Here are the questions from the five-minute tests that have been given so far during this semester.

1. 1. What is manufacturing?
   2. What does "digital" mean?
   3. What do you think you might get out of a class called Digital Manufacturing?

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2. 1. Give an example of an ancient additive fabrication process.
   2. What do you find to be the most interesting natural process of making things? Why?

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3. 1. What is a voxel?
   2. For communicating digital designs to fabricators, there is a primary data format used for subtractive machines and a different one for additive machines. Name one of these formats and say which type of machine it is for.

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4. 1. If you wanted to record the shape of your ear, including your ear lobe and the ear canal up to the eardrum, which level of digitization would you use, flat relief, spatial relief, surface detail, or spatial detail?
   2. Which type of sensor works like a blind man feeling his way with a cane: touch probe, trigger, point range, line range, or computer tomography?

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5. 1. Of the following types of bonding:
           Metallic, ionic, van der Walls, covalent
      Which type is present in:
           Plastic, copper, table salt?
   2. Of the following types of material properties:
           Mechanical, thermal, chemical, electromagnetic
      Which type of property is:
           Solubility, strength, color, melting point?

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6. 1. Name or describe two ways in which modern CNC tools improve on the process of subtractive fabrication.

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7. 1. In selective curing, state one advantage of using a laser versus a masked lamp as the energy source.
   2. In selective curing, state one advantage of using a masked lamp versus a laser as the energy source.
   3. In selective curing, state one advantage of using a resin of higher viscosity.

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8. 1. The stages of polymer growth are initiation, _______________________, and termination.
   2. What is the phenomenon that makes polymers stronger and prevents them from melting?

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9. Please answer any two of the following three questions:
   1. What is molecular manufacturing?
   2. What is mechanosynthesis?
   3. Name three potential applications of molecular manufacturing.

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10. 1. Name or describe two important technology advances that have brought the world closer to having molecular manufacturing.

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11. 1. How can you tell if something made in a fabricator is a prototype or a product?
    2. Can it be both at the same time? If so, give an example.
    3. Can it be neither? If so, give an example.

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12. 1. What is one digital fabrication process that would be feasible for use on the Moon?
    2. How would its use be different there than on Earth?