Refrigeration AC
G3N tutors you through the full CTVET Refrigeration AC syllabus offline — from Safe Work Practice, Hand Tools, Equipment and Instruments in RAC, Introduction to Material Technology and more — with adaptive lessons, instant quizzes and exam-ready summaries.
Syllabus
What you’ll cover in Refrigeration AC.
The complete topic outline G3N teaches, mapped to the CTVET curriculum.
Form 1 (Grade 10)
13 topicsSafe Work Practice
- Demonstrate knowledge of short term hazard in RAC
- Describe hazards in working with heavy equipment
- State hazards associated with working with sharp object
- Describe hazards caused by working with ladder
- Describe hazard in working with electrical equipment
- Describe housekeeping practices
- Demonstrate knowledge of Emergency Procedures
- Explain purpose of emergency shut off
- Describe fire control systems
- Explain importance of emergency exit
- State emergency numbers
- Demonstrate knowledge of non-emergency injury reporting
- Explain non-emergency injury reporting
- State procedures for non-emergency injury reporting
- State items in a first aid box
- State first aid facilities used in non- emergency injury reporting
Hand Tools, Equipment and Instruments in RAC
- Demonstrate knowledge of Hand Tools
- State various hand tools used in RAC
- Explain uses of specialised tools
- Explain differences between power tools and specialised tools
- Explain care and maintenance of specialised tools
- Demonstrate knowledge of the uses of RAC Equipment
- State various equipment used in RAC
- Explain uses of Vacuum pump
- Explain uses of oxy-acetylene equipment.
- Explain effects of improper use of Vacuum pump
- Demonstrate knowledge of RAC instruments
- State various types of RAC instruments
- Explain functions of Electronic combustion analyser
- Explain functions of velocitmeter and air balancing meter
- Describe working principle of draft gauge and modular unit
- Demonstrate skills in the use of hand tools, instrument and equipment
- Perform cutting of copper tube
- Perform flaring of copper tube
- Perform measurement of electric al parameters
- Carry out measurement of air velocity
- Perform heat bonding of copper-to-copper tube
- Adhere to safety measures
Introduction to Material Technology
- Demonstrate knowledge of properties of materials
- Define physical property of a material
- Explain the physical properties of material
- Define mechanical property of a material
- Explain the mechanical properties of a material
- Define chemical properties of material
- Explain the chemical properties of a material
- Demonstrate knowledge of metals
- Differentiate between ferrous and non-ferrous metals
- State examples of ferrous and non-ferrous metals
- Define alloy
- State examples of alloys
- Demonstrate knowledge of non-metals
- Define polymers
- State the categories of polymers
- Explain ceramics
- State examples of non-metals used in RAC
Applied Electricity I
- Demonstrate knowledge of Basic electricity
- Describe the structure of the atom
- Explain how ions are formed
- Explain static electricity
- Explain the movement of electrons
- Explain characteristics of good and bad conductors
- Demonstrate knowledge of current electricity
- State the differences between alternating current and direct current
- State the instrument used for measuring electricity and their units
- Identify electrical symbols in an electrical circuit
- Explain differences between series and parallel circuits
- State Ohm’s law and the formula for determining electrical energy and power
- Perform basic circuit calculations
- Demonstrate knowledge of basic electromagnetism
- Explain temporal and permanent magnet
- Describe how magnetic field is generated around a wire
- State uses of magnetic field
- Explain how solenoid works
- Explain inductance of a coil
- Demonstrate knowledge of electric wire
- State factors which affect a conductivity of a wire
- Explain factors which determine the size of a cable
- Explain resistivity of a cable
- State appropriate cable size for RAC unit
- State effect of temperature on resistance of a cable
Force and Motion
- Demonstrate knowledge of velocity of an object
- Define speed
- Explain how to plot Distance/time graph
- Describe how to represent data on Speed/time graph
- Describe the Velocity of an object
- Perform calculations involving velocity and velocity time graph
