ADDITIVE MANUFACTURING CERTIFICATE EXAM ‘PRETEST’ 1.The following software is used to manipulate (edit, section, repair, re-scale, etc.) STL files, EXCEPT:

A. Magics RP B. Solid View C. SolidWorks D. nettfabb Studio

2. During the post processing of stereolithography parts, the following solvents are used, EXCEPT:

A. Polyflush B. TPM (tripropylene glycol monomethyl ether) C. Acetone D. Alcohol

3. A critical measure of suitability of certain polymers to replace metals in structural applications is:

A. Surface Finish B. Material cost C. Material availability D. Strength-to-density ratio

4. The total cost of ownership (TCO) for an AM system consists of which of the following?

A. Acquisition and materials B. Supply chain maintenance costs C. Materials research and development expenditures D. Acquisition, operating, and personnel costs

5. __________ is an AM process in which a pre-deposited photopolymer in a vat is selectively cured by light-activated cross linking of adjoining polymer.

A. Vat photopolymerization B. Sheet lamination C. Material extrusion D. Direct energy deposition

6. The AM processes listed below are currently capable of making titanium-alloy parts, EXCEPT:

A. Arcam Electron Beam Melting B. Concept Laser – Laser Cusing C. ExOne ProMetal D. MCP-HEK Selective Laser Melting (SLM)

7. The following companies manufacture systems that produce cores and molds for sand casting, EXCEPT:

A. ExOne B. Arcam C. EOS Gmbh D. Voxeljet

8. A customer has designed a part that needs to be printed with color. The following file output formats can be used, EXCEPT:

A. PLY B. VRML C. OBJ D. STL

9. An MRI or CT scanner produces files in the following formats, EXCEPT:

A. JPEG B. DICOM C. TIFF D. IGES

10. Materialise’s Magics Software has automatic tools to repair all of the following defects in STL files EXCEPT?

A. Missing assembly components B. Inverted normals C. Overlapping triangles D. Noise shells

11. The following cost drivers are major considerations when using most AM processes, EXCEPT:

A. Machine cost B. Utility cost C. Raw material cost D. Labor cost

12. The following are common AM issues for parts used in master patterns, EXCEPT:

A. Scale factor B. Relative hole location C. Paint layer thickness D. Layer lines

13. A customer needs a single complex sheet metal part. If cost and lead time factor heavily in the final decision, which technology best fits the customer’s need?

A. Produce multiple AM tools to form the part B. Produce a QuickCast™ part C. Produce an AM part and clad it D. Produce a rescaled AM part

14. Which FDM material is FST (Flame, Smoke, and toxicity) compliant: A. PPSF B. ABSi C. ULTEM 9085 D. PC/ABS

15. The following machines use a heated platform, EXCEPT: A. Objet Eden 500V B. EOS M280 C. Arcam A2 D. 3D Systems sPro 60

16. Which of the following systems produces parts by depositing a clear or colored liquid glue on a bed of starch or plaster-based powdered materials?

A. 3D Systems ProJet 660Pro B. Stratasys Fortus 400mc C. EOS P700 D. Makerbot Thing-o-Matic

17. The following are major cost factors in AM, EXCEPT:

A. Build height B. Build volume C. Part feature complexity D. Part quantity

18. The following are some of the advantages of producing metal parts using powder bed fusion compared to binder jetting methods, EXCEPT:

A. Density B. Cost C. Elongation D. Accuracy

19. If you are not sure of the AM process to be used, the minimum feature size constraint you should probably target is:

A. 0.050" B. 0.100" C. 0.004" D. 0.010"

20. When inspecting a part, it is noted that all of the dimensions in the z-axis are too long. This phenomenon in additive manufacturing can be corrected by using what is referred to as “Z Compensation” or “Z-Comp.” What is Z-Comp correcting?

A. Final layer inaccuracies B. Initial layer inaccuracies C. Laser/Scanner offsets D. Dimensional shrink of the material

1 – C; 2 – C; 3 – D; 4 – D; 5 – A; 6 –C; 7 – B; 8 – D; 9 – D; 10 – A; 11 – B; 12 – B; 13 – C; 14 – C; 15 – A; 16 – A; 17 – C; 18 – B; 19 – A; 20 - B