| Chapter | Description | DurationHours | DurationMinutes |
| Safety Precaution for Ref and Air conditioner | a. Individual Safety b. workshop Safety | 10 | 0 |
| Files | Specification of files | 10 | 0 |
| Filling flat | Different grade, cuts of files. Application of each cut of files | 10 | 0 |
| Filling flat | Length measurement Engineers steel rule, Try square, Jenny calipers, Hacksaw frame and blade, bench vice | 10 | 0 |
| Practice of sawing | Features of hacksaw blades and their uses and specification. Bench vice parts and specification | 10 | 0 |
| Practice of sawing | State the uses of radius gauges, Features of radius gauges and surface gauges. State the functions of drills. Types and uses of chisels. Different types of drilling machines | 10 | 0 |
| Drilling and chipping | Features of bench, pedestal and hand grinders | 20 | 0 |
| Grinding | Types of marking punches -Length measurement, SL unit - Uses of Try square, scriber and divider | 20 | 0 |
| Types of filling | -Features and uses of vee block. - Use of angle and surface plates | 10 | 0 |
| Pipe hacksawing drilling and internal threading | Advantages and disadvantages of pipe vice | 10 | 0 |
| Pipe hacksawing drilling and internal threading | Counter sinks. angles of counter sinking -Represent counter sink holes in drawing -Counter boring and spot facing | 20 | 0 |
| Counter boring | Uses of solid cold punch. Types and use of self tapping screws | 10 | 0 |
| Making hole and securing sheetmetal by screws | Thread forming and cutting type | 10 | 0 |
| Making hole and securing sheetmetal by screws | Features of different types of vee threads. ISO metric thread, BSF thread. -Different types of tap, tap wrenches and uses | 20 | 0 |
| Handle crank marking square holes | Die and stock | 10 | 0 |
| Handle -crank marking square holes | Uses of reamers. Advantages of reaming. Types of reamers | 20 | 0 |
| External threading and square slot filling | Distinguish between hand reamer and machine reamer. Determine the hole size of reaming | 10 | 0 |
| External threading and square slot filling | General features of hand reamers | 20 | 0 |
| Reaming drilled holes using and reamers | Materials for specified reamers. Types of metal sheet used in sheetmetal work | 10 | 0 |
| Mark straight lines using steel rules and scribers | State the features of a snip and its uses | 10 | 0 |
| Cutting sheet by straight snip | shapes of the blades in straight and bent snip | 10 | 0 |
| Cutting sheet by bent snip | State the uses of folding tools. Types of notches and their uses | 20 | 0 |
| Folding sheets | Define riveting. Uses of rivets | 10 | 0 |
| Riveting with rivet set in sheetmetal work | Types of rivets and materials | 10 | 0 |
| Riveting with rivet set in sheetmetal work | Riveted joints types | 20 | 0 |
| Joining sheetmetal by using rivet set and snap | Removing of faulty riveting joints | 20 | 0 |
| Setting up oxy acetylene plant | Features of oxygen and acetylene regulators, hose pipes uses in gas welding. Use of spark lighter cylinder trolley, blow pipes and their function. Types of gas flame combination. Use of different gas flame combination | 20 | 0 |
| Setting of oxy acetylene flame | Differentiate cutting and welding blow pipes | 10 | 0 |
| Strip the cable covering | Accidents in general terms and safe attitude | 10 | 0 |
| Practise safe method-lifting and handling fire flighting | First air and safety practice | 10 | 0 |
| Identification and use of screws, screw drivers and pliers | Necessity of electrical joints. Types of joints and its uses. Details of electrical soldering methods. Differentiate types of current. Electrical measuring instruments | 10 | 0 |
| Make joint in stranded conductors | Electricity, power and energy in simple electrical circuit. | 10 | 0 |
| Determine the relationship between V,I,R in a DC circuit | State the uses of series connection. Positive and negative ground. Defects due to short circuit. Effects of open circuit. State the uses of parallel connection | 10 | 0 |
| Verify the characteristic of the DC series circuit 1.34B | State the relation between mechanical and electrical power | 10 | 0 |
| Measure power directly and indirectly. Measure energy in single phase circuit | Working principle of single phase energy meters. State the necessity and operation of tong tester. Explain the method of measuring AC/DC volts, current and resistance by multimeter. Types of multimeters. Uses of an insulation tester | 10 | 0 |
| Measure the current of a given load in an AC circuit without interrupting connection. Use multimeter. Measure the insulation resistance using an insulaiton tester | Advantages of multi range meters. Steps to be followed while using multirange and multimeters Necessity of continuity test. Method of testing for grounding in electrical appliances. Check and finding methods of fixed resistors value | 10 | 0 |