- Demonstrate knowledge of acceleration
- Explain linear acceleration of an object
- Describe how to represent velocity of an object on a Velocity/time graph
- Describe motion of a free-falling object
- Describe motion in a circular path
- Perform calculation involving acceleration of an object
- Demonstrate knowledge of force
- Define force and state its unit
- Explain types of force
- State the factors that governs the size of a force
- Explain the effect of force on an object
- State Newton’s laws of motion
- Perform calculation involving acceleration of an object
Food Storage Fundamentals
- Demonstrate knowledge of food preservation
- Explain principles of food storage in refrigeration
- State causes of food spoilage
- State methods of preventing food spoilage
- State factors affecting food storage life
- Demonstrate knowledge of medium temperature food storage
- State methods of storing food
- Classify fresh food by storage requirement for medium temperature
- State storage properties for storing fresh food in medium temperature
- State s torage conditions for storing fresh meat in medium temperature
- State display condition for storing fresh meat in medium temperature condition
- Demonstrate knowledge of low temperature storage
- Explain methods of quick freezing in low temperature storage
- Explain methods of sharp freezing in low temperature storage
- Explain methods of Immersion freezing in low temperature storage
- Explain methods of contact freezing in low temperature storage
- State freezing and Storage temperatures of meats, fishes and vegetables
Trade Drawing I
- Demonstrate skills in the use of drawing instrument and dimensioning
- State instruments used in drawing
- State functions of drawing instruments
- State types of dimensions in drawing
- State types of lines used in drawing
- Interpret scales in drawing
- Draw the title block using a set of drawing instruments
- Demonstrate skills in trade drawing symbols
- Describe lettering and dimensioning in drawings
- Draw pipe fitting symbols
- Draw refrigeration components symbols
- Draw electrical components symbols
- Draw refrigeration accessories symbols
- Draw and dimension a V-Block
- Demonstrate skills in freehand sketching
- Sketch hand tool
- Sketch refrigeration equipment
- Sketch refrigeration accessories
- Sketch refrigeration instruments
- Sketch schematic wiring diagram of refrigeration circuit
Trade Drawing II
- Demonstrate skills in drawing projections
- Describe drawing projections
- Perform isometric drawing
- Draw orthographic projection
- Perform oblique drawing
- Demonstrate skills in sketching mechanical components in RAC
- Sketch and label the internal construction of gauge manifold
- Sketch a crankshaft
- Sketch a piston-valve assembly
- sketch a piston
- Demonstrate skills in sketching commercial Refrigeration cycle
- Sketch refrigeration cycle with pressure gauges connected
- Sketch and label the construction of TEV
- Sketch and label the construction of AEV
- sketch the oil separator in the space provided
- Demonstrate skills in Drawing Electrical Refrigeration Circuits
- Draw electrical circuits for Refrigerators
- Draw electrical circuits for Air-conditioners
- Draw electrical circuits for three phase air- conditioning wirings
Basic Electronics
- Demonstrate knowledge of semi-conductor materials
- Define semi-conductor
- State the materials used in semi-conductor
- Explain doping of semi-conductor material
- Differentiate between p-type and n-type semi-conductors are formed
- Demonstrate knowledge of Basic electronics components
- Explain how semi-conductor components are used in RAC
- Explain reverse biased and forward biased of a diode
- Explain how to check a diode for continuity
- Explain the function of a rectifier in an electrical circuit
- Differentiate between NPN transistor and PNP type transistor
- Describe the use of thermistor in RAC
- Demonstrate knowledge of application of electronic components in RAC
- Explain uses of rectifier in RAC
- Explain uses of LED in RAC
- Explain uses of transistor as a switching device in RAC
- Explain uses of rectifier in RAC
- State uses of photo-cells in RAC
Fundamental of Refrigeration
- Demonstrate knowledge of refrigeration
- State applications of refrigeration process
- Define refrigeration
- Explain the term ton of refrigeration
- Explain heat transfer process in refrigeration
