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Certified Electronics Choke and CFL Technician

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).

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 Electronics Choke and CFL Technician

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.

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  • Visa Card
  • Master Card
  • American Express


  • Wire-wound resisters 
  • Carbon composition resisters 
  • Metal film resisters 
  • Carbon film resistors 
  • Specification of resistors
  • PTC resistors ( Sensistors )
  • NTC resistors (Thermistors)
  • VDR (varistors)
  • Light dependent resistors (LDR)
  • Marketing codes for resistors 
  • Resistors and tolerance value of color coded resistors
  • Resistance value 
  • Tolerance value 


  • Construction
  • Function
  • How a capacitor stores charge ?
  • capacitance
  • Sub-units of a farad 
  • Factors determining capacitance 
  • Area of the plates
  • Distance between the plates 
  • Type of dielectric material
  • Temperature 
  • Types of capacitors 
  • Common defects in capacitors 

PN junction diodes 

  • PN junction 
  • The internal barrier potential (VB)
  • Biasing the PN junction 
  • V-I characteristic of PN junction 
  • Application of diodes 
  • Important specifications of diodes
  • The material 
  • Maximum safe reverse voltage 
  • Maximum average forward current 
  • Forward voltage drop 
  • Maximum reverse current 
  • Maximum forward surge current 
  • The maximum junction temperature 
  • Manufacturer’s code of Diodes 
  • Diode equivalent 
  • Classification of Diodes 
  • Types of diode packaging 

Transistors and their classification

  • Introduction to Transistors
  • Based on semiconductor used 
  • Based on the way P and N junction are organized 
  • Based on the power handling capacity of transistors 
  • Based on the frequency of application 
  • Based on the manufacturing method 
  • Based on the type of final packaging 
  • Junction test 
  • Quick TURN-ON test 

Printed circuit boards (PCBS) 

  • Limitations of Tag-Lug boards 
  • Printed circuit boards 

Printed circuit boards – etching, component side marking and mounting components 

  • Etching 
  • Drilling holes on PCBs 
  • Preparing and marking component layout 
  • Mounting components on PCB 
  • Shaping the component leads 
  • Due to the component weight 
  • Due to shock 
  • Due to vibration 
  • Due to temperature 
  • Stress relief measures 
  • Order of soldering components

Types of electronic circuit boards and method of mounting component on boards

  • Type of boards
  • Securing and fixing of components
  • Preparation of component
  • Shaping and fixing of components
  • Bending and trimming
  • Order of mounting 

Soldering Technique 

  • Soldering a joint 
  • Stage in soldering
  • Selection and preparation of materials
  • Selection of soldering iron tip
  • Selection of tip shape
  • Selection of solder and flux
  • Soldering stand
  • Inspection of soldering iron
  • Preparation of soldering for soldering 
  • Cleaning the surfaces to be soldered
  • Heating the joint and adding solder
  • Cooling the joint 
  • Cleaning the joint 
  • Inception of soldered joint 
  • Surface colour
  • Surface texture
  • Common soldering defect
  • Temperature defects

Electromagnetic Induction

  • Inductance 
  • Cemf And Lenz’s law
  • Definition of self inductance
  • Henry 
  • Coil inductance
  • Mutual  inductance 
  • Magnitude of induced emf 
  • Factors derterming inductance 
  • Number of tune
  • Spacing between turns of the coil
  • Coefficient of self inductance
  • Energy storage 
  • Type of connection of heating 
  • Series inductors
  • Parallel induction
  • Application of induction for high voltage generation
  • Inductance effect in Dc
  • Opposite to current flow in dc circuit 
  • Effective opposition to current flow in Ac circuit 

Instant start fluorescent lamps

  • State the function of instant start ballast 

Rapid start fluorescent lamp

  • Advantage 
  • Instant start electronic ballets with fluorescent 
  • Compact fluorescent lamps 

Servicing of simple power supplies

  • Introduction
  • Physical and sensory tests
  • Symptom diagnosis
  • Testing and replacing defective components
  • High voltage passive 
  • Low power passive 

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