Most of the oxyacetylene welding is done with

A Neutral flame
B Oxidizing flame
C Carburising flame
D All of these

Correct Answer: Neutral flame

The neutral flame is the flame in which the amount of oxygen is precisely enough for burning, and neither oxidation nor reduction occurs. A flame with a good balance of oxygen is clear blue. The reducing and neutral flames are useful in soldering and annealing.
The neutral flame has a one-to-one ratio of acetylene and oxygen. It obtains additional oxygen from the air and provides complete combustion. It is generally preferred for welding.
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Related Questions

In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
A 3500°C
B 3200°C
C 2900°C
D 2550°C
The oxyacetylene gas used in gas welding produce a flame temperature of
A 1800°C
B 2100°C
C 2400°C
D 3200°C
Oxyacetylene reducing flame is used while carrying out welding on
A Alloy steel
B Grey cast iron
C Mild steel
D High carbon steel
In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.
A Same
B Less
C More
D None of these
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
A Same
B Less
C More
D None of these
If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?
A Forehand welding
B Flux cored ARC welding
C Electro slag welding
D Pulsed spray welding
In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as
A Fusion
B Reverse polarity
C Forward welding
D Direct polarity
In which type of welding a gas shield, a consumable electrode is used and the welding can be done in all positions.
A ARC welding
B Submerged ARC welding
C TIG welding
D MIG welding
In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position.
A Globular transfer
B Spray transfer
C GMAW practice
D Dip transfer
In TIG arc welding, the welding zone is shielded by an atmosphere of
A Helium gas
B Argon gas
C Either (A) or (B)
D None of these

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