- Explain temperature scales
- Perform temperature conversion calculation
- Demonstrate knowledge of basic refrigeration cycle
- Describe basic refrigeration cycle
- Describe the division of the refrigeration cycle
- Explain the relationship between temperature and pressure in refrigeration system
- Describe the p-h chart
- Demonstrate knowledge of Refrigeration system
- Explain o pen refrigeration system
- Explain closed refrigeration system
- Explain refrigeration processes
- Define coefficient of performance (COP)
Refrigeration Components
- Demonstrate skills in assembling and disassembling of compressors in RAC
- Describe compressor designs
- Describe types of compressors based on their drives
- Explain the application of compressors in RAC
- State the factors limiting compressors performance
- Perform assembling and disassembling of open drive compressor
- Adhere to safety practices
- Demonstrate knowledge of condensers
- Define condenser
- State the purpose of a condenser in RAC
- State the types of condensers
- State the applications of condensers
- Demonstrate skills in replacing of metering devices
- Explain metering devices
- State the purpose of metering devices
- State the types of metering devices
- State the application of metering devices
- Replace capillary tube/metering devices in RAC system
- Adhere to safety measures
- Demonstrate skills in evaporator replacement
- Define evaporators
- State the purpose of evaporator
- State the types of evaporators
- State the application of evaporator
- Replace an evaporator in RAC
- Adhere to safety measures
Refrigeration and Air-conditioning Accessories I
- Demonstrate skills in trouble-shooting and replacement of pressure accessories
- Explain the purpose of refrigeration temperature accessories
- Explain the application of temperature accessories
- State the location of temperature accessories
- Trouble shoot and service temperature accessories
- Adhere to safety measures
- Demonstrate skills in electrical accessories in RAC
- Explain the purpose of refrigeration electrical accessories
- Explain the application of electrical accessories
- State the location of electrical accessories
- Trouble shoot and service electrical accessories
- Adhere to safety measures
- Demonstrate skills in trouble shooting and replacement or servicing of temperature accessories
- Explain the purpose of refrigeration temperature accessories
- Explain the application of temperature accessories
- State the location of temperature accessories
- Trouble shoot and service temperature accessories
- Adhere to safety measures
- Demonstrate skills in replacing noise eliminating accessories in RAC
- Explain the purpose of refrigeration noise eliminating accessories
- Explain the application of noise eliminating accessories
- State the location of noise eliminating accessories
- Replace noise eliminating accessories
- Adhere to safety measures
Matter and Energy
- Demonstrate knowledge of matter and measurement
- Describe the nature of matter
- Explain states of matter
- Explain various combinations of matter
- State common factors which influence the solubility of a solid in a liquid
- Explain crystallization
- Explain fundamental and derived quantities
- Demonstrate knowledge of heat energy
- Define heat energy
- Explain types of heat energy
- Explain methods of temperature measurement
- Explain specific heat capacity
- Perform basic calculation of quantity of heat contain in a substance
- Demonstrate knowledge of the general gas law
- State Charles Law
- State Boyles law
- Explain gas processes
- State the general gas law equation
- Explain Dalton’s law of partial pressure
- Perform basic calculation using the general gas laws
- Demonstrate knowledge of energy, work and power
- Define energy
- Explain Energy sources
- Explain work, power and efficiency
- State the SI unit of work and power
- Perform basic calculation involving work, energy, power, efficiency
Form 2 (Grade 11)
11 topicsLubrication
- Demonstrate knowledge of lubrication methods
- Define lubrication
- State methods of lubrication
- Explain drip method of lubrication
- State the importance of lubrication
- Demonstrate knowledge of lubrication system and components
- State types of lubrication systems
- State types of components that uses lubrication
- State functions of the oil separator
- Explain importance of oil return piping
