thermodynamic parameters of refrigeration and air conditioning systems, engineering mathematics fundamentals and refrigeration science, including: arithmetic: rational and irrational numbers, surds International System of Units (SI) units and conversion using unity brackets laws of indices (base 10), scientific and engineering notation estimations, errors and approximations, and significant figures algebra: substitution +, -, x on simple polynomials and simple indices expanding brackets factorising quadratics, common factors and difference of two squares simplifying algebraic fractions transposition of engineering formulae solving one variable equations simple algebraic division geometry: Pythagoras Theorem angles: degrees, radians and parallel lines cut by a transverse triangles: sum of angles, and properties of equilateral and isosceles triangles congruent triangles similar triangles: ratio of corresponding sides sin, cos, tan: ratios of a right-angled triangle sine and cosine rules circles: circumference, arcs, chords, tangents and circle theorems area and perimeter mensuration on above figures coordinate geometry: 2-D plane; x-y axes and s-t axes graph of linear function, y = ax + b and functional notation, y = f(x) straight line given slope and one point or given two points linear equations: solving algebraically and geometrically solving two linear functions simultaneously, algebraically and geometrically line segment: length and mid-point engineering mechanics: mass/density weight forces specific gravity equilibrium momentum friction loss velocity and speed energy in all forms mechanical advantage efficiency pressure/stress molecular theory: changes of state sublimation expansion and contraction electron flow state of aggregation internal potential energy phase change diagrams thermodynamics: temperature scales conservation of energy specific heat sensible, latent and super heat properties of steam enthalpy heat energy/temperature relationship heat balance on a body heat transfer conductivity calorimetry peltier effect 1st and 2nd law of thermodynamics gas laws and liquids: pressure Boyles law Charles law volumetric relationship psychrometrics latent heat of vaporisation relative humidity air conditioning processes dynamic pressure loss velocity and static pressure bourdon tubes density and relative density Archimedes principle Bernoulli’s equation manometers absorption refrigeration centrifugal compression external work of a liquid pressure volume diagrams isothermal and adiabatic processes polytropic processes Dalton’s law of partial pressure vapour compression: pressure/enthalpy relationship entropy characteristics of evaporation and condensation compression and pressure drop phases co-efficient of performance theoretical/practical cycles characteristics of refrigerants theoretical power input pressure losses heat exchange effects of condensing condition changes sub-cooling and superheating relevant job safety assessments or risk mitigation processes relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures. |