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# ELECTRICAL ENGINEERING - wec-engg.co.za - Pty Ltd. SCIENCE N4 ... CHAPTER 8 OSCILLATORS...

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• ELECTRICAL ENGINEERINGIST TRIMESTER 2ND TRIMESTER 3RD TRIMESTER

MATHEMATICS N4

ENGINEERING SCIENCE N4

INDUSTRIAL ELECTRONICS N4

ELECTROTECHNICS N4

MECHANOTECHNICS N4

POWER MACHINES N5

INDUSTRIAL ELECTRONICS N5

MECHANOTECHNICS N5

ELECTROTECHNICS N5

POWER MACHINES N6

INDUSTRIAL ELECTRONICS N6

MECHANOTECHNICS N6

ELECTROTECHNICS N6

SUPERVISORY MANAGEMENT N4

4TH TRIMESTER 5TH TRIMESTER 6TH TRIMESTER

ENGINEERING DRAWING N3

SUPERVISORY MANAGEMENT N5

STRENGTH OF MATERIALS ANDSTRUCTURES N5

SUPERVISORY MANAGEMENT N6

CONTROL SYSTEMS N6

MATHEMATICS N4

MODULE THEME WEIGHTED VALUE1 EQUATIONS, MANIPULATION AND WORD PROBLEMS2 DETERMINANTS3 COMPLEX NUMBERS4 TRIGONOMETRY5 SKETCH GRAPHS6 LIMITS AND DIFFERENTIATION7 INTEGRATION

CHAPTER 1 EQUATIONS, MANIPULATION AND WORD PROBLEMS

Factorising the sum of and difference between two cubes- Common factors, Grouping, The difference between two squares, The quadratic trinomial, The sum of and difference between two cubes.

*AFTER COMPLETION OF THE 5TH TRIMESTER, THE STUDENT IS SUPPOSED TO UNDERGO A 24 MONTHS TRAINING PROGRAMME AT A GOVERNMENT- APPROVED INDUSTRY/MINE AND THEN WRITE THE GCC EXAMINATION WHICH WILL BE GUIDED BY THE COLLEGE.

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• CHAPTER 2 DETERMINANTS

The origin of determinants, The development of a second order determinant, The solution of two equations simultaneously using determinants.

CHAPTER 3 COMPLEX NUMBERS

Introduction, The natural numbers(N), Integers(whole numbers)(Z), Rational numbers(Q), Irrational numbers, Real numbers(R), Imaginary numbers, Graphical representation of imaginary numbers, Powers of i (or j), Multiplication of real numbers by imaginary numbers, Addition and subtraction of imaginary numbers, Division of imaginary numbers.

CHAPTER 4 TRIGONOMETRY

Exact values- General, Exact values in the first quadrant, Exact values in other quadrants, Another figure to help you remember signs, Solving easy trigonometric equations using exact values, Arc functions(inverse trigonometric function).

CHAPTER 5 SKETCH GRAPHS

Co-ordinates, The domain and range, Dependent and independent variables, Functions and relations, Function values, The inverse of functions and relations, Continuous and discontinuous functions or relations, Symmetry.

CHAPTER 6 LIMITS AND FIFFERENTIATION

Limits, A general concept of a limit, Theorems on limits, Limits of the form 0/0, Limits of the form /

CHAPTER 7 INTEGRATION

Introduction, Standard integrals, Summary of all the relevant standard integrals.

ENGINEERING SCIENCE N4

MODULE THEME WEIGHTED VALUE1 KINEMATICS2 ANGULAR MOTION3 DYNAMICS4 STATICS5 HYDRAULICS6 STRESS AND STRAIN7 HEAT

MODULE1 KINEMATICS

Motion concepts (Foreknowledge), Addition of vectors (Foreknowledge), Resultant of three or more vectors (Foreknowledge), Resultant velocity with external factors, Vectors (Movement) which is not rectangular, Relativity, Kinetics where acceleration takes place, Projectile movement.

MODULE2 ANGULAR MOTION

Angular displacement and angular velocity, Angular acceleration, Work done and power resulting from torque.

MODULE3 DYNAMICS

Forces in action, Force problems-on a vertical plane, Force problems-Involving frictional forces, Friction on an inclined surface, Work done and power, Energy.

• MODULE4 STATICS

Torque (Foreknowledge), Beams in equilibrium-Two fulcrums, Centroids of thin plates, Centroids of a flat but unsymmetrical figure, Centre of gravity of a fixed object, Shearing force diagrams with point loads as well as evenly distributed loads, Bending moment diagrams with point loads as well as evenly distributed loads.

MODULE5 HYDRAULICS

Fluids (Liquids and gases) (Foreknowledge), Work done to pump liquids (Foreknowledge), The hydraulic press, Hydraulic pumps and accumulators, The Hydraulic Accumulator.

MODULE6 STRESS AND STRAIN

Types of stress, Testing of materials and Youngs Modulus of Elasticity.

MODULE7 HEAT

Linear Expansion, Area Expansion, The expansion of gases.

INDUSTRIAL ELECTRONICS N4

MODULE THEME WEIGHTED VALUE1 NETWORK THEOREMS 102 ALTENATING CURRENT THEORY 103 SEMICONDUCTOR DIODES 84 POWER SUPPLIES 75 TRANSISTORS AND AMPLIFIERS 156 OPERATIONAL AMPLIFIERS 157 ELECTRONIC POWER CONTROL 158 TRANSDUCERS 109 ELECTRONIC TEST EQUIPMENT 10

UNIT 1 : NETWORK THEOREMS

Introduction, Kirchhoffs law, Superposition theorem, Voltage sources, Thevenins theorem, Maximum power theorem, Exercise 1.

