Fundamentals of Welding Flashcards
What is the primary difference between welding and assembly?
a) Welding creates a temporary joint, while assembly is permanent
b) Welding requires mechanical fasteners, while assembly does not
c) Welding forms a permanent joint, while assembly may allow disassembly
d) Assembly is more expensive than welding
c) Welding forms a permanent joint, while assembly may allow disassembly
Which of the following is NOT a fusion welding process?
a) Arc welding (AW)
b) Resistance welding (RW)
c) Friction welding (FRW)
d) Oxyfuel gas welding (OFW)
c) Friction welding (FRW)
In which process does coalescence occur through the application of pressure alone or with heat below the melting point?
a) Arc welding
b) Solid-state welding
c) Oxyfuel gas welding
d) Autogenous welding
b) Solid-state welding
What type of welding is commonly used in the construction of bridges and buildings?
a) Spot welding
b) Diffusion welding
c) Arc welding
d) Ultrasonic welding
c) Arc welding
What is the primary risk associated with arc welding?
a) Chemical contamination
b) Ultraviolet radiation
c) Water leakage
d) Thermal expansion
b) Ultraviolet radiation
What is the purpose of a filler metal in fusion welding?
a) To increase the thickness of the base metal
b) To act as a heat insulator
c) To provide bulk and added strength to the welded joint
d) To conduct electricity across the joint
c) To provide bulk and added strength to the welded joint
Which type of weld is typically used to fill edges in lap, corner, or tee joints?
a) Groove weld
b) Fillet weld
c) Spot weld
d) Seam weld
b) Fillet weld
Which of the following is a key disadvantage of welding?
a) It requires complex machinery
b) It cannot be performed outside of factories
c) Welded joints are difficult to disassemble
d) It always requires a filler material
c) Welded joints are difficult to disassemble
Which term describes the efficiency of converting power into usable heat at the work surface during welding?
a) Melting efficiency
b) Power density
c) Heat transfer efficiency
d) Heat affected zone (HAZ)
c) Heat transfer efficiency
What is the heat-affected zone (HAZ) in welding?
a) The area where molten metal is deposited
b) The zone that remains unaffected by heat
c) The region that undergoes microstructural changes due to heat but does not melt
d) The zone where electrical current flows
c) The region that undergoes microstructural changes due to heat but does not melt
Which type of welding uses an electric arc to melt metals?
a) Oxyfuel gas welding
b) Ultrasonic welding
c) Arc welding
d) Resistance welding
c) Arc welding
What is the primary purpose of automation in welding?
a) To reduce heat input during the process
b) To enhance safety, productivity, and quality
c) To decrease the weight of welded joints
d) To increase the variety of metals that can be welded
b) To enhance safety, productivity, and quality
Which type of joint involves two parts lying in the same plane and joined at their edges?
a) Lap joint
b) Butt joint
c) Corner joint
d) Tee joint
b) Butt joint
What is a key characteristic of solid-state welding?
a) Filler material is required for all operations
b) Coalescence occurs through the melting of the base metal
c) Welding occurs at temperatures below the melting point of the metals
d) It uses combustible gases to generate heat
c) Welding occurs at temperatures below the melting point of the metals
Which welding process uses resistance to electric current to generate heat for joining parts?
a) Friction welding
b) Resistance welding
c) Arc welding
d) Oxyfuel gas welding
b) Resistance welding
What is the main purpose of surfacing welds?
a) To join two parts together
b) To fill the gap between two plates
c) To deposit filler material onto the surface for increased thickness or protection
d) To reduce the heat-affected zone (HAZ)
c) To deposit filler material onto the surface for increased thickness or protection
What type of joint forms a right angle and is joined at the corner?
a) Lap joint
b) Tee joint
c) Butt joint
d) Corner joint
d) Corner joint
What is the role of a “fitter” in welding operations?
a) To inspect the quality of the welds
b) To assist the welder by arranging and positioning parts before welding
c) To perform automated welding tasks
d) To supervise the use of gases in gas welding
b) To assist the welder by arranging and positioning parts before welding
Which factor can affect melting efficiency during welding?
a) Color of the base metal
b) Thermal conductivity of the metal
c) Thickness of the welding gloves
d) Type of mechanical fastener used
b) Thermal conductivity of the metal
What is the main drawback of high-power density in welding?
a) Inadequate melting of the metals
b) Excessive energy loss to the environment
c) Localized vaporization of the metal
d) Increased assembly time
c) Localized vaporization of the metal
Which of the following joints involves two overlapping parts?
a) Corner joint
b) Lap joint
c) Butt joint
d) Tee joint
b) Lap joint
What is the difference between a spot weld and a seam weld?
a) Spot weld uses filler material, while seam weld does not
b) Spot weld is localized, while seam weld is continuous along a joint
c) Spot weld is stronger than seam weld
d) Seam weld requires a higher temperature than spot weld
b) Spot weld is localized, while seam weld is continuous along a joint