FDM 3D printing

Test created at: 2020-05-10 by Igor; number of questions: 26.
If you are not ready, you could first read the literature (https://www.simplify3d.com/support/materials-guide/, new window) and do the test later.

Average score for this test is: 76.4% calculated only from first attempts (71 pcs.), last one was: 2023-04-03.

Q1: FDM is abbreviation for..

Filament Design Manufacturing
Fused Deposition Modeling
Fractional Digital Molding
Good answeres: 1

Q2: What is the most common nozzle diameter?

0.2 mm
0.4 mm
0.6 mm
0.8 mm
1 mm
Good answeres: 1

Q3: What is the minimum number of stepper motors for 3D printer

2
3
4
5
Good answeres: 1

Q4: What is the common filament diameter?

1 mm
1.75 mm
2.5 mm
4 mm
Good answeres: 1

Q5: What material is the easiest for 3D printing:

ABS
ASA
Nylon
PETG
PLA
Good answeres: 1

Q6: What material may have food safe certificate?

ABS
ASA
PETG
PLA
Good answeres: 2

Q7: Which filament has toxic evaporations during 3D printing?

ABS
Nylon
PP (polypropilene)
PETG
PLA
Good answeres: 1

Q8: What is the name of the effect from image?

Image author: MyTechFun Youtube channel

Bridging
Overhang
Warping
Good answeres: 1

Q9: Maximal overhang angle is angle that can be printed without:

Image author: MyTechFun YT channel: About overhang

Brim
Cooling
Supports
Warping
Good answeres: 1

Q10: Overhang angle is angle between

horizontal- and 3D printed surface
vertical- and 3D printed surface
first layer and 3D printed surface
Good answeres: 1

Q11: What effects can increase maximal overhang angle?

additional cooling
increasing bed temperature
reducing printing temperature
reducing layer height
using steel nozzle
Good answeres: 3

Q12: From the image, which objects needs a support?

Image author: Igor 3D printing letter with PVA supports

Y
H
T
O
K
V
Good answeres: 2

Q13: From the list what material has biggest warping potential

ABS
ASA
PETG
PLA
Good answeres: 1

Q14: How can you reduce warping effect?

Increase printing speed
Increase printing temperature
Place 3D printer next to the open window
Using Brim
With enclosure for 3D printer
Good answeres: 2

Q15: If 3D printing time for some object is 1h with 0.4mm nozzle, what would be the printing time with 0.6mm nozzle?

0.5 hours
0.67 hours
1.5 hours
3 hours
Good answeres: 1

Q16: If printing time with 0.4mm nozzle is 1h what is the printing time with 0.25mm nozzle?

0.5 hours
1.6 hours
3.5 hours
Good answeres: 1

Q17: Reducing layer height has significant effect on

near horizontal surface quality
near vertical surface quality
used filament material
3D printing time
Good answeres: 2

Q18: Select popular 3D printing companies:

Bosch
Creality
Prusa
Samsung
Ultimaker
Good answeres: 3

Q19: Select the quietest stepper motor driver:

A4988
DRV8825
TMC2208
Good answeres: 1

Q20: How can you increase layer adhesion?

Increase printing speed
Increase printing temperature
Reducing printing speed
Reducing printing temperature
Good answeres: 1

Q21: What is the strongest filament from the list?

ABS
Metal filled
PETG
Polycarbonate
Good answeres: 1

Q22: Which filaments needs to be protected from absorbing moisture from air?

ABS
PETG
Nylon
PLA
Good answeres: 2

Q23: Which type of filaments requires hardened steel nozzle (not brass)?

Carbon fiber
Glow in dark
Metal Filled
Nylon
Polypropylene (PP)
PVA
Good answeres: 3

Q24: What material will dissolve in water?

ABS
PE (polyethylene)
PETG
PVA
Good answeres: 1

Q25: What is the purpose of Slicer software?

2D design software
3D design software
Generate STL file
Process STL file into Gcode
Good answeres: 1

Q26: How to make 3D printed object food safe?

Image author: MyTechFun YT channel: About food safe 3D printing

Coat it with epoxy resin
Clean the surface after every usage
Just use food safe filaments
By printing on high temperatures and smaller layer height
Use antibacterial filaments
Good answeres: 2

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