- Demonstrate knowledge of lubricants selection
- State types of min eral oil for compressor lubrication
- State properties of refrigeration compressor oil
- Explain properties of oil
- State sources of oil contamination
- State factors to be considered in selecting lubrication oil
Refrigerant Management
- Demonstrate knowledge of refrigerant
- Define refrigerant
- State requirements of refrigerant
- Explain the effect of refrigerant on the ozone
- Explain ozone depleting substances (ODS)
- Explain the purpose of refrigerant cylinder colour coding
- Explain refrigerant grouping
- Demonstrate knowledge of primary refrigerant
- Explain CFC refrigerant
- Describe HCFC refrigerant
- State examples of HCFC refrigerant
- Explain Azeotropic refrigerant
- State refrigerant chemical name and formula
- State refrigerant boiling points
- Demonstrate knowledge of secondary refrigerant
- Define secondary refrigerant
- State types of secondary refrigerant
- State applications of secondary refrigerant
- Distinguish between various types of brines
- Demonstrate skills in refrigerant management
- Define refrigerant management
- State equipment used in refrigerant management
- State types of refrigerant management
- Explain the operations of recovery and recycling machine
- Explain the operations of recycling machine
Single Phase Motors
- Demonstrate knowledge of basic electric motors
- Define electric motors
- Explain electric motor theory
- State parts of electric motor
- Explain differences between starting and running windings of a single phase motor
- State types of single phase motors
- Demonstrate knowledge of characteristics of single phase motor s
- Explain the starting characteristic of single phase motor
- Explain the running characteristic of single phase motor
- State the applications of single phase motor
- State the ratings of single phase motors
- Demonstrate knowledge of single phase motor operations
- Explain electromagnetic theory
- Explain operation of single phase motors
- Explain operations of starting relay motors
- Explain induction motors
- Demonstrate knowledge of motor protection
- Explain importance of motor protection
- State types of motor protection devices
- State types of relays used in single phase motors
- Explain operation of magnetic contactors
- Explain effects of ambient temperature on single phase motors
Electric Motor Starters
- Demonstrate knowledge of starting relays
- Define starting relay
- State the types of starting relays
- State the applications of starting relays
- State the factors to be considered in selecting starting relays
- Demonstrate knowledge of Current relays
- Define current relay
- State the applications of current relays
- State the range of current relays
- Explain operations of current relay
- Perform calculations involving current relay
- Demonstrate knowledge of a potential relay
- Define potential relay
- State the applications of potential relay
- State the range of potential relay
- Explain the operations of potential relay
- Demonstrate skills in testing and wiring of current and potential relays
- Perform functional test on a current relay
- Perform wiring of current relay
- Perform test on a potential relay
- Perform wiring of potential relay
- Adhere to safety measures
Oxy-acetylene Equipment
- Demonstrate knowledge of Oxy-acetylene equipment
- Describe the set-up of oxy-acetylene equipment
- Explain colour coding on oxy-acetylene cylinders
- Explain colour coding on oxy-acetylene hoses
- Distinguish between threads on oxy-acetylene gas cylinders
- Demonstrate knowledge of Oxy-acetylene components
- State components of oxy-acetylene equipment
- State uses of oxy-acetylene cylinders
- State use s of pressure gauges
- Explain uses of hoses
- Explain use of the torch
- Explain importance of safety valves
- Demonstrate skills in using oxy-acetylene equipment
- Indicate correct position for storing oxy-acetylene cylinders
- Explain ways of transporting oxy-acetylene cylinders
- State procedures for lightening and setting the torch
- Perform oxy-acetylene flame setting
- Adhere to safety measures
Refrigeration Materials
- Demonstrate knowledge of tubing materials used in refrigeration
- S tate refrigeration tubing materials
- State common sizes of copper tubes
- State common sizes of steel tubes
- State common sizes of aluminium tubes. .
