Vskills has developed a new strategic framework for Skill Development for early school leavers and existing workers, especially in the unorganized sector to improve their employability called Trade Employable Skills (TES).

Trade Employable Skills does effective assessment and certification of candidates in different trade disciplines like Electrical, Electronics, Agriculture, Chemical, Automobile, IT, etc to make them job ready.

Why should one take this certification?

To demonstrate clear understanding and practical aspects and to get a visible recognition for this knowledge.

Table of Content


Practice Test


Companies that hire Air conditioner Mechanic

All small and medium companies need certified employees who have the requisite skills. There are more jobs opening up in the economy on a regular basis with the fast growth of the country.

Apply for Certification

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  • Master Card
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Swaging and copper tube joint

  • The four basic categories of sign are as follows
  • Flaring tool with yoke
  • Tube cutter
  • Pipe bending tool
  • Swaging tools
  • Pinching tools
  • Pressure gauges
  • Compound gauge
  • Thermometer
  • Leak defects
  • Soap bubble method
  • Halide torch method
  • Electronic detector
  • Gauge manifold
  • Sling psycho meter
  • Swaging on copper tubing
  • How to use a brazing torch
  • Acetylene torch
  • Propane turbo torch
  • Kerosene blow lamp
  • Silver brazing
  • Flux

Flaring, flare fitting and testing the joints

  • Flaring necessity
  • Types of flaring
  • Single thickness flare
  • Double thickness flare
  • Flared tubing fittings
  • Pressurizing the joint on tubing

Introduction of Room Air conditioner

  • Air conditioning
  • Automatic air conditioning
  • Air conditioner
  • Air conditioning unit
  • Room air conditioner
  • Mechanical parts
  • Electrical devices / control
  • Splitair conditioner unit
  • Compressor
  • Condenser
  • Filter drier
  • Capillary tube
  • Evaporator
  • Selector switch
  • Thermostat
  • Relay
  • O.L.P
  • SplitA/C condenser fan
  • Window A/C
  • Evaporator fan
  • Capacitors
  • Fan motor
  • Window unit
  • Refrigerant unit
  • Refrigerant control
  • Temperature control
  • Working principle of window A/C
  • Differentiate the window and split AC

Capacitors, Relays, over load protector and Thermostat

  • Capacitors
  • Start capacitors
  • Run capacitors
  • Starting Relay
  • Current ( magnetic ) relay
  • Solid state relay
  • Compressor winding
  • Thermostat and its function
  • Cut- in and cut temperature
  • Differential setting
  • Range setting
  • Hermetically sealed compressor
  • Compressor motor

Check winding in hermetic compressor.

Air flow and its properties

  • Air movement in an air conditioned area
  • Measuring air flow
  • Measurement location for a velocity reverse traverse
  • Anemometer
  • Velocimeter ( Swinging vane )
  • Velocity pressure ( Pilot tube )

Electric wiring of window and split A/C

  • PSC circuit in window A/C
  • The working of split A/C
  • PSC circuit in split A/C

Contamination in hermetically sealed system

  • Introduction
  • Contaminant
  • What is contaminant?
  • Causes of contaminants
  • Effects of contaminants
  • Control of contaminants

Dehydrator (Filter driers)

  • Moisture in the system
  • Effects of excessive moisture
  • Moisture Remover

Use of high purity nitrogen for pressure testing and leak checking

  • Why dry nitrogen should be used?

Evacuation of the Refrigeration System

  • Evacuation
  • Why evacuate
  • How do we evacuate the system
  • Boiling point of water at various pressures
  • Need for vacuum pump
  • What type of vacuum pump
  • Construction of two stage Rotary vacuum Pumps Effects of Altitude
  • Rotary Pumps ( Positive displacement pumps )
  • Rotary vane pumps
  • Gas ballast
  • Without gas ballast
  • With gas ballast
  • Pressure Compound and Vacuum Gauges
  • Refrigerant quantity
  • Charging by liquid or vapour
  • Vapour charging
  • Liquid charging
  • Charging Accurately
  • Refrigerant charging
  • Charging with a charging cylinder
  • Charging by weight
  • Charging by sight glass
  • Charging refrigerant using front line method

Performance test of air conditioner

  • System performance
  • Setting high and low pressure
  • Precaution to be taken

Defects in Split Air – Conditioner “Compressor does not start”

  • Symptom: “Compressor does not start”

Defects in Split Air – Conditioner “Compressor trips frequently”

  • Symptoms: “Compressor trips frequently”

Defects in Split type Air – Conditioner “Poor cooling – Gas Shortage”

  • Symptom: “Poor cooling”
“Exam scheduling to be done through user account” / “Exam once scheduled cannot be cancelled”
Date of Examination
Examination Time
01:00 PM - 02:00 PM
02:30 PM - 03:30 PM
04:00 PM - 05:00 PM
05:30 PM - 06:30 PM
10:00 AM - 11:00 AM
11:30 AM - 12:30 PM

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Tags: Air Conditioner Mechanic, Repair, Hvac