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GS Paper IUPSC Prelims 2013
Health & Medicine
Question No. 190Interactive Test Mode
00:00
+2-0.66

Q190. Ball bearings are used in bicycles, cars, etc., because –

Ball bearings are used in bicycles, cars, etc., because –

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 2013 • Science and Technology

Correct Answer: Option (C) — the effective area of contact between the wheel and axle is reduced

Concept & Option Breakdown

Standard Reference Verified

Option (c) is correct: Ball bearings replace sliding friction with rolling friction. By converting surface-to-surface contact into point contacts via rotating balls, the effective contact area and frictional resistance between moving parts are drastically reduced.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2013 (Q190)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (C) — the effective area of contact between the wheel and axle is reduced

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Frequently Asked Questions — UPSC Prelims 2013 Q190

What is the official answer for UPSC Prelims 2013 GS Paper I Question 190 (Science and Technology)?

The official UPSC answer key for this 2013 Science and Technology (Health & Medicine) question is Option (C): "the effective area of contact between the wheel and axle is reduced". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2013 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine 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 Health & Medicine UPSC Prelims question using option elimination?

To solve Health & Medicine questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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