“3D printing” has applications in which of the following? 1. Preparation of confectionery items 2. Manufacture of bionic ears 3. Automotive industry 4. Rec

1. A. 1, 3 and 4 only
2. B. 2, 3 and 5 only
3. C. 1 and 4 only
4. D. 1, 2, 3, 4 and 5

Answer: D

Explanation

3D printing or additive manufacturing is a process of making three dimensional solid objects from a digital file. The creation of a 3D printed object is achieved by laying down successive layers of material until the object is created. Each of these layers can be seen as a thinly sliced horizontal cross-section of the eventual object. Recently 3-D printed food restaurant has come up in Netherlands. In America, 3D printed bionic ear was generated via 3D printing of a cell-seeded hydrogel matrix in the anatomic geometry of a human ear. Industrial 3D printers have opened new paths at each stage of production of motor vehicles; from the functional prototyping phases, design, and tooling production to parts manufacturing, the automotive industry is one of the pioneers in the use and integration of 3D printing in its processes. 3 D printing has been used in reconstructive surgery to help repair damaged tissue for example in cases of birth defects or traumatic injuries to severe burns or disease. 3 D printing is used to produce computer parts (such as circuit boards) which are used in data processing.