UNIT 2: ALTENATING CURRENT THEORY

Introduction, Simple RLC calculations, Series Resonance, Parallel Resonance, Q-Factor of resonance circuits, Bandwidth, Complex numbers, Exercise 2.

UNIT 3 : SEMICONDUCTOR DIODES.

Introduction, The formation of N-type semicondustors, The formation of P-type semiconductors, PN junction diode, Biasing of the PN-junction diode, Zener Diode, Varactor diode, Tunnel Diode, Exercise 3.

UNIT 4 : POWER SUPPLIES.

Introduction, Transformers, Rectification, Filters, Comparison of different filters, Voltage regulation, Exercise 4.

• UNIT 5 : TRANSISTORS AND AMPLIFIERS.

Bipolar junction transistor, Field effect transistor, Unijunction transistor, Exercise 5.

UNIT6 : OPERATIONAL AMPLIFIERS.

Introduction, Charateristics of operational amplifiers, Operation of an operational amplifier, Applications, Exercise 6.

UNIT 7 : ELECTRONIC POWER CONTROL.

Introduction, SCR, DIAC, TRIAC, QUADRAC, LASCR, Open and closed loop systems, Exercise 7.

UNIT 8 : TRANSDUCERS.

Introduction, Selecting a transducer, Requirements for reliable operation, Types of transducers, Resistive transducers, Capacitive transducers, Inductive transducers, Photo-sensitive transducers, Exercise 8.

UNIT 9 : ELECTRONIC TEST EQUIPMENT.

Introduction, CRT, CRO < oscilloscope block diagram, Function generator, Waveforms and uses, Exercise 9.

ELECTROTECHNICS N4

MODULE THEME WEIGHTED VALUE1 PRINCIPLES OF ELECTRICITY 302 D.C MACHINES 203 ALTERNATING CURRENT 104 THE TRANSFORMER 105 A.C MACHINES 106 GENERATION AND SUPPLY OF A.C POWER 107 MEASURING INSTRUMENTS 10

CHAPTER 1 PRINCIPLES OF ELECTRICITY

The atom a movement of electrons in a conductor electromotive force resistance series parallel temperature rises in electrical machines temperature coefficient of resistance Kirchhoffs law magnetism attraction repulsion electromagnetism magnetic circuit domain theory of magnetism hysteresis - eddy current electromagnetic induction emf generated by moving conductor capacitors types

CHAPTER 2 D.C MACHINES

Construction generator and motor principles winding armature reaction D.C Generator operation of the starter

CHAPTER 3 ALTERNATING CURRENT

Generating current frequency and speed phasor effective of RMS value and mean or average value of an alternating quantity resistance and capacitance in A.C circuits analogy of inductance

CHAPTER 4 THE TRANSFORMER

Construction magnetic circuit winding cooling tanks buchholz protection principles of operation transformer on open circuit transformers on no load

• CHAPTER 5 A.C MACHINES

The induction motor construction rotating magnetic field principles of operation speed and slip single phase and split phase motor starting of single phase induction motors

CHAPTER 6 GENERATION AND SUPPLY OF A.C POWER

Supply system layout high voltage transmission typical A.C transmission system

CHAPTER 7 MEASURING INSTRUMENTS

Range extension shunt resistors multiplier measurement of resistance

MECHANOTECHNICS N4

MODULE THEME WEIGHTED VALUE1 WORKSHOP LAYOUT

2 BELT DRIVES

3 METAL CUTTING MACHINES

4 CORROSION

5 PRECISION MEASUREMENT OF MACHINE PARTS

6 BEARINGS

7 GEAR DRIVES

8 HYDRAULIC SYSTEMS

9 HYDRAULIC SYSTEMS 2

CHAPTER 1 WORKSHOP LAYOUT

Introduction, Symptoms of poor workshop layout, Advantages of good workshop layout, Principles of good layout, Important factors influencing the layout design, Types of production and main characteristics of each, Types of layouts and main characteristics of each, Special requirements for the placing of machines in the workshop, Layout procedures, phases in the design of a layout.

CHAPTER 2 BELT DRIVES

Introduction, calculation for belt drives.

CHAPTER 3 METAL CUTTING MACHINES

Introduction, Calculations for cutting machines.

CHAPTER 4 CORROSION

Introduction, Classification of corrosion, Different forms of corrosion, Corrosion tests, Metal protection processes, Surface preparation for painting, Painting processes.

CHAPTER 5 PRECISION MEASUREMENT OF MACHINE PARTS

Introduction, Measurement of tapers with balls and rollers, Measurement of tapers with a sine bar, Precision measurement of screw threads, Gear tooth calculations using the constant chord method.

CHAPTER 6 BEARINGS

• Introduction, Journal or plain bearings, Lubricants in general, Anti friction bearings.

CHAPTER 7 GEAR DRIVES

Introduction, Simple and compound gear trains, Epicyclic gear drives.

CHAPTER 8 HYDRAULIC SYSTEMS

Introduction, Bernoullis theorem, Flow of water through orifices.

CHAPTER 9 HYDRAULIC SYSTEMS 2

Introduction, Chezys formula, Darcys formula, Venturimeters.

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POWER MACHINES N5

MODULE THEME WEIGHTED VALUE1 THERMODYNAMIC OF GASES

2 HEATING GASES

3 ENTROPY

4 STEAM GENERATION

5 ENTHALPY AND THE FORMATION OF STEAM

6 VOLUME OF STE

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