G8-U4

G8-U4

Activity 19

Multiple Choice

3D printing is a subtractive manufacturing technique.

• true

• false

Multiple Choice

One of the main advantages of additive manufacturing is that objects can be made easily.

• true

• false

Multiple Choice

When you have on-demand manufacturing, you build an object quickly at the time you need it.

• true

• false

Multiple Choice

With 3D printing you cannot change the design each time, until you have exactly what you want and what works best.

• false

• true

Multiple Choice

A printer used by a dentist is like a printer used by a jewellery designer.

• true

• false

Multiple Choice

Filament is the material (usually plastic) that will be used to produce the printed object.

• true

• false

Multiple Choice

A 3D printed building in Dubai is the world’s first 3D-printed building

• false

• true

Activity 20

Multiple Choice

To avoid warping you can apply a mild glue to the build

platform before printing begins

• TRUE

• FALSE

Multiple Choice

3D printers build an object layer-by-layer from the bottom to the top until the entire object is complete.

• false

• true

Multiple Choice

The 3D printing software does not let you vary the density of the infill

• false

• true

Multiple Choice

Unsupported overhangs will fail to print correctly as the plastic layers, sag and fall due to non-support.

• false

• true

Multiple Choice

For FDM printing, any gradual slope that is 45° or more

does not require support and will print fine

• TRUE

• FALSE

Multiple Choice

If you are making a hole with 10mm diameter for a rod to

fit in, then the rod should be sized to 12mm to ensure it

will fit well when printing

• TRUE

• FALSE