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Certified Refrigeration and Air-conditioning Technician Level-II

How It Works

  1. 1. Select Certification & Register
  2. 2. Receive a.) Online e Learning Access (LMS)    b.) Hard copy - study material
  3. 3. Take exam online anywhere, anytime
  4. 4. Get certified & Increase Employability

Test Details

  • Duration: 60 minutes
  • No. of questions: 50
  • Maximum marks: 50, Passing marks: 25 (50%).
  • There is NO negative marking in this module.
  • Online exam.

Benefits of Certification

Rs.3,499 /-

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).

Vskills certification for Refrigeration and Air-conditioning Technician Level-II assesses the candidate as per the company’s need for Refrigeration and Air-conditioning Technician. The certification tests the candidates on various areas in Refrigeration and Air-conditioning.

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.

Note: Please note that the course comes with online e-learning only. No hard copy will be provided.

Why should one take this certification?

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

This Course is intended for professionals and graduates wanting to excel in their chosen areas. It is also well suited for those who are already working and would like to take certification for further career progression.

Earning Vskills Refrigeration and Air-conditioning Technician Level-II Certification can help candidate differentiate in today's competitive job market, broaden their employment opportunities by displaying their advanced skills, and result in higher earning potential.

Who will benefit from taking this certification?

Job seekers looking to find employment in Refrigeration and Air-conditioning departments of various companies, students generally wanting to improve their skill set and make their CV stronger and existing employees looking for a better role can prove their employers the value of their skills through this certification.

Table of Content

Practice Test

Companies that hire Refrigeration and Air-conditioning Technician Level-II

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

By Net banking / Credit Card/Debit Card

We accept Visa/Master/Amex cards and all Indian Banks Debit Cards. There is no need to fill application form in case you are paying online.

Please click buy now to proceed for online payments.

  • Visa Card
  • Master Card
  • American Express


Study of frost free refrigerator

  • Define conventional refrigerator
  • Define frost free refrigerator
  • Features of the household refrigerator

Refrigerator system of frost free refrigerator

  • Construction of the free refrigerator
  • Compressor
  • Parts of a conventional refrigerator
  • Evaparator

Electrical components and their function in a frost free refrigerator

  • Deforst Timer
  • Defrost Heater

Study of wiring, Automatic defrost, heater, Timer fan motor and air duct system

  • Electrical de-frost system
  • Defrost Controls
  • Damper control adjustment

Methodology of Retrofitting

  • Retrofitting of CFC filled refrigerator with the HFC 134a refrigerator
  • HFC’s advantage
  • HFC’s disadvantage
  • Precaution to be taken when retrofitting CFC filled refrigerator with HFC-134a
  • Comparative study of components used for R-12 and R134a.

Details of CFC filled refrigerator with Hydro Carbon blend

  • Retrofit CFC filled refrigerator with the HC refrigerant
  • Refrigerator electrical devices using HC Refrigerants
  • Properties of HC refrigerant
  • Precaution to be taken when retrofit CFC filled refrigerator with HC blend refrigerants
  • Care of handling with hydro carbon cylinders

Refrigerators using different refrigerants

  • The service, components and replacement in HC refrigerator
  • Comparative study on performance of refrigerator

Introduction of Air-conditioning

  • Past Air-conditioning equipments
  • Present Air-conditioning equipments
  • Future Air-conditioning equipments

Air-conditioning Fundamentals

  • Air conditioner

Constructional details of window Air-conditioner

  • Main components of window A/C
  • Front grill
  • Outer cover

Air -conditioning system

  • Air movement in air conditioned area

Electrical components of window air-conditioner

  • Selector switch
  • Thermostat
  • Relay
  • O.L. P.
  • Capacitors

Split Air-conditioning

  • Types of split air-conditioner
  • Condenser
  • Expansion devices
  • Liquid line drier filter
  • Evaporator
  • Liquid suction heat exchanger
  • Suction line accumulator
  • Fan, Fan motor, blower
  • Refrigerant tubing
  • Ventilation of room
  • Drainage of condensate water
  • Functions

Comparison, advantage and disadvantage of split a/c and windows a/c

  • Importance points of spilt a/c
  • Specification of spilt a/c
  • Windows ac unit consist of following components
  • Windows ac system

Air cooled condensers

  • Use of condenser
  • Fin type air cooled condenser

Constructional details and specification of air condenser

  • Detail of air cooled condenser
  • Selection of air condenser
  • Fin is part of tubing
  • Coiled wire uses as fin
  • Circular fin
  • Large multiple fin

Air Filters Their Types and Specification

  • How to clean The Air Filters
  • Types of Air Filters And Their Specifications
  • Prefilters Fine Filters
  • Filters And Maintenance of Filters
  • Electronic Air Cleaners

Air Flow Measurements

  • Room Air Flows
  • Room Units Air Flows

Velocity Meters

  • Explain Air Flow Measurements
  • Velocity And CFM
  • Anemometer
  • Rotating Vane Anemometer
  • Deflecting Vane Anemometer
  • Hot wire Anemometer
  • Air Velocity at Various temperature

Principles of Pipe Sizing

  • Piping Materials
  • Pipe Joints
  • General Design Consideration
  • Sunction Line Size, Discharge Line Size For Air –Conditioners

Study of Service Valves

  • Understand The Service Valve Operation
  • Use of Service Valve For Gas Charging

Defective Window Model Room Air –Conditioner – “Compressor Does not Start’’

Defects in Window Model Air – Conditioner – “Compressor Trips Frequently"

Defects In Window Air –Conditioner - “poor Cooling” – “Evaporator Coil

Defects in Window Air –Conditioner “Poor Cooling”- Unit Running Continuosly

Defects in Split Type –Conditioner “Water Leakge In Indoor Unit”


  • Windows Basics
  • The User Interface
  • Windows Accessories
  • Windows 7
  • Windows 10

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