WAEC Syllabus for Auto Mechanics

Filed in West African Examinations Council by on February 6, 2016 0 Comments

Welcome to official WAEC Syllabus for Auto Mechanics.This syllabus is drawn purposely for examination, hence the topics are not necessarily arranged in the order in which they should be taught.

 

SCHEME OF EXAMINATION

There will be three papers, Papers1, 2 and 3 all of which must be taken. Papers 1 and 2 shall be a composite paper to be taken at one sitting.

 

PAPER 1:       will consist of forty multiple-choice objective questions all of which are to be answered in 1 hour for 40 marks.

 

PAPER 2:       will consist of five essay questions. Candidates will be required                               to answer any four questions in 1½ hours for 60 marks.

 

PAPER 3:       will consist of two practical tests both of which must                                                           be carried out by candidates in 2 hours for 100 marks.

For the practical test, schools will supply materials needed locally.

 

 

EXAMINATION SYLLABUS

 

 

S/NO. TOPIC THEORY PRACTICAL
1 WORKSHOP REGULATIONS

AND SAFETY

1.1        Instructions in basic safety rules relating to personnel, tools,  equipment and environment.

 

1.2        Types of fire extinguishers. Foam, dry powder, sand, water and wet-blanket types

1.1.1   Identification and use             of various safety             devices e.g. aprons,             goggles, shield, etc.

 

1.2.1   Demonstration/use              of fire extinguishers.

2 BASIC TOOLS, INSTRTUMENTS AND EQUIPMENT 2.1   Use of basic tools e.g.           hand tools and power

tools.

2.2   Use of measuring           instruments

 

2.3     Use of basic equipment           e.g. jacks, hoist, air-          compressors, etc.

2.1.1.   Identification and               use of basic tools.

 

2.2.1     Identification and               use of measuring               instruments.

2.3.1     Identification and use

of basic equipment.

3 LAYOUT OF A

MOTOR VEHICLE

3.1     Layout of a conventional           motor vehicle.

 

3.2.   Functions of the main

components.

3.3     Drive arrangements:

Front engine rear wheel             drive, rear engine rear           wheel drive, front engine           front wheel drive, four-          wheel drive.

3.1.1     Inspection of the

layout of a motor               vehicle.

3.2.1       Identification of the

main components.

3.3.1     Inspection of the drive               arrangements.

4 ENGINE

(a)   Main Components

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(b)   Principles of

operation.

 

(c)   Types of engine

 

 

 

 

 

 

(d)   Crank

arrangement

and firing order.

 

 

 

 

(e)   Valve-

operating

mechanism

4.1     Classification of engine

(petrol and diesel                       engine) and their main             parts.

 

4.2     Arrangement and           functions of the main           components: Cylinder           head  and cover; cylinder           block,

crankshaft, flywheel,                  connecting rod, piston           and rings, spark plug           (petrol) fuel injection            pump and injector            (diesel), valve, valve            springs, oil seal, cam-           shaft, push rod, rocker             shaft/arms.

 

4.3   Two stroke and four stroke         cycle petrol and diesel         engine.

 

4.4     Advantages and           disadvantages of petrol           and diesel engines.

 

4.5     Single and

multi-cylinder engines.

 

 

 

 

 

 

4.6     Crank arrangement and           firing orders: 2, 4 and 6           cylinder in-line engines.

V-4,V-6 and 4-cylinder           horizontally-opposed           engines.

 

4.7     Functions and operation           of valve operating           mechanisms.   Drives           layout, main           components, 4-cylinder

12 – and 16 – valve                engine. Valve                      timing including                      calculation of valve            opening and  closing            periods.

4.2.1     Identification of main              components.

 

 

 

4.2.2   Decarbonization of             cylinder head.

 

 

 

 

 

 

 

 

 

 

 

 

 

4.3.1     Identification of two

and four stroke engines.

 

 

 

 

 

 

4.5.1     Inspection and              classification of engines              according to cylinders.

4.5.2     Compression test.

4.5.3     Measurement of the                   bore and crank-               journals for wear.

 

4.6.1     Determination of

firing order through              valve opening.

