What is the color of an oxygen gas cylinder?
Black
Explanation:
In gas welding Heat source is the flame produced by the combustion of fuel gas and oxygen.
Acetylene (C 2H 2) is the principal fuel gas employed in this welding.
Gas cylinders are called by the name of the gas they are holding.
Name of the gas cylinder | Color coding |
Oxygen | Black |
Acetylene | Maroon |
Coal | Red (with name coal gas) |
Hydrogen | Red |
Nitrogen | Grey (with black neck) |
Air | Grey |
Propane | Red (with a larger diameter and name propane) |
Argon | Blue |
Carbon Dioxide | Black (with white neck) |
Which of the following equipment is used in arc welding?
The electrodes are manufactured in two standard lengths namely:
The simplest type of a seam is a ___________.
The colour code used for hose pipe for oxygen line is _______
What is the colour of Argon cylinder?

Which type of welding is indicated with this symbol?
Gas welding is also known as:
The inner core of the flame in gas welding has _______ temperature
What combination and proportion of gases will be used to set a neutral flame in gas welding?
A process of joining similar metals by application of heat with or without application of pressure and addition of filter material is called ______
The flame which contains excess oxygen than theoretical required:
In which of the following welding techniques is heat primarily generated by a highly concentrated beam of coherent light?
In gas welding, the inclination of the blow pipe with respect to the plate in Leftward welding is-
Which one among the following welding processes uses non-consumable electrode?
Submerged arc welding, an automatic welding process uses AC current up to