| Module |
Sub Heading |
Topics |
Marks |
| Module I
Fitting, Sheet metal
& Welding |
Safety |
- Safety precautions
- First Aids
- Personal Protective Equipment (PPE)
- Fire fittings equipment
- Electrical safety
|
02 marks |
| Fitting |
- Different types of fitting hand tools, power tools
- Functions, constructions, specifications & application of hand tools and power tools
- Care and maintenance of hand tool & power tools
- Machineries and equipment like drilling machines, grinding machines etc
- Function, construction, specification, application,
care & maintenance of machineries & equipment
- Precision measuring instruments like vernier calliper, micrometers, vernier height gauge etc
- Functions, constructions, specifications & application of precision instruments
- Care and maintenance of precision instruments
|
03 marks |
| Sheet metal |
- Sheet metal tools, instruments, equipment
- Construction, working, use, application and 2 specification
- Care and maintenance of sheet metal tools,
instruments& equipments
- Types of sheet metal joints
- Rivets & riveting, their types and uses
|
02 marks |
| Welding |
- Welding tools and equipments, types specifications and use
- Oxy-Acetylene welding equipments & accessories
- Gas welding hand tools and safety apparels
- Arc welding accessories
- Classification of welding process
- Methods of gas welding
- Use of Oxy Acetylene, Oxy LPG, Air LPG and two
stage regulator
- Types of weld
|
02 marks |
| Module II
Electrical |
Electrical |
- Electrical terms such as AC and DC supply, voltage, current, capacitors, resistors, power, energy, frequency etc
- Conductors and insulators
- Series circuits, parallel circuits, open circuits, short circuits
- Material used as conductors
- Joints in conductors
- Measuring instruments such as voltmeter, ammeter, ohmmeter, energy meter, frequency meter etc
- Earthing and its importance
- Earth resistance, insulation, and continuity testing
|
03 marks |
| AC Motors |
- Single phase and three phase motors
- Construction and working principle of Capacitor start Capacitor run induction motor (CSR), Split phase induction motor (RSIR), Capacitor start induction motor (CSIR),Permanent Capacitor or capacitor run induction motor (PSC), Resistance start capacitor run induction motor (RSCR), Shaded pole motor etc
- Centrifugal switch
- Methods of changing the direction of rotation
- Construction and working principle of squirrel cage induction motor, slip ring induction motor
- Common faults, causes and remedies in single phase and three phase motors
|
03 marks |
| Motor starters |
- Construction and working of Single phase and three phase motor starters such as DOL starter, Star delta starter, Auto transformer starter, Rotor resistance starter
- Common faults, causes and remedies in single phase and three phase motor starters
|
02 marks |
| Module III
Electronics |
Electronic Components |
- Active and passive components
- Resistor, Capacitors, Semiconductors, Diodes, Transistors etc
- Rectifiers (Half wave, Full wave, Bridge rectifier
etc )
- Zener diodes, voltage regulator, Amplification
- Transistors-CB,CE,CC Configuration
- Photo diodes, Photo transistors, Multi vibrator,
SCRs, UJTs, ICs etc
|
02 marks |
| Module IV
Basic
refrigeration |
Refrigeration
tools,
instruments
,and
equipments |
- Refrigeration tools, instruments, and equipments
- Construction, working, use, application and
specification
- Care and maintenance of refrigeration tools,
instruments& equipments
|
04 marks |
Fundamentals
of
refrigeration |
- Fundamentals of refrigeration
- Science related to refrigeration such as units, mass, weight, work, power, energy, force, pressure, heat, temperature, sensible heat, latent heat, super heating, sub cooling, saturation temperature, boiling point , freezing point, etc
- Laws of thermodynamic, Laws of perfect gases
|
05 marks |
| Different types of refrigeration system |
- Construction and working of ice refrigeration
- Construction and working of Dry ice refrigeration
- Construction and working of Water vapour
refrigeration
- Construction and working of Liquid gas/ Evaporative/ Steam jet/ Thermo electronic refrigeration
- Construction and working of Vapour absorption
refrigeration cycle
- Construction and working of Vapour compression cycle, fundamental operations, Sub cooling and super heating
- Application of vapour compression cycle
- COP, Ton of Refrigeration
- Study of Ph, Ts, Pv diagram
|
03 marks |
| Module V
Refrigeration
equipments |
Compressor |
- Construction, working, types and application of different compressors such as Reciprocating, Rotary, Scroll, Screw, Centrifugal, Swash plate etc
- Volumetric efficiency, capacity control, factors
influencing volumetric efficiency, piston displacement, compression ratio etc
- Compressor lubrication oil, properties, types and
lubrication methods
- oil separator
- Advantage and disadvantage of different types of
compressors
- Common faults, care and remedies in compressor
|
05 marks |
| Condenser |
- Construction, working, types and application of
condensers such as air cooled, Water cooled,
evaporative
- Capacity of condensers, factors affecting the
condenser capacity
- Advantage and disadvantage of different types of
condensers
- De-scaling, methods of descaling, fouling factor
etc
- Liquid receiver
- Drier, types and application
- Description of desiccants
|
03 marks |