4.6.2     Fault diagnosis.

 

 

 

4.7.1     Identification of main

components.

4.7.2     Valve adjustments.

4.7.3     Fault diagnosis.

5 FUEL SUPPLY SYSTEMS 5.1     Fuels and combustion:

elements of combustion;           air-fuel ratios; types and

properties of fuel-petrol           and diesel.

 

 

5.2     Petrol:   Layout and           operation of petrol supply           system-gravity and force-          feed systems:

simple carburetor,

multi-jet carburetor.

Air filters/cleaners.

Mechanical and electrical           fuel pumps. Advantages               and disadvantages.

 

5.3   Petrol-injection system:

Merits and demerits.

Electronic Fuel (Petrol)           injection (EFI).

 

 

 

 

5.4   Diesel:   Layout of a diesel

supply system:           elementary treatment of         injection pumps and         injectors.  Cold starting         devices.

5.1.1   Checking fuel

system troubles.

5.1.2   Inspection of exhaust             gases for normal air-fuel              ratios and excessively              worn engine.

 

5.2.1     Inspection layout of              petrol supply system:

dismantling,              examination and            reassembling of a            mechanical fuel pump.

 

5.2.2   Fault diagnosis.

 

 

 

5.2.3     Dismantling, inspection              and reassembling of a              carburetors.

5:3:1     Identify the main               components

 

 

 

5.4.1     Inspection of various              types of injection              pumps, servicing of              injectors and bleeding.

 

6 EXHAUST SYSTEM 61     Purpose and layout of           the system. Types of           silencers and manifolds.

 

 

 

6.1.1   Inspection of exhaust             system and             identification of the             exhaust and inlet             manifolds.

6.1.2   Checking the system for                 leakage.

7 LUBRICATION 7.1     Engine Lubrication:

Reasons for lubrication           and types: boundary           layer and film lubrication.

Lubricated parts and           components.

 

7.2     Types of feed-splash,           forced and petroil. (Wet           and dry).   Principle of          operation of  gear and          rotor oil pumps. Oil filters.

 

 

7.3     Lubricants: Applications           in engines, transmission,           steering, suspension           system and doors:                       Viscosity rating, SAE           numbers.

7.1.1   Identification of main             components.

7..2.1   Changing of oil and oil              filters.

 

 

7.2.2.   Servicing and testing of               pumps

 

 

7.2.3    Fault diagnosis

 

 

7.3.1.   Identification of different             types of lubricants.               Comparing fresh and              used oil. Use of grease              gun and oil can.

8 COOLING SYSTEM 8.1     Process of heat transfer.

 

8.2   Water Cooling System:

Purpose and layout of           the system: functions of          main components.                           Thermo-syphon and           pump assisted systems.

Elementary treatment of           pressurized cooling           system.

 

Thermostats: Purpose            and types. (bellows and            wax pellet).

 

8.3     Air Cooling System:

Layout and functions of           the system: main           components.               Comparison of the air           and water cooled           systems.

 

 

8.2.1   Identification of main              components, inspection              of radiator and its              construction,              replacement of fan belt              and hoses.

 

8.2.2     Flushing.

 

8.2.3     Fault diagnosis.

 

 

 

 

8.3.1     Fault diagnosis.

 

 

 

 

10 TRANSMISSION SYSTEM

(a)   Layout

 

 

 

 

 

 

(b)   Clutch

Assembly

 

 

 

 

 

 

 

 

 

 

 

 

(c)     Gearbox

 

 

 

 

 

 

 

 

 

 

(d)     Propeller shaft          and universal joint.

 

 

 

 

(e)   Rear Axle

 

 

 

9.1   Function and layout of

the transmission             system.

Types-manual and            automatic (excluding            twin axles and double            reduction axles) merits            and demerits.

 

9.2   Functions of a clutch.

Types and operating           principles of single plate           and multiplate.

