Odisha CHSE +2 VOC Field Technician Air Conditioner study plan

State the four basic components of a vapour-compression cycle and trace refrigerant state (pressure, temperature, phase) at each of the four points

Define sensible heat, latent heat, superheat and subcooling, and compute superheat and subcooling from given gauge and thermometer readings

Convert between pressure-temperature values using a refrigerant PT chart and explain why saturation temperature tracks pressure

Classify air conditioning by application and by equipment arrangement, giving one worked example of each

Explain the difference between refrigeration capacity units (TR, kW, kcal/h) and convert at least five values between them

Describe the construction and function of reciprocating, rotary and scroll compressors and match each to a typical room AC or split unit

Explain the roles of condenser, evaporator, expansion valve and capillary tube in the cycle and identify the state change across each

Compare air-cooled and water-cooled condensers and list the maintenance implications of each

Interpret a psychrometric chart to find dry-bulb, wet-bulb, relative humidity and dew point for three given air states

Explain how room sensible heat ratio influences evaporator selection and coil bypass factor

Identify and explain the function of each control device: thermostat, low-pressure and high-pressure cutouts, overload protector, capacitor, contactor and defrost timer

Trace the electrical control circuit of a split AC from supply through thermostat, contactor coil and compressor terminals

Explain how a thermostatic expansion valve responds to evaporator superheat and describe the effect of a stuck-open or stuck-closed valve

Describe airflow-side components: blower, fan motor speeds, filters, dampers and duct static pressure basics

Diagnose a control-circuit fault given a symptom description, using a logical step-by-step elimination approach

Classify refrigerants by ASHRAE safety group and identify A1, A2L, A3 and B-series hazards in practical terms

Explain the ozone depletion mechanism, ODP and GWP values, and the phase-out status of CFC, HCFC and HFC refrigerants under the Montreal Protocol and Kigali Amendment

State safe handling rules for flammable refrigerants including no ignition sources, ventilation, leak detection and correct recovery practice

Select the correct PPE for brazing, refrigerant charging and electrical work, and describe first aid for frostbite and refrigerant inhalation

Outline the legal and environmental duties for refrigerant recovery, cylinder labelling and record keeping during service

Plan a split AC installation: site survey, indoor and outdoor unit positioning, clearance requirements, pipe route and drainage slope

Size and select copper tubing and flare connections, and describe the correct flaring, bending and brazing procedure with nitrogen purging

Perform evacuation with a vacuum pump and gauge manifold, and state the target micron level and hold-time test

Carry out leak testing with dry nitrogen and soap solution, and describe charging by weight versus superheat or subcooling method

List commissioning checks: electrical supply and earthing, running current, pressures, temperature differential and airflow verification

Explain the function and test procedure for capacitor, contactor, overload relay, PCB control board and thermistor in an AC circuit

Use a multimeter to measure voltage, resistance, continuity and capacitance, and interpret readings against expected values

Connect and read a gauge manifold and clamp meter, and calculate superheat and subcooling from field readings

Describe the safe use of a vacuum gauge, leak detector, anemometer and thermometer in commissioning and fault-finding

Identify electrical faults such as open winding, shorted capacitor, loose terminal and blown fuse from measured values

Build a preventive maintenance schedule covering filter cleaning, coil cleaning, drain pan and drain line, fan bearings, electrical terminals and refrigerant charge check

Diagnose low cooling capacity by systematically checking airflow, refrigerant charge, condenser cleanliness and compressor performance

Interpret pressure and temperature symptoms to distinguish undercharge, overcharge, restriction, air in system and non-condensables

Explain compressor failure modes and the steps for replacement including recovery, flushing, new filter drier and evacuation

Describe customer-facing service reporting: explaining the fault, quoting, documenting work and confirming the repair with the customer

Assemble a practical project portfolio documenting one full mock installation or service job from planning to handover

Demonstrate a timed fault-finding exercise on a training unit and record the diagnostic path taken

Revise the highest-weight domains by re-solving previously missed numerical and diagnostic questions

Complete a full-length mock test under exam conditions and review every wrong answer to its underlying concept

Prepare a final one-page summary sheet of formulas, safety limits and key values for last-minute revision