McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
Chapters
| 301. |
Which of the following is used as base material in Electron Beam Melting (EBM) process? |
| A. | Titanium alloys |
| B. | Photopolymer |
| C. | Various materials |
| D. | Paper |
| Answer» A. Titanium alloys | |
| 302. |
Which of the following is used as base material in Selective laser sintering (SLS)? |
| A. | Photopolymer |
| B. | Thermoplastics, Metal powders |
| C. | Titanium alloys |
| D. | Various materials |
| Answer» B. Thermoplastics, Metal powders | |
| 303. |
Which of the following advantage does not possess by the rapid prototyping process over the traditional prototyping process? |
| A. | It consumes less time |
| B. | Gives better quality |
| C. | Reduces product launch time |
| D. | It's cheaper |
| Answer» D. It's cheaper | |
| 304. |
STL file format is represented by interaction of ______ |
| A. | lines and hexagons |
| B. | lines and rectangles |
| C. | lines and triangles |
| D. | lines and circles |
| Answer» C. lines and triangles | |
| 305. |
Which material possess the maximum strength? |
| A. | ABS |
| B. | PLA |
| C. | Nylon |
| D. | INF |
| Answer» C. Nylon | |
| 306. |
Which material can be efficiently used as a support material? |
| A. | ABS |
| B. | PLA |
| C. | Nylon |
| D. | INF |
| Answer» D. INF | |
| 307. |
Which material gives finest surface finish in RP? |
| A. | ABS |
| B. | PLA |
| C. | Nylon |
| D. | INF |
| Answer» B. PLA | |
| 308. |
Which materials possess highest melting temperature? |
| A. | ABS |
| B. | PLA |
| C. | Nylon |
| D. | INF |
| Answer» C. Nylon | |
| 309. |
Which file format cannot be converted into STL file format? |
| A. | .prt |
| B. | .sld |
| C. | .dwg |
| D. | .stp |
| Answer» C. .dwg | |
| 310. |
STL files contains ______ |
| A. | mass properties of the model |
| B. | geometrical data |
| C. | drawing data |
| D. | all of the above |
| Answer» B. geometrical data | |
| 311. |
In STL files when chord length decrease then accuracy _______ |
| A. | increase |
| B. | decrease |
| C. | may increase or may decrease |
| D. | remains constant |
| Answer» A. increase | |
| 312. |
Which of the following is least important in design during rapid prototyping? |
| A. | Machine size |
| B. | Tolerance |
| C. | Material |
| D. | CAD software |
| Answer» B. Tolerance | |
| 313. |
Drilling, milling and threading are examples of which kind of processes? |
| A. | Additive manufacturing |
| B. | Subtractive manufacturing |
| C. | Formative manufacturing |
| D. | None of the above |
| Answer» B. Subtractive manufacturing | |
| 314. |
Which of the following is not an example of additive manufacturing? |
| A. | Fused-deposition-modeling |
| B. | Electron beam machining |
| C. | SLS |
| D. | Injection molding |
| Answer» D. Injection molding | |
| 315. |
In 4D printing, which one is the fourth dimension? |
| A. | Time |
| B. | Material |
| C. | Sound |
| D. | Light |
| Answer» A. Time | |
| 316. |
Which of the following is not a data interfacing format? |
| A. | STL |
| B. | SLC |
| C. | LEAF |
| D. | RP |
| Answer» D. RP | |
| 317. |
Which of the following is a data interfacing format? |
| A. | HP/GL |
| B. | ACER |
| C. | ASUS |
| D. | IBM |
| Answer» A. HP/GL | |
| 318. |
STL consists of an unordered list of _______ facets representing the outside skin of an object. |
| A. | linear |
| B. | triangular |
| C. | square |
| D. | hexagonal |
| Answer» B. triangular | |
| 319. |
STL file consists of which of the following format? |
| A. | ASCII |
| B. | Binary |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» C. Both A & B | |
| 320. |
STL files plague several problems as they contain no _______ data |
| A. | geographical |
| B. | analytical |
| C. | topological |
| D. | all of the above |
| Answer» C. topological | |
| 321. |
In laminated object manufacturing (LOM), which of the following cutting strategy is preferable? |
| A. | Directional scanning |
| B. | Zigzag tool paths |
| C. | Contouring and spiral paths |
| D. | Boundary cutting tool paths |
| Answer» D. Boundary cutting tool paths | |
| 322. |
A tessellated model is said to be valid if there are ________ |
| A. | no missing facets |
| B. | no degenerate facets |
| C. | no overlapping facets |
| D. | all of the above |
| Answer» D. all of the above | |
| 323. |
Among the following, which one is the last step in Data Processing for Rapid Prototyping? |
| A. | Model slicing |
| B. | Part orientation |
| C. | Tool path generation |
| D. | Support generation |
| Answer» C. Tool path generation | |
| 324. |
Among the following, which one is the earliest step in Data Processing for Rapid Prototyping? |
| A. | Model slicing |
| B. | Part orientation |
| C. | Tool path generation |
| D. | Support generation |
| Answer» B. Part orientation | |
| 325. |
What type of inner structure makes the smoothest model in RP? |
| A. | Higher resolution |
| B. | Larger polygons |
| C. | Lower resolution |
| D. | None of the above |
| Answer» A. Higher resolution | |
| 326. |
What type of inner structure can be used to reduce the printing time of the model in RP? |
| A. | Higher resolution |
| B. | Smaller polygons |
| C. | Lower resolution |
| D. | None of the above |
| Answer» C. Lower resolution | |
| 327. |
