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 Gas Welding Operator

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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Steel rule

  • Scriber
  • Punches
  • Centre punch
  • Prick punch
  • Dot punch
  • Hammer
  • Major parts of a hummer
  • Face
  • Peen or pein
  • Cheek
  • Eye hole
  • Specification
  • Before using a hammer
  • Bench vice
  • Chisel
  • Parts of a chisel
  • Clamps
  • Types of clamps used
  • Uses of different types of clamp
  • Hacksaw frame and blade
  • Types of hacksaw frames
  • Solid frame
  • Adjustable frame (flat type)
  • Adjustable frame (tubular type)
  • Hacksaw blades
  • Types of hacksaw  blades
  • Flexible blades
  • Pitch of the blade setting of the saw
  • Staggered set
  • Parts of a file
  • Tip or point
  • Edge
  • Heel
  • Shoulder
  • Tang
  • Handle
  • Ferrule
  • Materials
  • Cleaning of files
  • Method of removing pinning
  • Try square
  • Uses
  • Wing compass
  • Snips
  • Mallet
  • Ordinary
  • Punches used for producing holes

High pressure oxy – acetylene welding                                                                          

  • Oxygen gas cylinders
  • Dissolved acetylene cylinders
  • Oxygen pressure regulator
  • Acetylene regulator
  • Rubber hose-pipes and connections
  • Safety precautions in handing oxy-acetylene gas welding plants
  • General safety precautions
  • Gas welding hand tools
  • Double ended spanner
  • Cylinder key
  • Nozzle or tip cleaner
  • Cleaning the  tip
  • Tip cleaner
  • Chipping hammer
  • Carbon steel wire brush
  • Tongs
  • Types of oxy – acetylene flames
  • Neutral flame
  • Uses
  • Oxidizing flame
  • Uses
  • Carburizing flame
  • Filler rods for gas welding
  • Filler rod and its necessity
  • Filler rods used in gas welding
  • Definition of filler rod
  • Types of filler rods
  • Care and maintenance
  • Distortion in gas welding
  • Definition
  • Longitudinal distortion
  • Angular distortion

Weld defects – causes and remedies

  • Weld symbol and welding symbol – description and uses
  • Arrow
  • Root opening and groove angle
  • Contour and finish symbols
  • Welding
  • Dimensions and other details
  • Importance of welding in industry
  • Advantages of welding over other methods of joining
  • Metals
  • Advantages of welding
  • Power sources of TIG welding – types, application – care and maintenance
  • Power sources for GTAW
  • Types of power sources
  • Alternating current transformers
  • Direct current rectifies
  • High frequency unit  and DC suppressor unit
  • High frequency unit (HF unit)
  • Care and maintenance of HF unit
  • DC suppressor
  • Suppression of the D.C component in the a.c. arc
  • Care and maintenance of DC suppressor
  • Properties and uses of Argon and helium gas -  Ceramic shield
  • Shielding gases
  • Properties of argon and helium gas
  • Gases for TIG welding of aluminium Argon gas
  • Argon
  • Low gas volume
  • Vertical and overhead welding
  • Automatic welding
  • Welding dissimilar metals
  • Helium
  • Small heat affected zone
  • His gas volume
  • Thick work mental
  • Automatic welding
  • Aluminium bronze
  • Brass
  • Cobalt base alloys
  • Cupro-Nickel
  • Deoxidized copper
  •  Low carbon steel
  • Magnesium alloys
  • Molybdenum 0.5 Ti alloy
  • Monel
  • Nickel alloys
  • Welder
  • PH stainless steel
  • Silicon bronze
  • Silicon steels
  • Titanium alloys
  • Ceramic shields/nozzles
  • Gas lens
“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: Welding, Welding Operator, Gas Welding