| Cooling tower |
- Construction and working principles of different
types of cooling towers
- Types of cooling towers
- Capacity of cooling towers, factors affecting the
cooling tower capacity
- Advantage and disadvantage of different types of
cooling towers
- Cooling tower approach, range, efficiency etc
- Water treatment, water softening plant
|
03 marks |
| Expansion valve |
- Construction and working principles of different
types of expansion valves such as Thermostatic expansion valves (TXV), Automatic expansion
valves (AXV), Float valve, Electronic expansion
valves, Level master control (LMC),Capillary tubes
etc
- Selection of expansion valves
|
03 marks |
| Evaporator |
- Construction and working principles of different
types of evaporators
- Capacity of an evaporator, factors affecting the
capacity of an evaporator
- Types of evaporators such as Natural convention, forced convention, flooded evaporator, Dry expansion evaporator, Bare tube coil evaporator, Finned tube
evaporator, Plate evaporator, Shell and tube, Shell and coil, Tube in tube evaporator, frosting evaporator, non frosting evaporator etc
- Methods of defrosting such as Manual defrosting,
Pressure control defrosting, Temperature control
defrosting, Water defrosting, Reverse cycle defrosting, Simple hot gas defrosting, Automatic
defrosting, Electric defrosting etc
- Accumulator
- Heat exchanger, their function, construction,
application & advantage
|
02 marks |
| Module VI
Refrigerant |
Refrigerant |
- Properties of refrigerant
- Classification of refrigerants
- Alternative refrigerants
- Climatic impact of refrigerants
- Ozone depletion potential (ODP)
- Green house effect- global warming (GWP)
- ODP & GWP of various Refrigerants
- Numbering of refrigerants
- Refrigerant cylinders, Cylinder colour coding
- Handling of refrigerant cylinders & Flammable
refrigerant
- Refrigerant leak detection methods
- Flushing, leak testing, Evacuation, Gas charging
in different system
- Retrofitting
|
05 marks |
| Module VII
Refrigeration
system |
Refrigerator
(direct cool) |
- Construction and working principles of single door
direct cool refrigerator
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Door gasket
- Heat insulation materials, types & properties
- Trouble shooting of refrigerator
- Installation method
- Care and maintenance of refrigerator
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
|
03 marks |
| Frost free refrigerator |
- Construction and working principles of frost free
refrigerator (2 or 3 door)
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting of frost free refrigerator
- Care and maintenance of frost free refrigerator
- Installation method
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
|
02 marks |
| Refrigerator (inverter technology) |
- Construction and working principles of refrigerator
- Refrigeration cycle & Air cycle
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting of refrigerator
- Care and maintenance of refrigerator
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
|
01 marks |
Water cooler &
Water dispenser |
- Construction and working principles of water cooler & water dispenser
- Types of water cooler & water dispenser
- Refrigeration cycle of water cooler & water dispenser
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting of water cooler & water dispenser
- Care and maintenance of Water cooler & Water dispenser
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
- Insulation materials
|
02 marks |
Visible cooler &
Bottle cooler |
- Description, Construction and working principles
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting of visible cooler & bottle cooler
- Care and maintenance of visible cooler & bottle cooler
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
|
01 marks |
Deep
freezer/Dis
play
carbine |
- Description, Construction and working principles
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting
- Care and maintenance
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
- Installation method
|
02 marks |
Ice cube
machine/Soft
y machine |
- Description, construction, working
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting
- Care and maintenance
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
- Installation method
|
01 marks |
| Module VIII
Air
conditioning
system |
Window Air
Conditioner |
- Construction and working principles
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting and servicing
- Installation method
- Care and maintenance of refrigerator
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
- Energy Efficiency Ratio(EER)
- Energy Efficiency labeling on Air-Conditioning system
|
05 marks |
Split Air Conditioner (Wall
Mounted, Floor,
Ceiling/Cassette
mounted, Duct
able) |
- Construction and working principles
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting and servicing
- Installation method
- Care and maintenance of refrigerator
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
- Energy Efficiency Ratio(EER)
- Energy Efficiency labeling on Air-Conditioning system
|
02 marks |
| Multi split Air Conditioner |
- Construction and working principles
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting and servicing
- Installation method
- Care and maintenance of refrigerator
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
|
02 marks |
| Inverter Split Air Conditioner |
