Quiz - Chapter 2 - Opentronix

You have 30 minutes to answer all the questions.

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C2 – Computer-Aided Design

Review: 2D vs 3D, OpenSCAD

1. Which option best describes a drawing in a plane (2D)?

a. It has length, width, and depth.

b. It has width and blue color.

c. It has length and width.

d. It only has length.

2. Which property does a solid (3D object) have that a drawing in a plane (2D) doesn't have?

a. Texture.

b. Color.

c. Depth (or height).

d. Temperature.

3. What is the meaning of CAD?

a. Computer-Aided Domestic.

b. Construction-Aided Dimension.

c. Computer Algorithm Drill.

d. Computer-Aided Design.

4. What is OpenSCAD?

a. A software that enables the user to draw stairs.

b. A special pen that can draw in 3D.

c. Computer program (or software) that allows to create a digital 3D (and 2D) representation of an object.

d. A 3D printer part that prints 3D objects.

5. Is there any advantage in creating a digital representation (with a computer) of an object?

a. The only advantage is to be able to change color of the drawing.

b. There is no advantage.

c. There are plenty advantages: we can create precise models of objects that can be easily saved, modified, shared, and reused later.

d. The only advantage is: we can send the drawing to our friends via email.

6. If we want to draw a cube with OpenSCAD, which word or specific expression do we need to use?

a. cubo ( r =...)

b. cube ( [a, b, c] )

c. sphere ( r =...)

d. cylinder ( h =..., r =...)

7. What happens to the geometric shape that is written inside the expression translate ( [x, y, z] ) {...}?
Example: translate ( [x, y, z] ) { cube ( [ a, b, c] ) }.

a. It moves in the direction of the vector specified by the expression [x, y, z].

b. It rotates around its own axis.

c. Increases size.

d. It changes its color.

8. If you want to combine two 2D shapes, which OpenSCAD operator do you need to use ?

a. intersection ()

b. hull ()

c. difference ()

d. union ()

9. Which OpenSCAD expression do you need to use to remove a solid (its volume) from another solid?
Example: to remove the volume of a small cube from the volume of a sphere.

a. hull ()

b. intersection ()

c. difference ()

d. union ()

10. Imagine that you want to move a cylinder as follows:
15 mm in the Y-axis direction, and 20 mm in Z-axis direction.
Which two numbers do you need to choose to correctly complete the following expression:
translate ( [0, _, _] ) cylinder ( h = 25, r = 5 );

a. 20, 15

b. 5, 25

c. 15, 20

d. 20, 0

Thank you for your enthusiasm!

👍

3D Printing for everyone

Quiz – Chapter 2