Additive Manufacturing Technician Level
II Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following additive manufacturing processes uses a laser to fuse
powdered material layer by layer?
a) Fused Deposition Modeling (FDM)
b) Selective Laser Sintering (SLS)
c) Material Jetting
d) Laminated Object Manufacturing
Answer: b) Selective Laser SLS
*Rationale: SLS uses a laser to sinter powdered material, building objects layer by
layer. FDM uses filament extrusion, material jetting uses droplets, and laminated
object manufacturing uses sheets of material. *
2. What is the primary material form used in Fused Deposition Modeling (FDM)?
a) Powder
b) Resin
c) Filament
d) Sheet
Answer: c) Filament
*Rationale: FDM uses thermoplastic filament that is melted and extruded through
a nozzle to build parts layer by layer. *
,3. In stereolithography (SLA), the curing of the material occurs due to exposure to:
a) Heat
b) Electron beam
c) UV light
d) Pressure
Answer: c) UV light
*Rationale: UV light initiates polymerization in the photosensitive resin, causing it
to cure and solidify layer by layer. *
4. Which of the following post-processing steps is most common for metal 3D
printed parts?
a) Sanding only
b) Heat treatment
c) Painting
d) Electroplating
Answer: b) Heat treatment
*Rationale: Metal parts often require heat treatment to relieve residual stresses,
improve mechanical properties, and achieve desired microstructures. *
5. What is a common defect in 3D printing characterized by incomplete layer
bonding?
a) Warping
b) Stringing
c) Delamination
d) Over-extrusion
Answer: c) Delamination
,*Rationale: Delamination occurs when layers do not properly adhere to each other,
resulting in separation between layers and compromised part integrity. *
6. Which parameter has the most influence on FDM print quality?
a) Build plate color
b) Nozzle temperature
c) Printer weight
d) Ambient lighting
Answer: b) Nozzle temperature
*Rationale: The nozzle temperature directly affects material flow, layer adhesion,
and overall print quality. Improper temperature can cause under-extrusion, over-
extrusion, or poor interlayer bonding. *
7. In binder jetting, the binder is typically applied to:
a) Liquid resin
b) Powder bed
c) Filament
d) Sheet material
Answer: b) Powder bed
*Rationale: In binder jetting, a liquid binding agent is selectively deposited onto a
powder bed to join powder particles together, forming each layer of the part. *
8. What is "stair-stepping" in 3D printing?
a) A method of support generation
b) Layered appearance on sloped surfaces
c) Printer calibration error
d) Excess material extrusion
, Answer: b) Layered appearance on sloped surfaces
*Rationale: Stair-stepping occurs because layers are stacked vertically, creating
visible steps on sloped or curved surfaces. This is a inherent characteristic of layer-
by-layer fabrication. *
9. Which software function is responsible for converting a CAD model into printer
instructions?
a) Modeling
b) Rendering
c) Slicing
d) Scanning
Answer: c) Slicing
*Rationale: Slicing software divides the 3D model into horizontal layers and
generates the toolpath and G-code instructions required for the printer to build the
part. *
10. Which of the following is a primary safety concern when working with SLA
printers?
a) Moving parts
b) UV resin exposure
c) Noise
d) Filament storage
Answer: b) UV resin exposure
*Rationale: Liquid photopolymer resin can be toxic and harmful to skin, eyes, and
respiratory system. Proper personal protective equipment and ventilation are
essential when handling SLA materials. *
II Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Which of the following additive manufacturing processes uses a laser to fuse
powdered material layer by layer?
a) Fused Deposition Modeling (FDM)
b) Selective Laser Sintering (SLS)
c) Material Jetting
d) Laminated Object Manufacturing
Answer: b) Selective Laser SLS
*Rationale: SLS uses a laser to sinter powdered material, building objects layer by
layer. FDM uses filament extrusion, material jetting uses droplets, and laminated
object manufacturing uses sheets of material. *
2. What is the primary material form used in Fused Deposition Modeling (FDM)?
a) Powder
b) Resin
c) Filament
d) Sheet
Answer: c) Filament
*Rationale: FDM uses thermoplastic filament that is melted and extruded through
a nozzle to build parts layer by layer. *
,3. In stereolithography (SLA), the curing of the material occurs due to exposure to:
a) Heat
b) Electron beam
c) UV light
d) Pressure
Answer: c) UV light
*Rationale: UV light initiates polymerization in the photosensitive resin, causing it
to cure and solidify layer by layer. *
4. Which of the following post-processing steps is most common for metal 3D
printed parts?
a) Sanding only
b) Heat treatment
c) Painting
d) Electroplating
Answer: b) Heat treatment
*Rationale: Metal parts often require heat treatment to relieve residual stresses,
improve mechanical properties, and achieve desired microstructures. *
5. What is a common defect in 3D printing characterized by incomplete layer
bonding?
a) Warping
b) Stringing
c) Delamination
d) Over-extrusion
Answer: c) Delamination
,*Rationale: Delamination occurs when layers do not properly adhere to each other,
resulting in separation between layers and compromised part integrity. *
6. Which parameter has the most influence on FDM print quality?
a) Build plate color
b) Nozzle temperature
c) Printer weight
d) Ambient lighting
Answer: b) Nozzle temperature
*Rationale: The nozzle temperature directly affects material flow, layer adhesion,
and overall print quality. Improper temperature can cause under-extrusion, over-
extrusion, or poor interlayer bonding. *
7. In binder jetting, the binder is typically applied to:
a) Liquid resin
b) Powder bed
c) Filament
d) Sheet material
Answer: b) Powder bed
*Rationale: In binder jetting, a liquid binding agent is selectively deposited onto a
powder bed to join powder particles together, forming each layer of the part. *
8. What is "stair-stepping" in 3D printing?
a) A method of support generation
b) Layered appearance on sloped surfaces
c) Printer calibration error
d) Excess material extrusion
, Answer: b) Layered appearance on sloped surfaces
*Rationale: Stair-stepping occurs because layers are stacked vertically, creating
visible steps on sloped or curved surfaces. This is a inherent characteristic of layer-
by-layer fabrication. *
9. Which software function is responsible for converting a CAD model into printer
instructions?
a) Modeling
b) Rendering
c) Slicing
d) Scanning
Answer: c) Slicing
*Rationale: Slicing software divides the 3D model into horizontal layers and
generates the toolpath and G-code instructions required for the printer to build the
part. *
10. Which of the following is a primary safety concern when working with SLA
printers?
a) Moving parts
b) UV resin exposure
c) Noise
d) Filament storage
Answer: b) UV resin exposure
*Rationale: Liquid photopolymer resin can be toxic and harmful to skin, eyes, and
respiratory system. Proper personal protective equipment and ventilation are
essential when handling SLA materials. *
