UPSC Prelims 2018 · GS Paper I
Question 84: Science and Technology
“3D printing” has applications in which of the following ?
- 1.Preparation of confectionery items
- 2.Manufacture of bionic ears
- 3.Automotive industry
- 4.Reconstructive surgeries
- 5.Data processing technologies
Select the correct answer using the code given below :
AnswerUPSC’s answer is (d).
3D printing builds objects layer by layer from a digital design. It is used to print chocolate and other confectionery, bionic ears, car parts and prototypes in the automotive industry, implants and tissue structures for reconstructive surgery, and components of electronics and data-handling hardware. UPSC's key counts all five as correct.
- 1. Edible 3D printers make chocolate and sugar items.
- 2. Bionic ears have been 3D printed.
- 3. It is used for car parts and prototypes.
- 4. It is used for implants and reconstructive surgery.
- 5. UPSC counts it as true; printing is used to make electronics and data hardware.
How you could have got this
- If you were sure statement 1 is correct, (b) goes: it leaves 1 out.
What you needed to know: Edible 3D printers make chocolate and sugar items.
- Then, if you were sure statement 2 is correct, (a) and (c) go: each of them leaves 2 out.
What you needed to know: Bionic ears have been 3D printed.
Only (d) is left. You didn’t need statements 3, 4 or 5.
Which options go is worked out from UPSC’s key and the options, not by a model.
Why each option is right or wrong
- (a) Incomplete: bionic ears and data technologies are also applications.
- (b) Incomplete: confectionery and surgery also apply.
- (c) Incomplete: bionic ears, automotive and data technologies also apply.
- (d) Right: all five.
Worth knowing: Statement 5 is loosely worded; UPSC's key counts it as correct.
Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.
Source: UPSC, Civil Services (Preliminary) Examination 2018, General Studies Paper I, Series A. The paper on upsc.gov.in.