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GS Paper IUPSC Prelims 2023
Nanotechnology
Question No. 94Interactive Test Mode
00:00
+2-0.66

Q94. Consider the following statements: 1. Carbon fibres are used in the manufacture of components used in automobiles and aircrafts. 2. Carbon fibres, once used, cannot be recycled. Which of the statements given above is/are correct?

Consider the following statements:

  1. Carbon fibres are used in the manufacture of components used in automobiles and aircrafts.
  2. Carbon fibres, once used, cannot be recycled. Which of the statements given above is/are correct?
Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2023 • Science and Technology

Correct Answer: Option (A) — 1 only

Concept & Option Breakdown

Standard Reference Verified

Statement 1 is correct: Due to their high tensile strength, stiffness, low density, and high chemical resistance, carbon fiber reinforced polymers (CFRP) are extensively used in aviation and high-performance automobile components. Statement 2 is incorrect: Carbon fibers can be recycled using thermal processes (pyrolysis, fluidized bed), chemical processes (solvolysis), or mechanical recycling methods to recover valuable fibers.

Elimination Heuristic & Exam Approach

Absolute negative assertions like 'cannot be recycled' are usually false given modern advances in materials science.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2023 (Q94)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Nanotechnology
Official Answer KeyOption (A) — (a) 1 only

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Frequently Asked Questions — UPSC Prelims 2023 Q94

What is the official answer for UPSC Prelims 2023 GS Paper I Question 94 (Science and Technology)?

The official UPSC answer key for this 2023 Science and Technology (Nanotechnology) question is Option (A): "(a) 1 only". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2023 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Nanotechnology". You can explore all repeated questions from Nanotechnology in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Nanotechnology UPSC Prelims question using option elimination?

Absolute negative assertions like 'cannot be recycled' are usually false given modern advances in materials science.

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