedback on amplifiers,

    4.7

    Feedback

    bandwidth, noise, gain and distortion

     

     

    Principle and types of oscillator

     

     

    Construction of a typical oscillator circuit

     

     

    Types of multivibrator

    4.8

    Oscillators and Multivibrators

    Treatments to include astable, bistable and

     

     

    monostable

     

    Definition and types

    5. Electronic Communication Systems

    Block diagram, operation and function of each

     

    stage

    5.1 Electronic Communication Systems

    Noise

     

    Definition and classification

     

    Propagation of radio waves

     

    Radio frequency band- VLF, LF, MF, HF, VHF,

    5.2 Electromagnetic spectrum

    UHF,SHF and EHF

     

    Application of frequency range in electronic

     

    communication – frequency spectrum to be

     

    intensified

     

    Definition, types and functions

     

    Treatments should include loudspeaker,

     

    microphone, video camera, video display

    5.3 Transducer

    unit(cathode ray tube(CRT),Liquid Crystal

     

    Display(LCD))

     

    Definition, principle of operation and types of

     

    modulation

     

    AM and FM waveforms and envelopes

    5.4 Modulation and demodulation

    Percentage of modulation – modulation index and

     

    modulation factor

     

    Meaning and function of carrier wave in radio

     

    communication.

     

    Definition and types of demodulation

     

    Function(s) and operation

     

    Block diagram and function of each stage

     

    Types of radio receivers – Tuned Radio

    5.5 Radio transmitter and receiver

    Receiver(TRF), super heterodyne receivers(FM and

     

    AM)

     

    Advantages and disadvantages of each

     

    Definition

     

    Concept and function of tuner in radio receiver

     

    Identification of tuner stage in radio receiver

    5.6 Selectivity and sensitivity

     

     

    Definition, types of resonance ( series and parallel)

     

    Concept of bandwidth and bandwidth ranges

     

    Calculation involving frequency ranges to

    5.7 Resonant circuit

    determine bandwidth

     

    Treatments should include derivation of the

     

    formula for resonant frequency

     

    Elements and types

     

    Transmission and reception

     

    Antenna

    5.8 Satellite Communication Systems

     

     

    Working principle

     

    Block diagram

     

    Stages

    5.9 Television Transmitter

     

     

    Principle of scanning

     

    Video signals

     

    Principle of FM detection

    5.10 Image and Sound Reproduction in TV receiver

     

     

    Concept of Television

     

    Function and operation

     

    Application of television system

    5.11 Monochrome Television Receiver

     

     

    Block diagram and function of each stage

     

    Processing of picture and sound signal

    5.12 Principles of operation of Colour Television

    Primary colours in television

    Receiver

    Colour television systems and standards – PAL,

     

    SECAM and NTSC

    5.13 Principle of Colour Signal, Transmission and

    Colour signal components

    Reception

     

     

    Techniques and precautions

    6. Workshop Practice and Maintenance

    Types of solder

     

    Types of flux – amber resin and NaCl solutions

    6.1 Soldering and Desoldering in Electronic

     

    Circuits

    Dismantling and reassembling of power supply unit

     

    in a radio set

     

    Dismantling and reassembling RF, IF detector

    6.2 Electronic Repairs

    Stages in a radio receiver set

     

    AF amplifier circuit

     

    Installation and maintenance of a car radio set

     

    Diagnose fault by using fault finding pieces of

     

    equipment and logical trouble shooting procedure

     

    Components responsible for faults

    6.3 Fault finding and repairs in radio receiver

    Remedies for the faults

     

    Alignment of RF and IF stages of a radio set using

     

    the necessary equipment and tools

     

    Use of multimeter

     

    Treatments should include measurement of the

     

    correct value of current, voltage and resistance

    6.4 Electronic Measuring Instruments

    in active and passive electronic components and

     

    circuits

     

    Procedure for TV repairs

     

    Use of service information manual and circuit

     

    diagram

    6.5 Diagnosis and Repair of Black and White TV

    Identification of symptoms and repair of faults

    Receiver

    Fault clearing instruments

     

    Symptoms of faults

     

    Fault clearing at each stage

     

    Static and dynamic colour convergence comparison

    6                  Diagnose and Repair of a Colour Television Receiver

    7.          Entrepreneurship in Radio, Television and Electronic Works  

    7.1             Business Management and Finance

    7.2             Customer Relations

    7.3             Business Opportunities in Radio, TV and Electronics works. Colour bar generator and signal testing

    Accounting practices Cost benefit analysis Purchasing method

    Business records(Accounting ledger, Repair order form, Inventory sheet)

    Sources of capital e.g. Banks and Credit Unions

    Daily appearance at work

    Customer psychology

    Working relations

    Telephone courtesy

    Business Opportunities in Radio and TV Work Satellite installation

    Electronic specialist Radio and TV consultant Radio and TV technician

    Sales and Service Craft man Antenna and TV installation work

    5.                      LIST OF FACILITIES AND MAJOR EQUIPMENT/MATERIALS REQUIRED

      (1)                           Screw drivers

      (2)              Diagonal cutters

      (3)              Soldering gun,iron and lead

      (4)              Desoldering tools

      (5)              Pocket knife

      (6)              Stripper

      (7)              Semiconductor diodes

      (8)              Digital and analog multimeters

      (9)              Loudspeaker, microphone

      (10)            Cathode Ray Tube/LCD

      (11)            Nose pliers

      (12)            Old electronics panel

      (13)            Resistors, capacitors, inductors, transistors

      (14)            Vero board/breadboard

      (15)            D.C. power supplies

      (16)            Transformers

      (17)            Radio and television sets

      (18)            Oscilloscope

      (19)            Signal generator

      (20)            Magnifying glass

      (21)            Pattern generator (TV)  

      WAEC Subjects
      Agricultural Science
      Biology
      Chemistry
      Christian Religious Knowlege
      Commerce
      Economics
      English
      Geography
      Government
      Literature
      Mathematics