29 Questions
What causes a weld pool to become elongated?
Welding speed increases and heat input decreases
Which statement about cast iron is correct?
Cast iron family normally contains carbon in the range of 2-4%
Which factor does NOT affect the heat input of gas tungsten arc welding process?
Electrode diameter
What is the melting rate of consumable in gas metal arc welding proportional to?
Directly proportional to stick out length
In friction stir welding, what relationship exists between the hardness of the tool and the base metal?
Hardness of the tool is always higher than the base metal
Which material is a plasma arc welding torch's point nozzle generally made of?
Ceramic
When joining two stainless steel foils of 0.2 mm, which welding process is best suited?
TIG welding
How does pressure affect the resistance at the point of contact in a weld joint?
At high pressure, resistance increases
Which type of cast iron is generally considered to be unweldable?
White cast iron
In which case of joining processes does joining take place at the molecular level?
Permanent Joining
How is welding efficiency defined?
Energy transferred to the workpiece / Energy generated by a heat source
What is the purpose of applying preheat prior to welding?
Slower cooling rate
In the solidification of weld metal, what is the role of filler metal that is entirely different from the base metal?
Different nucleation than base metal
What is the source of energy in the Explosion welding process?
Mechanical energy
When increasing the diameter of the SAW electrode while keeping the current and arc length constant, what happens to the width of the weld zone and weld penetration?
Width of the weld zone increases and Weld penetration decreases
In which welding process is brass typically used as a filler material?
Brazing
What type of mechanical vibrations are utilized in Ultrasonic welding?
High frequency and low amplitudes
What type of welding position is characterized by having the components to be joined in a vertical position and the orientation of the weld being horizontal?
Flat welding
Which set of properties is required for a metal to be joined by the solid-state welding process like FSW?
High ductility and low yield strength
In resistance welding, where is the maximum heat generated?
Interface between the two plates being joined
Penetration in fusion welding is defined as the ratio of which two dimensions?
Depth of the weld to its width
Which one of these welding processes does not belong to the group?
Carbon arc welding
Which welding process uses two inert gases simultaneously?
Tungsten inert gas welding
Which welding technique is most suitable for joining thick sections?
Electroslag welding
Which welding process results in the minimum amount of oxygen and nitrogen in the weld metal?
Submerged arc welding (SAW)
In which welding technique is tungsten used as the filler material?
Tungsten inert gas welding
Which joining process does not involve melting of the two surfaces being joined?
Adhesive bonding
What is the time during which force acts at the point of welding after the last impulse of welding current ceases known as in resistance welding?
Hold time
Which joint configuration is most suitable for plasma arc welding?
Butt joint
Test your knowledge on topics related to welding preheat application and solidification of weld metal. Questions cover aspects like micro level plastic deformation, faying surfaces, joining pipes, and the effects of preheat on cooling rate during welding.
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