- Demonstrate knowledge of insulating materials in refrigeration
- State types of insulating materials
- State classes of insulating materials
- State physical properties of insulating materials
- State the purpose of insulating material
- Demonstrate knowledge of drainage materials
- State types of drainage materials
- State the purpose of drain line in refrigeration
- State types of drain in refrigeration
- Explain the function of the oil return line
Tube Preparation and Joining
- Demonstrate skills in tube cutting, bending and reaming
- Perform cutting of copper tube
- Perform reaming operation on copper tube
- Perform manual copper tube bending
- Carry out laying of copper tube
- Adhere to safety measures
- Demonstrate skills of flaring and swaging of copper tube
- Perform swaging of copper tube
- Perform flaring of copper tube
- Perform cleaning of copper tube
- Adhere to safety measures
- Demonstrate skills in heat bonding of copper tube
- Explain heat bonding
- Describe types of heat bonding used in joining copper tubes
- Perform brazing of copper-to-copper bonding
- Perform copper to iron bonding
- Adhere to safety measures
Leak Detection and Control
- Demonstrate knowledge of basic refrigerant leak detection
- Explain leak detection in refrigeration
- State leak detection methods in RAC
- Explain the procedure for leak detection in evaporator
- Explain the procedure for leak detection in condenser
- Demonstrate knowledge of oil leak detection in RAC
- State causes of oil leakages in RAC
- Explain how to prevent oil leakages in RAC
- State importance of oil leak detection in RAC
- Explain effects of oil shortage in compressors
- Demonstrate skills in refrigerant leak detection
- Test for leaks on evaporator
- Test for leaks on condenser
- Test for leaks on expansion valve
- Adhere to safety measure
- Demonstrate skills in oil leak detection in RAC
- Perform oil leakage test using white paper
- Check for oil leakages in refrigeration components
- Observe leakage using colour dye
- Perform sealing on process lines
- Adhere to safety measures
Troubleshooting of RAC
- Demonstrate knowledge of basic troubleshooting of refrigerator
- Explain troubleshooting
- State ways of troubleshooting
- State possible faults in a refrigerator compressor
- State possible fault in a thermostat
- Demonstrate skills in trouble shooting of a refrigerator not running
- Perform continuity test on plug top and main switch
- Detect fault on compressor motor
- Detect fault on overload protector
- Check fault on relay
- Check electrical circuit continuity
- Adhere to safety measures
- Demonstrate skills in troubleshooting of refrigerator running but not cooling
- Check refrigerant leakage
- Check overloading
- Check refrigerant under charge
- Check door gasket
- Adhere to safety measures
Installation of Air-conditioners
- Demonstrate knowledge of air-condition installation
- Differentiate between window and split unit Air-conditioners
- State tools used in installing window and split unit air-conditioners
- State factors to be considered in selecting the correct size of window and split unit air conditioners
- State procedures used to install window and split unit air conditioners
- Demonstrate skills in window air-conditioner installation
- Perform marking out for window unit air-conditioner installation
- Perform installation of the window unit air-conditioner
- Perform wiring of the window unit air-conditioner
- Adhere to safety measures
- Demonstrate skills in split unit air-conditioner installation
- Perform marking out for indoor unit installation
- Perform installation of the indoor unit
- Perform installation of outdoor unit air-conditioner
- Perform wiring of the split unit air-conditioner
- Check for leakages on split air-conditioner
- Adhere to safety measures
System Evacuation and Purging
- Demonstrate knowledge of system evacuation
- State the purpose of system evacuation
- State types of system non condensable gases in RAC systems
- Perform system evacuation
- Adhere to safety measures
- Demonstrate knowledge of System purging
- Explain system purging
- State types of system purging
- State tools used in system purging
- State the purpose of system purging
- State advantages of system evacuation
- State disadvantages of system evacuation
- Demonstrate skills in system evacuation
- Perform deep evacuation of the refrigeration system
- Perform triple evacuation of the refrigeration system
- Perform pressure measurement at the high side of a refrigeration system
- Adhere to safety measures
- Demonstrate skills in system purging
- Perform system purging on a refrigerator
- Perform system purging using the charging line
- Perform system purging using capillary tube
- Adhere to safety measures
Form 3 (Grade 12)
15 topicsTrade science I
- Demonstrate knowledge of heat energy and heat transfer
- Explain the change of state of matter
- Explain types of latent heat
- Differentiate between saturated vapour and superheated vapour
- Distinguish between saturated liquid and subcooled liquid
- Explain the modes of heat transfer
- Explain the application of latent heat in refrigeration system
