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Which of the following statement(s) is/are true regarding butt welding? 1. Flash butt welding is a combination of resistance, arc and pressure welding 2. Upset butt welding is used for welding rods 3. Percussion Welding is a self timing spot welding method 4. Aluminium alloys are flash welded
Which two of the following joining processes are autogenous? i. Diffusion welding ii. Electroslag welding iii. Tungsten inert gas welding iv. Friction welding
Which of the following welding is NOT a fusion welding process?
What type of fusion welding process is used for welding sheet metals of all engineering metals (except Cu, Ag) in automobile and air craft industries, pipe and tubing production?
Which among the following is a property of fusion welding not of solid state welding?
In which of the following welding only fusion welding takes place?
A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is
When welding of two metal parts are carried out by heating the parts at joint up to plastic condition and then joined together by applying external mechanical pressure it is named as Fusion welding.
Consider the following statements: In metal arc welding 1. Utilizes a consumable electrode 2. A welding torch used is connected to acetylene gas supply 3. The electrode and work-piece are connected to the welding power supply. Which of these statements are correct?
Consider the following statements in respect of the oxidizing flame due to excess oxygen in welding: 1) AT high temperature, it combines with many metals to form hard and brittle oxides. 2) It causes the weld bead and the surrounding area to have a scummy appearance 3) It has good welding effect in welding of copper-base metal. Which of the above statements are correct?