Quiz - Chapter 2 - Opentronix

You have 30 minutes to answer all the questions.

Thank you for your engagement!

C2 – Computer-Aided Design

Review: 2D vs 3D, OpenSCAD

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

a. It only has length.

b. It has length, width, and depth.

c. It has width and blue color.

d. It has length and width.

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

a. Depth (or height).

b. Texture.

c. Color.

d. Temperature.

3. What is the meaning of CAD?

a. Computer-Aided Design.

b. Construction-Aided Dimension.

c. Computer-Aided Domestic.

d. Computer Algorithm Drill.

4. What is OpenSCAD?

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

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

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

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

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

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

d. There is no advantage.

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

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

b. cubo ( r =...)

c. sphere ( r =...)

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

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. Increases size.

b. It rotates around its own axis.

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

d. It changes its color.

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

a. difference ()

b. union ()

c. hull ()

d. intersection ()

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. difference ()

b. hull ()

c. union ()

d. intersection ()

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. 20, 0

c. 15, 20

d. 5, 25

Thank you for your enthusiasm!

👍

3D Printing for everyone

Quiz – Chapter 2