Title: Summary Part Secondary Manufacturing

Choose the correct statement.

- Machining processes are often necessary to impart the desired dimensional accuracy, geometric features and surface finish of parts produced by other processes. Additionally, machining is often employed for complex shapes that cannot be produced economically using other shaping techniques. (correct)
- Machining processes are solely used to impart the desired dimensional accuracy, geometric features and surface finish of parts produced by other processes.

- Some variables that determine the outcome of the cutting process are tool shape, the depth of the cut, and the cutting speed. Cutting tools are characterized by their rake and clearance angle. (correct)
- Some variables that determine the outcome of the cutting process are tool shape, the total cutting time, and the cutting speed. Cutting tools are characterized by their rake and flank angle.

- Temperature rise in machining is an important consideration, since it can have adverse effects on tool life and the surface integrity of the machined part. (correct)
- Temperature rise in machining is an important feature of machining, since it softens the workpiece material and hence facilitates machining – hence, the higher the temperature at the tool, the better the outcome.

- Machinability generally is defined in terms of surface finish, tool life, force and power requirements, and chip control. The machinability of materials depends on their composition, properties and microstructure. In general, metals, polymers and ceramics can be machined with the propert tools and process conditions. (correct)
- Machinability generally is defined in terms of surface finish, tool life, force and power requirements, and chip control. The machinability of materials depends on their composition, properties and microstructure.  In general, only metals can be machined.

- Chemical methods and electrocal methods of machining are suitable particularly for hard materials. They do not produce forces, significant temperatures or residual stresses. However, they often require electrical conductivity of the workpiece. (correct)
- Chemical methods and electrocal methods of machining are suitable particularly for hard materials. They do not produce forces, significant temperatures or residual stresses. They can be used to machine all materials.

- Adhesive-bonding is one of the most versatile joining processes. It has many favorable characteristics, but its most important advantage is its ability to join dissimilar materials. However, the type of adhesive and the adhesive procedure must be adjusted to the materials to be joined. (correct)
- Adhesive-bonding is one of the most versatile joining processes. It has many favorable characteristics, but its most important advantage is its ability to join dissimilar materials. Especially convenient is the fact that most adhesives work for most material combinations to be joined.

- The metallurgy of the welded joint is an imporant aspect of all welding processes, because it determines the strength, toughness, and quality of the joint and hence the final product. (correct)
- The metallurgy of the welded joint is a subordinate factor in welding, because the strength and toughness of the final part is determined mostly by the material that is joined.

- Discontinuities, such as porosity, inclusions, incomplete welds, and cracks, can develop in the weld zone. The same defects can be observed in the casting process. Additionally, residual stresses and relieving them are important considerations. (correct)
- Discontinuities, such as porosity, inclusions, incomplete welds, and cracks, can develop in the weld zone. The same defects can be observed in the casting process. As metals are good heat conductors, residual stresses are less of a concern.

- Finishing involves treatments applied to the surface of a component or assembly. This for example includes polishing, electroplating, or surface hardening. (correct)
- Finishing involves final treatments applied to the bulk of a component or assembly. This for example includes heat treatment of the whole part.

- Surface treatments are primarily used to impart specific mechanical, chemical, and physical properties, such as appearance, and corrosion, friction, wear and fatigue resistance. (correct)
- Surface treatments are primarily used to improve the visual appearance of parts, for example by colorful coating or polishing to produce a shiny surface.

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