- Demonstrate knowledge of fluid density
- Define density of a substance
- Define relative density
- Explain specific volume
- Perform calculations involving density
- Perform calculations involving relative density
- Perform an experiment to determine density of refrigerant oil
- Demonstrate knowledge of accident prevention
- Define pressure and state its unit
- Explain the factors governing fluid pressure
- State Archimedes principles
- Explain various ways of measuring pressure
- Perform calculation involving pressure
- Demonstrate knowledge of simple machines
- Define simple machine
- Explain types of simple machines
- Explain terminologies in simple machines
- Perform calculations on simple machines
Trade science II
- Demonstrate knowledge of mechanical energy
- Define mechanical energy
- Define potential energy
- Define kinetic energy
- Perform calculation on potential and kinetic energy
- Distinguish between elastic and inelastic collisions
- Perform calculations involving kinetic energy in rotation
- Demonstrate knowledge of the effect of forces on material
- Define force and state its units
- Explain compressive force and shear force
- Define stress and strain
- Explain elasticity, plasticity, and elastic limit
- State Hook’s law
- Perform calculation involving stress and strain
- Demonstrate knowledge of angular motion
- Define radian
- Define angular velocity and angular acceleration
- Perform calculations involving angular velocity and acceleration
- Distinguish between scalar and vector quantities
- Explain relative velocity
- Demonstrate knowledge of simply supported beam
- Define moment of a force
- State principle of moment
- Perform calculation involving principle of moments
- Explain types of simply supported beams
- Perform calculation involving simply supported beams with point loads
Trade science III
- Demonstrate skills in of friction in RAC
- Define friction
- Explain the types of friction
- State the factors that affect friction
- State the disadvantages of friction in refrigeration compressor
- Define coefficient of friction
- Perform calculations involving friction
- Demonstrate skills in Thermal expansion
- Explain the effect of temperature on matter
- State practical applications of thermal expansion in RAC
- Explain the expansion and contraction of water
- Define coefficient of thermal expansion
- Define coefficient of linear and superficial expansion
- Perform basic calculations on linear expansion
- Demonstrate skills in torque
- Define couple
- Define torque and state its unit
- Perform calculation involving torque and power
- Perform calculation under kinetic energy and moment of inertia
- State the equation for power in terms of torque and angular velocity
- State the equation for efficiency and perform calculation involving efficiency of belt drives
Material Technology
- Demonstrate knowledge of strength of material
- Explain types of stresses
- Explain cause of stress
- Explain strain
- Explain modulus of elasticity
- Demonstrate knowledge of heat treatment of material
- Explain plain carbon steel
- Explain types of steel
- State the purposes of heat treatment of metals
- Explain heat treatment processes
- State the advantages and limitations of heat treatment
- Demonstrate knowledge of insulating material
- Define insulating material
- State the functions of insulating materials
- Explain the properties of insulating materials
- State the types of insulating materials
Electric Motors
- Demonstrate knowledge of starters
- Explain single-phase motor starting devices
- Explain three-phase motor starting devices
- Explain the difference between a single-phase and three-phase motor
- Explain how the resistance of a three-phase motor is measured.
- Explain how 3-phase motor windings are connected
- State various types of motor protectors
- Demonstrate skills in testing and fixing motor protectors
- Test pilot overload
- Test external overload
- Test internal overload
- Fix pilot overload protector
- Adhere to safety measures
- Demonstrate skills in testing and wiring of three–phase motor
- State the characteristics and parts of a 3-phase motors
- State the controls of 3-phase motors
- State the applications of 3-phase motors
- Test continuity of a 3-phase motor
- Perform wiring on a 3-phase motor with controls
- Adhere to safety measures
- Demonstrate skills in trouble-shooting of electric motors
- Detect fault on motor not starting
- Detect fault on motor humming
- Detect fault on noisy running motor
- Detect fault on motor over heating
- Detect fault on motor giving electric shock
Condenser and cooling towers
- Demonstrate skills in condenser load
- Explain condenser loads
- Explain condenser capacity
- Explain the heat quantity and temperature rise in condensing medium
- Perform calculations on condenser loads
- Demonstrate knowledge of water-cooled/evaporative condenser
- Describe water-cooled condensers
- State types of water-cooled condensers
- Describe evaporative condenser
- State advantages of evaporative condenser
- State applications of evaporative condenser
- State the ratings and selection of evaporative/water-cooled condensers