- Construction and working principles
- Study the electrical and mechanical components
- Testing of electrical and mechanical components
- Trouble shooting and servicing
- Installation method
- Care and maintenance of refrigerator
- Leak testing, Evacuation, Gas charging
- Electrical circuit diagram
|
01 marks |
| Module IX
Commercial
Refrigeration
and air
conditioning
system |
Ice candy plant |
- Function, construction, Working principle
- Circuit diagram
- Capacity & types of compressor used
- Brine solution types, properties
- Testing of electrical and mechanical components
- Trouble shooting and servicing
- Installation method
- Care and maintenance of refrigerator
- Leak testing, Evacuation, Gas charging, Retrofit
|
01 marks |
| Ice plant |
- Function, construction, Working principle
- Circuit diagram
- Capacity & types of compressor used, agitator
- Brine solution types, properties
- Testing of electrical and mechanical components
- Trouble shooting and servicing
- Installation method
- Care and maintenance of refrigerator
- Leak testing, Evacuation, Gas charging
|
02 marks |
Walk in cooler
& reach in cabinet |
- Function, construction, Working principle
- Circuit diagram
- Capacity & types
- Trouble shooting and servicing
- Installation method
- Care and maintenance of refrigerator
- Leak testing, Evacuation, Gas charging
|
01 marks |
| Cold storage |
- Function, construction, Working principle
- Controls & Circuit diagram
- Capacity & types of cold storage and its details
- Trouble shooting and servicing
- Installation method
- Care and maintenance of refrigerator
- Methods of Leak testing, Evacuation, Gas charging
- Food preservation
- Maintaining temperature in different places
- Properties of commonly used refrigerants like ammonia and its safe handling
- use of vibration eliminator and shock absorber
- Mobile refrigeration in transport vehicle
- Deep freezing, Freezing tunnel, Blast freezing
|
03 marks |
| Psychrometry |
- Requirement of comfort Air-Conditioning
- Study of psychrometric terms-DBI, WBT, RH, enthalpy, dew point, specific humidity etc
- Study of psychrometric chart-Dry bulb temperature line, Wet bulb temperature line, Specific humidity or moisture content line, Dew point temperature line, Enthalpy (total heat) line, Vapour pressure line, Relative humidity line etc
- Study of psychrometric process-Sensible heating, Sensible cooling, Humidification & Dehumidification, Cooling and adiabatic humidification, Cooling and humidification by
water injunction, Heating and humidification,
Humidification by steam injection, Adiabatic chemical dehumidification etc
- Heat load calculation for commercial and industrial
buildings
|
04 marks |
Central Air Conditioning
system/ HVAC plant |
- Introduction to HVAC
- Fundamentals of central Air-Conditioning/ HVAC plant
- Types of central Air-Conditioning (direct & indirect)
- Construction & Working
- Components, Fault, Care & Maintenance
- Temperature & pressure control used in AC plant
- Construction and working of safety devices in AC plant
- Cooling tower, Pipe lines
- Preventive maintenance schedule of central Air Conditioning plant
- Maintain log book for daily operation
- Modulating valve for temperature control
- Package chiller, Screw chiller, Reciprocating chiller
- Humidity control
- Humidifier
- Dehumidifier
- Air washer
- AHU, FCU
- Chilled water system
|
03 marks |
Package Air Conditioner (Air cooled, Water cooled
condenser) |
- Construction & working principles
- Types, application
- Installation methods
- Trouble shooting
- Care and maintenance
- Temperature & pressure control
- Construction and working of safety devices
|
01 marks |
| Split package |
- Construction & working principles
- Types, application
- Study of various electrical & mechanical components
- Installation methods
- Trouble shooting
- Care and maintenance
- Temperature & pressure control
- Construction and working of safety devices
- VRV/VRF system
- Details of piping
- Common reason for error code
- Types of ODU & IDU
|
01 marks |
| Duct |
- Function, types
- Classification of ducts
- Materials used for ducting
- Duct designing
- Pressure in ducts
- Duct insulations
- Properties of insulation materials
- K-factors
- Acoustic insulation
- Air distribution methods
- Air flow
- Fan and blower
- Function, types, classification of fan & blower
- Static & Velocity pressure measurements
|
04 marks |
| Air Filter |
- Construction, Function of air filters
- Types of air filters
- Care & maintenance of air filter
- Effect of chocked air filter
- Clean room
|
03 marks |
| Module X
Automobile
Air Conditioning |
Car Air Conditioner |
- Construction, working
- Study various electrical & mechanical components
- Testing components
- Electrical circuit diagram
- Fault detection
- Leak testing, evacuation, gas charging
- Installation
- Trouble shooting
- Magnetic clutch operation
- Free wheeling
- Care and maintenance
|
02 marks |
Mobile AirConditioner
(Bus, Train) |
- Study the refrigeration cycle in automobile AC
- Construction and working of bus AC
- Magnetic clutch operation, free wheeling
- Refrigerant used HCFC-22, HFC_134a, HFOs, Blends of HFCs, and HFOs
- Construction and working of train AC
- Trouble shooting of Bus AC & Train AC
- Planning for Preventive maintenance and scheduling
- Maintenance actives in large AC and Refrigeration plant
|
01 marks |