Which of the following is an optional section of IGES format? |
| A. | Start section |
| B. | Global section |
| C. | Terminate section |
| D. | Flag section |
| Answer» D. Flag section | |
| 328. |
Which one is NOT related to rapid prototyping definition? |
| A. | Layer by layer |
| B. | Physical model |
| C. | From 3D CAD data |
| D. | Production line |
| Answer» D. Production line | |
| 329. |
Which one of the processes is NOT using a laser? |
| A. | FDM |
| B. | SLA |
| C. | SLS |
| D. | LOM |
| Answer» A. FDM | |
| 330. |
Which of the following is the process in the RP cycle? |
| A. | Post-processing |
| B. | Transfer to machine |
| C. | Pre-processing |
| D. | All of the above |
| Answer» D. All of the above | |
| 331. |
Which of the following is one of the design process steps? |
| A. | Build |
| B. | Concept |
| C. | Pre-processing |
| D. | Transfer to machine |
| Answer» B. Concept | |
| 332. |
What is the format for the prototyping machine file? |
| A. | .prt |
| B. | .slt |
| C. | .stl |
| D. | .iges |
| Answer» C. .stl | |
| 333. |
Which CAD software cannot be used to create data for the prototyping machine? |
| A. | CREO |
| B. | CATIA |
| C. | NX Unigraphics |
| D. | Adobe Illustrator |
| Answer» D. Adobe Illustrator | |
| 334. |
Which one of the process is subtractive prototyping? |
| A. | 5 axis CNC Milling |
| B. | Fused Deposition Modeling |
| C. | Multi-Jet Modeling |
| D. | Stereolithography Apparatus |
| Answer» A. 5 axis CNC Milling | |
| 335. |
From the following, in which process, the input material is in solid form? |
| A. | SLA |
| B. | SLS |
| C. | FDM |
| D. | MJM |
| Answer» C. FDM | |
| 336. |
Which of the process, the input material is in liquid form? |
| A. | LOM |
| B. | SLS |
| C. | FDM |
| D. | MJM |
| Answer» D. MJM | |
| 337. |
Which of the process, the input material is in powder form? |
| A. | LOM |
| B. | SLS |
| C. | FDM |
| D. | MJM |
| Answer» B. SLS | |
| 338. |
Which material is NOT available for LOM process? |
| A. | Paper |
| B. | Plastic |
| C. | Metal |
| D. | Glass |
| Answer» D. Glass | |
| 339. |
Which of the process is using the extrusion concept? |
| A. | SLA |
| B. | SLS |
| C. | FDM |
| D. | MJM |
| Answer» C. FDM | |
| 340. |
Which of the following is the process of the pre-processing stage? |
| A. | Remove support |
| B. | Checking 3D CAD data |
| C. | De-powdering loose material |
| D. | Dip in a binder to strengthen the part |
| Answer» B. Checking 3D CAD data | |
| 341. |
A computer model of a part design on a CAD system is called which of the following? |
| A. | Computer Prototype |
| B. | Geometric Prototype |
| C. | Solid Prototype |
| D. | Virtual Prototype |
| Answer» D. Virtual Prototype | |
| 342. |
Machining is never used for rapid prototyping because it takes too long. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 343. |
In the context of rapid prototyping and additive manufacturing, tessellation refers to the process of slicing the CAD model of the part into layers. |
| A. | Droplet Deposition Manufacturing |
| B. | Used-Deposition Modeling |
| C. | Laminated-Object Manufacturing |
| D. | Stereolithography |
| Answer» D. Stereolithography | |
| 344. |
Which of the following RP technologies uses powders as the starting material? |
| A. | Droplet Deposition Manufacturing |
| B. | Fused-Deposition Modeling |
| C. | Selective Laser Sintering |
| D. | Stereolithography |
| Answer» C. Selective Laser Sintering | |
| 345. |
Which of the following RP technologies uses molten material as the starting material? |
| A. | Three-Dimensional Printing |
| B. | Fused-Deposition Modeling |
| C. | Stereolithography |
| D. | Selective Laser Sintering |
| Answer» C. Stereolithography | |
| 346. |
Which one of the following RP technologies uses solid sheet stock as the starting material? |
| A. | Droplet deposition manufacturing |
| B. | Fused-deposition modeling |
| C. | Laminated-Object Manufacturing |
| D. | Selective Laser Sintering |
| Answer» C. Laminated-Object Manufacturing | |
| 347. |
Which of the following are examples of appropriate applications of additive manufacturing in the actual production of parts and products? |
| A. | Castings made in small quantities |
| B. | Plastic parts in small batch sizes |
| C. | Mass-produced metal parts |
| D. | Special textile products |
| Answer» B. Plastic parts in small batch sizes | |
| 348. |
Which of the following are problems with the current rapid prototyping and additive manufacturing technologies? |
| A. | Limited material variety |
| B. | Inability to convert a solid part into layers |
| C. | Poor machinability of the starting material |
| D. | The inability of the designer to design the part |
| Answer» A. Limited material variety | |
| 349. |
Of all of the current material addition rapid prototyping technologies, which one is the most widely used? |
| A. | Ballistic particle manufacturing |
| B. | Selective laser sintering |
| C. | Solid ground curing |
| D. | Stereolithography |
| Answer» D. Stereolithography | |
| 350. |
Which one of the following is not a rapid indirect tooling method? |
| A. | Vacuum Casting |
| B. | Investment Casting |
| C. | Laser-Engineered Net Shaping |
| D. | Injection molding |
| Answer» C. Laser-Engineered Net Shaping | |
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