- Demonstrate knowledge of cooling towers
- Describe cooling towers
- State types of cooling towers
- State the advantages of cooling towers
- State the ratings and selections of cooling towers
- State the applications of cooling towers
- Demonstrate skills in replacing, repairing and serving of condensers and cooling towers
- Replace a condenser in a RAC system
- Perform servicing on condenser fins
- Repair a condenser piping
- Perform servicing on a water cooled condenser
- Perform servicing on cooling towers
- Adhere to safety measures
Evaporator
- Demonstrate knowledge of dry expansion evaporator
- Explain dry expansion evaporator
- Explain evaporator capacity
- Calculate simple overall heat conductance factor (u factor)
- Explain the effect of air quantity on evaporator capacity
- Demonstrate knowledge of flooded evaporator
- Explain construction of flooded evaporator
- Explain flooded evaporator capacity
- Calculate simple overall heat conductance factor (u factor)
- Explain the effect of air quantity on evaporator capacity
- Demonstrate knowledge of forced and natural draught evaporator
- Explain principles of operation of natural draught evaporator
- Explain how forced draught evaporators work
- State how evaporator capacity is control
- Explain the selection and rating of natural draught evaporator
- State applications of forced and natural draught evaporator
- Demonstrate skills in replacing, repairing and serving of condensers and cooling towers
- Perform evaporator servicing in RAC
- Perform leak repairs on evaporator
- Replace an evaporator in RAC system
- Replace evaporator heater
- Adhere to safety measures
Air-conditioning Wiring
- Demonstrate knowledge of General Air-conditioning wiring
- Explain the general wiring of air conditioners
- Describe how a delay timer operates on an air-conditioner
- State the wiring procedures of an inverter air-conditioner
- State the wiring procedures of a Solar split air-conditioner
- Demonstrate knowledge of automobile air-conditioning wiring
- Explain wiring of automobile air conditioners
- Describe how a pressure switch operates on an automobile air conditioner
- Explain the source of power supply to automobile air-conditioner
- State the wiring procedures of automobile air-conditioner
- Demonstrate skills in air-conditioning wiring
- Perform wiring on an air-conditioning fan motor
- Perform wiring on window air-conditioner
- Carry out wiring on a split air-conditioner
- Perform wiring on invertor air-conditioner
- Carry out wiring on Solar split air-conditioner
- Adhere to safety measures
Air-Conditioners
- Demonstrate knowledge of trouble shooting on air-conditioners
- Explain trouble shooting of compressor
- State possible faults of components on a PC board
- State the possible fault on solenoid valve
- State possible causes of frost on evaporator
- Demonstrate skills in trouble shooting on window air-conditioners
- Detect fault on compressor not running
- Perform fault finding on compressor not starting but hums and trips on overload protector
- Detect fault on window unit running on a short cycle
- Identify fault on unit operating continuously
- Adhere to safety measures
- Demonstrate skills in troubleshooting on split air-conditioners
- Detect fault on compressor not running on a split air conditioner
- Perform fault finding on compressor not starting but hums and trips on overload protector
- Detect fault on a split unit running on short cycle
- Detect fault on split unit operating continuously
- Detect open circuit fault
- Adhere to safety measures
Solar powered air-conditioning
- Demonstrate knowledge of basic solar thermal system
- Explain the nature of solar energy
- State component of solar energy heating system
- Explain solar thermal collector
- Explain solar covers
- Explain heat insulation of solar collector surface
- Demonstrate knowledge of solar thermal energy storage systems
- Explain solar energy storage system
- State types of solar energy systems
- Explain heat energy storage in an enclosed water system
- Explain heat energy storage in a warm air system
- Demonstrate knowledge of solar PV
- Explain the process of converting solar energy into electricity
- State advantages and disadvantages of using solar PV system
- State components of solar PV systems
- State types of solar PV systems
- State process of sizing solar PV system
- Demonstrate knowledge of Solar energy cooling systems
- Explain the function of inverters in solar PV system
- State the procedure for determining size of an inverter for PV system installation
- Explain the methods of connecting solar modules
- Explain the installation of air-conditioners using solar PV system
AC Theory
- Demonstrate knowledge of alternating current, power distribution and voltage system
- Explain the concept of basic alternating current
- Explain power distribution
- Explain three phase voltage system
- Explain three phase delta system
- Explain three phase star/wye system
- Demonstrate skills in inductance/reactance
- Explain inductance
- Explain inductive reactance
- Explain capacitive reactance
- Define impedance