| Measuring voltage and current using multimeter. Wire and test a continuity tester circuit. Identifying checking finding value of fixed resistors | Types of ohmmeter. Basic function and application of different types of transformers. Basic functions, types factors, specifications of the capacitors | 10 | 0 |
| A.C.Motors | Types, grades and sizes of insulated wire and cables their selection and use. List of material for wiring | 10 | 0 |
| A.C.Motors | A.C.Motor, starters and trans-former. Their working principles, specification and use. Care and safety. Run/start capacitors and PTCs. Motor protection devicces. Temperature rise of windings | 10 | 0 |
| A.C.Motors | A.C.Motor starters and trans-former. Their working principles, specification and use. Care and Safety. | 10 | 0 |
| Introduction to Electronics. | Introduction to Electronics. Princples and Application Basic Principles of Diodes, Semiconductors, Amplifiers, Transistors, SCR's | 10 | 0 |
| Introduction to Electronics. | Rectification-zener diode as voltage regulator-transistors parameters-CB, CE, CC, con-figuration, amplification | 10 | 0 |
| Introduction to Electronics. | Photo diodes - photo transistors, multi-vibrator, CR and LR circuit. SCRs, UJTs, ICs. | 10 | 0 |
| Introduction to Electronics. | Thermistors, RTDs, Electronic Thermostats. Principles of Re-mote controls and controllers. | 10 | 0 |
| Introduction to Electronics. | Use and function of Contractors/Starters, Crankcase Heaters, Pressure Controls, Solenoids, Timers both Electromechanical and Solid State. | 10 | 0 |
| Fundamentals of Refrigeration | Fundamentals of Refrigeration and understanding and typical Refrigeration Syster, its components, working etc | 10 | 0 |
| Fundamentals of Refrigeration | Temperature Pressure Relation-ships, The refrigeration cycle. Sensible and Latent Heats. Su-perheating and sub-cooling | 15 | 0 |
| Understanding of Cu tubes | Understanding Cutubes used in Refrigeration; soft Annealled, Hard drawn etc. and cleanliness of Cu tubes used in Refrigeration. Flared, compressed and brazed joints, standard flared and other fittings aailable-brass and copper. | 15 | 0 |
| Understanding of Cutubes | Theory of Brazing. Safe handling of cylinders. Care to be taken whilst preparing joints for Brazing. Flame Chemistry and temperature. Use of right torches, tips and flame. Use of appropriate Brazing filler rods and fluxes. | 5 | 0 |
| Working principles of Hermetic and open type compressors of the Reciprocal Rotary, Scroll | Working principles of Hermetic, Semi Germetic and Open type compressors of the Recip-rocal, Rotary, Scroll and Rotary | 15 | 0 |
| Working principles of Hermetic and open type compressors of the Reciprocal Rotary, Scroll | Wobble plate compressos used in Auto AC Understanding th eworking of the Lubrication system, shaft seals in open compressors and capaicity control of multicylinder compressors. | 15 | 0 |
| Basic Evaporation | Basic Evaporation proces on the PH chart. Types of Evaporators like -Dry Expansion type, Shell andtube, DX type, Flooded type, Role of Accumulator, Importance of Superheat, Distribution of circuits. | 10 | 0 |
| Condensers | Role and operation of condensers. Condenser capacity | 20 | 0 |
| Metering Devices | Metering Devices. 1) Role 2) Types of metering devices fixed and modulating orifice controls. 3) Capillaries 4) Fixed orifices. 5) Float valves-Low Side, High side. Constant pressure Exp-valves 7) Thermostatic Expansion Valves 8) Electronic expansion valves | 20 | 0 |
| Liquid Distributors and their role | Liquid Distributors and their role Refrigeration cycle accessories and their role * Filter drivers * Sight glass Suction Line Accumulator Crankcase heaters Hot gas mufflers Oil separators Receivers Heat Exchangers. | 20 | 0 |
| System and Operating controls | System Controls : Basic Controls, Operated by Temperature (Thermostats) Humidity (Humidistats) pressure (pressure stats) Time (Time Switch) | 20 | 0 |
| System and Operating controls | Operating Controls: Refrigerant solenoid valves. Four way Revesing Valves. Back pressure valves. Check valves. Safety Controls. Electric overload protectors. Pressure safety switch. | 10 | 0 |
| Refrigerants | Refrigerants. Historical Developments till today. Physical and chemical properties adn Environmental habards of CFCs and HCFCs. Montreal protocol and India's CFC/HCFC phase of out schedules. OZone Rules 2000. Substitute refrigerants in lieu of CFC's their properties and com-parison with CFCs, HFCs and HCs wrt component changes flammability etc. | 20 | 0 |
| Refrigerants | Need for elimination of refrigerant emissions through; Recovery/Recycling; Good Brazed joints; Proper leak testing before charging refrigerant. Importance of cleanliness and Hygiene in a refrigeration system. Importance of evacuation of Moisture and Non condensable. Gases from a refrigeration system and the need for Rotary 2 stage Vacuum pumps to reach the needed vacuum levels. Understanding of units used to de-fine vacuum levels. | 10 | 0 |