Methods of actuation-          hydraulic and           mechanical. Simple           calculations.

9.3    Introduction to           automatic transmission.

Functions of torque           converter and fluid           flywheel.

 

9.4     Types, layout and            operating principles of            sliding-mesh, constant            mesh and synchromesh            gearboxes; main            components and their            functions. Gear selector            mechanism; simple            calculations of gear            ratios.

 

9.5   Functions and types of            the propeller shaft,            universal joint and            sliding joint.

 

 

9.6   Purpose of rear axle.            Arrangement and                       functions of main                       components: final drive,            differential unit, half –           shaft, oil seal and hub            bearings.

9.7     Methods of supporting              axle shafts. Advantages            and disadvantages

9.1.1     Identification of                different types of

layout.

 

 

 

 

 

 

9.2.1     Dismantling,

identifying parts and               re-assembling a clutch               unit (single plate).                 Adjusting clutch pedal               clearance and                              bleeding clutch unit.

9.2.2     Fault diagnosis.

 

 

 

 

 

 

9.4.1   Identification of              components of a              gearbox.

 

9.4.2   Inspection of gear teeth              for wear.

 

9.4.3   Fault diagnosis.

 

 

 

9.5.1   Examination of the              propeller shaft and              universal joint bearings              for bow and wear              respectively.

 

9.6.1   Identification of main               components.

 

9.6.2   Fault diagnosis.

 

9.7.1   Identifying main               components.

10 WHEELS AND TYRES 10.1     Types of wheel rims:              pressed steel, disc and              wire spoke wheels.              Hub attachments.

Wheel balancing.

Tyre sizes and              markings.

10.2     Tyres: tubed and             tubeless types:

Advantages and             disadvantages.

10.3     Wheel balancing, tyre                  sizes, markings.

10.1.1   Checking and              adjustment of wheel              bearing clearance,              removal and changing              of road wheels.

 

 

10.2.1   Tyre fitting and checking               tyre pressure.

10.2.2   Tube and tyre patching.

 

10.3.1   Wheel balancing.

 

11 BRAKING SYSTEM 11.1   Layout, functions and            operation of braking            system, drum and disc,            mechanical and            hydraulic. Brake lining            materials and methods            of attachment.

Importance of servo-           assisted brake.

Advantages and            disadvantage of disc            and drum brakes.

11.2   Brake fault.

11.1.1     Inspection of different               types of brakes.                 Replacement of pads               and shoes, bleeding               and adjustment.                “Spottesting” of brakes.

11.2.1   Fault diagnosis.

 

 

 

 

 

 

12 STEERING SYSTEM 12.1   General layout and            functions of the front            axle and steering            systems.

12.2   Steering geometry.

Ackerman linkage,            castor, camber, king pin            inclination, toe-in and            toe-out. Types of            steering gearboxes-rack            and pinion, recalculating            balls only.

12.3   Steering faults

12.1.1   Identification of main               components of different               layout.

 

12.2.1   Front wheel alignment,               inspection of tyre wear               patterns.

 

 

 

 

 

12.3.1   Fault diagnosis.

13 SUSPENSION SYSTEM 13.1   Purpose of the            suspension system,            layout and types, rigid            beam and independent.

Suspension (semi-           elliptic and coil springs);            advantages and            disadvantages, dampers            (shock absorbers.)

13.1.1     Identification of                differences between                 the rigid beam and                 independent                                 suspension.

 

13.1.2     Fault diagnosis.

14 ELECTRICAL SYSTEMS

(a)   Fundamentals

 

 

 

 

 

 

 

 

 

(b)   Auto Wiring system

 

 

 

 

 

 

 

(c)   Battery

 

 

 

 

 

 

(d)   Ignition System

 

 

 

 

 

 

 

 

(e)   Starting System

 

 

 

(f)     Charging System

 

 

 

 

 

 

 

(g)   Lighting System

 

 

 

 

 

(h)     Auxiliary Unit

14.1   Basic electrical terms             and symbols. A.C and             D.C sources, simple             circuits, Ohm’s law and             calculations involving             series and parallel             circuits. Basic             components and their               functions-relays,             resistors, lamps, fuses             and switches.

