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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
Steels with high carbon equivalent have poor weldability, because in these steels during welding
Steels with high carbon equivalent have poor weldability because in these steels during welding
Which two of the following joining processes are autogenous? i. Diffusion welding ii. Electroslag welding iii. Tungsten inert gas welding iv. Friction welding
Friction welding cannot be used for welding stainless steel to carbon steels.
What does the term ‘carbon count’ means? 1. A measure of the amount of carbon dioxide you produce through your lifestyle every day. 2. A measure of the amount of carbon present on Earth. 3. A measure of the amount of carbon and carbon dioxide on Earth. Select the correct answer using the code given below.
The power source in a particular welding setup generates 4000 W that can be transferred to the work surface with a heat transfer factor = 0.9. The metal to be welded is low carbon steel, whose melting temperature, is 1800 K. The melting factor in the operation is 0.6. A continuous fillet weld is to be made with a cross-sectional area = 20 mm2. Determine the travel speed at which the welding operation can be accomplished? (K = 3.33 *10-6)
High alloys steels are preheated up to what temperature?
Low carbon steels are those in which carbon percentage is around
The amount of carbon present in low carbon steels is ___________