| Changes in components | Same as for previous week | 20 | 0 |
| Study construction | Changes in components and practices whilst retrofitting CFC appliances with HC and HFC refrigerants. a) HCs-Flammability is-sues to be addressed using sealed components. b) HFCs-Changes in compressors, luboil, need for filter driers of XH7/XH9, and greater risk of moisture absorption and system failures. | 10 | 0 |
| Study construction | Study construction of the Refrigerator and components like door, gaskets, PUF Insulation, chiller tray, crisper etc. Electrical components and wiring drawings, Ref sealed system, Roll bond evaporators, Suction Heat exchanger, open and concealed clean back condensers. | 10 | 0 |
| Study construction | Study construction of Frost Free (2 or 3 door ) Refrigerator parts particularly, the forced draft cooling. Air Duct circuit, the temperature control in Freezer and Refrigerator the Evaporator, the automatic defrost system the hot gas lines to prevent condensation on cabinet. The Electrical system. | 20 | 0 |
| Study construction | Theory behind the causes of the problem and the analytical approach to trouble shooting need for right instruments and tools to trouble shoot. | 20 | 0 |
| Study of construction and functioning of WRAC | Stydy of construction and functioning of WRAC. Role of each component. Principles of working. Evaporative cooling of condenser. | 20 | 0 |
| Split ac and window ac | Study of split Acs/ Room unit and Condensing unit. Principles of pipe sizing and study of service valves for chaging at site. Principles of working of Infrared remote control and understanding Electrical/Electronic circuitry. Condensate removal from room units and need for traps. | 20 | 0 |
| Importance of maintaining filter cleanliness | Importance of maintaing filter cleanliness. The problems in installation with Evaporator at higher/lower levels and vice versa. Also use of right instruments and tools to trouble shoot. | 20 | 0 |
| Study of refrigerant systems in Auto Ac and Air flow | Study of Refrigerant systems in Auto AC and Air flow and direction control in Evaporator. How performance varies with compressor/engine speed. Difference in R-12 and R-134 a system Temp, control in the cab Electrical / Electronic wiring diagram. | 20 | 0 |
| Analytical approach | Theory behind the problems listed under Trouble shooting and analytical approach to trouble shooting. | 20 | 0 |
| Evaporators and Condensers | Description, construction, function of different types of blower and fans, motors eve. used for Evaporators and Condensers. | 20 | 0 |
| Start and Run capacitors | Role of Start and Run capacitors, relays and PTCs. | 20 | 0 |
| Explanation of Water , Refrigeration, Electrical and Retrofitting | Explanation of a) Water storage, distribution and drainage. b) Refrigeration system using R-22 components in lieu of R-12. c) Electrical and control system d) Insulation e) Retrofitting with HFC 134a or HCs. | 20 | 0 |
| Construction and function | Chest type bottle coolers, Deep Freezers and Visi coolers, Description, Construction and function. Substitution R-12 with R-134 a or Hydrocarbon. | 20 | 0 |
| Functions and applications | Ice Candy plant and Ice Cream storage. Their types function and application. Retrofitting CFC12 plants with HFC 134a | 20 | 0 |
| Functions and applications | Performance of reciprocating compressor metric efficiency, factor influencing volumetric efficiency. | 20 | 0 |
| Functions and applications | Commercial type reciprocating compressor-their type construction and application | 20 | 0 |
| Compressor lubrication | Compressor lubrication. Types of lubrication Splash and forced feed. Compressor oil function and characteristic | 10 | 0 |
| Multistage compressor | Compressor capacity control. Different method and application | 20 | 0 |
| Centrifugal compressor | Centrifugal compressor, Construction and Application Refrigerants used. Alternatives to R-11, like R-123 to R-12 like R-134. Screw compressor chillers, types construction | 15 | 0 |
| Condenser | Condenser-its type and capacity water cooled condenser their type, construction and application | 15 | 0 |
| Evaporative condenser | Evaporative condenser-their function, construction and application | 15 | 0 |
| Cooling tower | Cooling tower-its principle, type, capacity, construction and disadvantage of different types of cooling towers. Selection of site, efficience. Wet bulb temp and C.T. approach. | 20 | 0 |
| Conditioning systems | Water conditioning scale and deposit control, corrosion and its control Slime and Algae-water conditioning systems | 15 | 0 |
| Principles of working of a pump | Principles of working of a pump. Causes of commonly faced problems like poor pumping air leaks, high power consumption | 20 | 0 |
