Civil Services Prep

Prelims 2023 · Science and Technology · Question 84

Consider the following actions: 1. Detection of car crash/collision which results 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 smartphone which results in the rotation of display between portrait and landscape mode. In how many of the above actions is the function of accelerometer required?

  1. Only one
  2. Only two
  3. All three
  4. None

Answer

All three

1. Car crash detection/airbag deployment: Accelerometers detect sudden deceleration/impact forces and trigger airbags. Verdict: Correct.

2. Laptop free-fall detection: Many laptops use an accelerometer to sense free fall and park/turn off the hard drive to prevent damage. Verdict: Correct.

3. Smartphone screen rotation: Screen orientation changes are commonly based on accelerometer sensing tilt relative to gravity. Verdict: Correct.

Hence, all three actions require the function of an accelerometer.

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