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GS Paper IUPSC Prelims 2023
Health & Medicine
Question No. 151Interactive Test Mode
00:00
+2-0.66

Q151. Consider the following actions: 1. Detection of car crash/collision, which result in the deployment of airbags almost instantaneously. 2. Detection of accidental free fall of a laptop towards the ground which results in the immediate turning off of the hard drive. 3. Detection of the tilt of the smart-phone which results in the rotation of display between portrait and landscape mode. In how many of the above actions is the function of the accelerometer required?

Consider the following actions:

  1. Detection of car crash/collision, which result in the deployment of airbags almost instantaneously.
  2. Detection of accidental free fall of a laptop towards the ground which results in the immediate turning off of the hard drive.
  3. Detection of the tilt of the smart-phone which results in the rotation of display between portrait and landscape mode.

In how many of the above actions is the function of the accelerometer required?

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 (C) — All three

Concept & Option Breakdown

Standard Reference Verified

An accelerometer measures dynamic and static acceleration forces in all three cases:

  • Statement 1 is correct: Crash sensors in vehicles use accelerometers to detect rapid deceleration during a collision and trigger airbag deployment.
  • Statement 2 is correct: Active protection systems in laptops employ accelerometers to detect sudden free fall and park the mechanical hard disk heads safely.
  • Statement 3 is correct: Smartphones use MEMS accelerometers to detect orientation changes relative to gravity to switch between portrait and landscape modes.
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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2023 (Q151)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (C) — All three

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Frequently Asked Questions — UPSC Prelims 2023 Q151

What is the official answer for UPSC Prelims 2023 GS Paper I Question 151 (Science and Technology)?

The official UPSC answer key for this 2023 Science and Technology (Health & Medicine) question is Option (C): "All three". 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 "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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