| Introduction to standard | Introduction to standard fittings, valves etc. used inchilled water, condenser water and drain lines. | 20 | 0 |
| Plates and Tube | Plates and Tube forced air DX evaporators. Types of Deforst systems and condensate disposal. | 20 | 0 |
| Suc-liquid Heat Exchangers | Suc-liquid Heat Exchangers, Their function, construction, application and advantages | 20 | 0 |
| Study of controls and electrical | Study of controls and electrical wiring disgrams used in cold storage / commercial refrigeration. | 15 | 0 |
| Water / Brine | Water/Brine chillers. Types of Brines used as secondary refrigerants | 20 | 0 |
| Food preservation spoilage | Food preservation spoilage agents - control of spoilage agents, preservation by refrigeration. | 20 | 0 |
| Cold storage | Cold storage-type construction capacity and specification | 20 | 0 |
| Method of installing compressor | Method of installing compressor vibration eliminator and shock absorber their type and application | 20 | 0 |
| study of layout and electric | Study of layout and electric wiring of the storage plant | 20 | 0 |
| Method of pressure testing | Method of pressure testing leak detection and evacuating the system. | 20 | 0 |
| Testing efficiency | Method of charging gas to the system and testing efficiency. | 15 | 0 |
| Cold storage plant operation | Cold storage plant operation. Its common trouble and remedies | 20 | 0 |
| Fundamentals of Central Air conditioning | Fundamentals of Central Air conditioning Comfort Air conditioning - Comfort Air conditioning conditions. Psycohometrics. Dry and Wet Bulb, Dew point temperatures. Introduction to psychometric charts. | 20 | 0 |
| Various types of AC | Various types of Central AC like. All air, All water, Air water and Unitary AC assessing air flow requirements and distribution. Blowers, fans, working principles, static and velocity pressures. | 20 | 0 |
| Duct systems | Duct systems-Principles of locating outlets, ducts and equipment. Basis of Duct sizing. | 10 | 0 |
| Duct systems | Basics of indoor air qualityparticles, vapours and gases. Types of filters-prefilters, flat and vee type, pleated type, Electrostatic, HEPA and Electronic filters. | 20 | 0 |
| Construction and study of commercial | Construction and study of commercial split systems and packaged ACs, Air and water cooled. | 20 | 0 |
| layout and modulating | Understanding Central station AHUs and FCUs using chilled water, understanding chilled water layout and modulating valves for temperature control. Expansion tanks. | 20 | 0 |
| Controls used in Ac systems | Controls used in AC systems. Electromechanical, pneumatic and Electronic. | 10 | 0 |
| Introduction to load calculation | Introduction to load calculation in AC buildings. Sensible and latent heats. | 10 | 0 |
| Methods of leak detection | Methods of leak detection, evacuaiton, charging gas, testing systems. | 15 | 0 |
| System service and problem analysis | System service and problem analysis a) Proper temp. and pressures at various location. b) Thermostat settings c) NNoises d) Electrical measurements e) Methods of measuring superheat and subcooling f) Effects of overcharge and undercharge | 20 | 0 |
| Testing of Auto AC Systems | Performance testing of Auto AC Systems Bus and Rail AC | 15 | 0 |
| Testing of Auto AC Systems | Steps needed during retrofitting. Component changes. Performance variations after retrofit. Cost of retrofit. | 10 | 0 |
| Instruments/tools | Review of commonly faced problems and analytical approach to problem solving using right instruments/tools | 20 | 0 |
| Safety measures and steps | Review of safety measures and steps. Retrofitting of sealed components. | 20 | 0 |
| Maintenance | Ice Candy Plant, ther maintenance, trouble diagnosis and remedies. | 20 | 0 |
| Subject Specific Soft Skills | Soft skill related to Mechanic Refrigeration and AC like do not compromise on swaging, flaring, brazing, tube cutting, tools, gas charing, testing refrigerants, plants, window AC, Spilit AC, condenser, evaporator, expansion valve, safety equipments, gloves etc., | 20 | 0 |
| Subject Specific Soft Skills | Soft skill related to Mechanic Refrigeration and AC like do not compromise on swaging, flaring, brazing, tube cutting, tools, gas charing, testing refrigerants, plants, window AC, Spilit AC, condenser, evaporator, expansion valve, safety equipments, gloves etc., | 20 | 0 |
| Soft Skills - General Module | * Introduction * Basics of Grammar * Communication Skills * Learn Continuously * Behavior and Attitude * Discipline and Punctuality * Honesty and Transparency * Respect for Rules and Regulations * Time management * Team Work * Relationship Building * Ethics and values * Safety Conscious and Safe Working Practices * Concern for Quality * Customer Service * Environment and waste disposal | 20 | 0 |