- C alculate inductance reactance, capacitive reactance and impedance
- Demonstrate skills in three phase voltage system
- Perform basic calculations on line voltage, phase voltage, power factor
- State advantages and disadvantages of three phase system
- Explain the 277/480 volts system
- Compare three phase systems to single phase systems
Applied Electronics
- Demonstrate skills in connecting and testing a transformer to a PC board
- State the purpose and types of transformer
- Explain the windings of transformers
- Solve simple problems involving number of turns, voltage and current in transformer
- Connect transformer to a PC board
- Test the continuity of a transformer
- Adhere to safety measures
- Demonstrate knowledge of semi-conductor components
- State semi-conductor components
- Explain the semi-conductor components
- Explain semi-conductor circuits
- Explain power rectification
- Demonstrate skills in assembling semi-conductor components
- Assemble half-wave rectifier circuit using diode
- Assemble full-wave centre-tap rectifier using diodes
- Construct a full-wave bridge-type rectifier using diodes
- Fix a capacitor on an electrical circuit
- Adhere to safety measures
- Demonstrate skills in testing and connecting sensing devices
- Explain sensing device
- State types of sensing devices
- State the applications of sensing devices in RAC
- Differentiate between thermistor and transducer
- Test and connect sensing devices to a RAC PC board
- Adhere to safety measures
Installation of Air-conditioners and pump down operation
- Demonstrate knowledge of air-conditioners installation
- Describe materials used for installing split air-conditioner
- State tools used in installing air-conditioners
- Explain factors to be considered in installing an air conditioner
- Describe procedures for installation of air conditioner
- Demonstrate skills in window air-condition installation
- Select appropriate size of air conditioner for installation
- Perform marking out for window unit air-conditioner installation
- Perform installation of window unit air-conditioner
- Perform wiring on window unit air-conditioner
- Adhere to safety measures
- Demonstrate skills in split unit air-conditioner installation
- Perform marking out for indoor unit installation
- Perform installation of indoor unit
- Perform installation of outdoor unit air-conditioner
- Perform wiring on a split unit air-conditioner
- Check for leakages on a split air-conditioner
- Adhere to safety measures
Refrigeration Compressors
- Demonstrate knowledge of reciprocating compressor
- Explain classification of a reciprocating compressor by piston-cylinder arrangement
- Differentiate between reciprocating compressors by their housing
- Differentiate between reciprocating compressors by their drive mechanism
- Describe characteristics of fully welded hermetic compressor
- Describe characteristics of semi-hermetic compressors
- Calculate compression ratio of reciprocating compressor
- Demonstrate knowledge of rotary compressors
- State applications of rotary compressors
- Explain types of rotary compressors
- Explain operation of rotary compressor
- State advantages of rotary compressors
- Demonstrate knowledge of centrifugal compressors
- Describe centrifugal compressor
- Explain operation of centrifugal compressors
- State the applications of centrifugal compressors
- State the advantages and disadvantages of centrifugal compressors
- Demonstrate skills in compressor mounting
- Select type and capacity of the compressor
- Mount compressor on RAC system
- Test for leakages of refrigerant on compressor joints
- Adhere to safety measures
Refrigerant Flow Controls
- Demonstrate knowledge of automatic expansion valve
- Explain principles of automatic flow control
- Describe the design of automatic expansion valves
- State application of automatic expansion valves
- State advantages and disadvantages of an automatic expansion valves
- Demonstrate knowledge of thermostatic expansion valves
- Describe thermostatic expansion valves
- Explain charges of a thermostatic expansion valves
- State the types of sensing element
- Describe the design of a thermostatic expansion valves
- State applications of a thermostatic expansion valves
- Demonstrate knowledge of pressure-flow controls
- Describe low side flow control
- Describe high side flow control
- State application of low side flow control
- State applications of high side flow control
- Demonstrate skills in testing and fixing flow control devices
- Fix capillary tube to a refrigerator
- Fix TEV on an automobile air-conditioner
- Fix AEV on an automobile air-conditioner
- Connect sensing element (bulb) to an evaporator
- Adhere to safety measures
How G3N helps
Turn this syllabus into a pass.
Generic subjects, covered
Guided lessons and quizzes for the mandated generic subjects every CTVET student takes.
Trade-aware support
Tutoring mapped to trade unit specifications, not generic web answers.
Practice that builds skill
Topic quizzes with explanations help competency-based learning stick.
Master Refrigeration AC, offline.
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