14.2     Wire gauges, colour              coding – reasons for              their use. Wiring              system – earth and              insulated returns: ways              of joining cables-             jointing, terminals,              connectors and                soldering.

14.3     Purpose, construction              and testing of lead-acid              battery. Electrolyte              composition. Battery              care and maintenance.

 

14.4     Layout of the coil              ignition system.               Function and operation             of the main             components.

Introduction to             computerized ignition             system.

 

14.5     Layout and functions of             the main components.               Types of starter motor.

 

14.6     Purpose and layout             (dynamo and             alternator).

Main components and             their operation.               Comparison of d.c and             a.c generators.

 

14.7     Layout of the system              main components and              their functions. Fuses              and bulbs-types and              ratings.

 

14.8   Layout and operations of            the auxiliary units.              Instrument panel, horn,            windscreen wiper.

 

14.9   Electrical faults.

14.1.1   Setting up simple                electrical circuits, use                of simple electrical               measuring                instruments.

 

 

 

 

 

 

14.2.1     Inspection and                identification of various                components. Simple                soldering and joining of                cables.

 

 

 

 

14.3.1     Examination and                testing of lead-acid                battery. Preparation of                electrolyte.

 

 

14.4.1     Identification of main                components; ignition                 timing, setting of                 contact breaker points                 and spark plug gaps.

 

 

 

 

14.5.1     Inspection and                 identification of main                 components.

 

14.6.1     identification of the                component parts.

 

 

 

 

 

 

14.7.1     Identification of main                 components,                 inspection and                 replacement of bulbs                 and fuses.

14.7.2     Head lamp focusing.

14.8.1   Inspection and testing               of main components.

 

 

 

14.9.1.   Fault diagnosis.

15 ELECTRONICS

(a)   Fundamentals of        Electronics.

 

 

 

 

 

 

 

 

(b)   Electronic Ignition

 

 

 

 

 

 

 

(c) Electronic Fuel       Injection

15.1   Explanation of the tem            Auto Electronics.

Identification of            electronic components:            diodes, transistors,            resistors, capacitors,            LED, transducers, coil            and motors.

Functions of            components. Symbols            in a circuit.

15.2   Operation of            transistorized ignition            system. Types of            transistorized and            electronic ignition            system: Inductive and            hall effect. Merits and            demerits.

15.3   Purpose and type of            systems (single-point            and multi-point            injections).

 

15.1     Identification of               components.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15.3.1 Identification of                        components in systems             (single-point and multi-             point).

16 AUTO AIR-CONDITIONING 16.1   Purpose, layout and            identification of major            components            (compressor,            condenser, evaporator            and dryer).  Principles of            operation.

 

16.1.1     Inspection and                 identification of air-                conditioning system                 and the components.

 

 

 

.

17 SAFE MOTORING 17.1     Main causes of             accident, essentials of             safe driving and             application of highway             code and safety             devices.

 

17.1.1     Identification of faults                and defective                components that could                cause accidents.

Identification and                interpretation of road                signs.

 

RECOMMENDED READING LIST

 

  1. Technology for Motor Mechanics Volumes 1 – 4 by S. C. Mudd (Edward Arnold

Publishers).

 

  1. Vehicle and Engine Technology by        Heinz Heister

 

  1. Motor Vehicle Technology and Practical Work by        J. A. Dolan

 

  1. Fundamentals of Motor Vehicle Technology by Hillier and Pittuck

(4th Edition)

 

  1. Automobile Engine and Vehicle Technology by Ian Chisholm

 

  1. Motor Vehicle Technology (Books I and II) by        R. W. Bent

 

  1. Motor Vehicle Mechanic’s Textbook by        E. K. Sulley

(New Edition)

  1. Highway Code

 

  1. Motor Vehicle Technology for Mechanics         by P. P. J Read and V. C. Reid.


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