In brazing process, the liquid metal fills the gap by which one of the following means?
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Metallurgical Engineering · all questionsWelding Metallurgy
Welding Metallurgy
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Match the following:
| Process | Characteristics |
| P. Ultarasonic welding | 1. Most commonly used process |
| Q. Plasma arc welding | 2. Use of explosives |
| R. Thermit welding | 3. Highest temperature |
| S. Shielded metal arc welding | 4. Solid state process |
| 5. Use of chemical energy |
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Which of the following is not a solid state metal joining technique?
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Match the following:
| Group 1 | Group 2 |
| P. Thermit welding | 1. Globular metal transfer |
| Q. Arc welding | 2. Mechanical energy converted to heat energy |
| R. Welding in solid state | 3. Exothermic process |
| S. Friction welding | 4. Diffusion bonding |
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Which one of the following carbon equivalent in steel is considered good for weldability?
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Match the welding processes in Group 1 with the principal mechanism in Group 2.
| Group 1 | Group 2 |
| P. Seam welding | 1. Ionisation and plasma |
| Q. Explosive welding | 2. Exothermic reaction |
| R. Gas welding | 3. Interfacial deformation |
| S. TIG welding | 4. Interfacial resistance heating |
| 5. Interfacial diffusion of atoms |
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Brazing fillermetal used for joining steel plates
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Melting rate of electrodes in manual metal arc welding (MMAW) process is mainly governed by the
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Thermit welding uses the following energy sources.
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The grain size in the heat affected zone (HAZ) of a weld is maximum
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Flux in welding process acts as
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In multipass are welds shot peening is done after each pass to
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The titanium alloys are welded using the following process.
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Arc welding is done using current, voltage and welding speed of 200 A, 20 V and 0.01 m/s, respectively. The heat input in KJ per unit length is
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The order of decreasing weldability among the following steel is
P. Fe-0.6% C
Q. Fe 0.4% C
R. HSLA
P. Fe-0.6% C
Q. Fe 0.4% C
R. HSLA
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For better resistance welding, the metal must have
P. high electrical resistivity and low melting point
Q. high thermal conductivity
R. high electrical resistivity and high melting point
S. low thermal conductivity
P. high electrical resistivity and low melting point
Q. high thermal conductivity
R. high electrical resistivity and high melting point
S. low thermal conductivity
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Two sheets of iron and copper of equal thickness are welded together into one sheet. Iron is in contact with water at 298 K and copper is in contact with steam at 373 K. At steady state, the temperature profile within the sheet will be
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