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Everyday Science MCQs

45 Questions Subject Test
Subject Preparation Guide

Prepare Everyday Science with confidence

Understand the science behind daily life through questions covering health, energy, environment, inventions and natural phenomena.

Human BodyEnergyEnvironmentScientific Inventions
Important for general science portions of CSS, PMS, FPSC and provincial tests.
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41
Hard css fpsc

Which everyday process explains how noise-cancelling headphones work?

  • A Reflecting sound waves outward
  • B Absorbing sound with foam only
  • C Increasing inner air pressure
  • D Generating sound waves that cancel incoming noise
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Correct Answer: Option D — Generating sound waves that cancel incoming noise
Explanation: Noise-cancelling headphones use microphones to detect ambient sound and generate opposing sound waves that cancel out the incoming noise through destructive interference.
Submitted by: PaperMCQs
42
Hard css fpsc

Which type of radiation has the greatest penetrating power among alpha beta and gamma radiation?

  • A Gamma
  • B Alpha
  • C Beta
  • D All equal
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Correct Answer: Option A — Gamma
Explanation: Gamma radiation has the greatest penetrating power and can pass through dense materials like lead only being significantly blocked by thick lead or concrete shielding.
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43
Hard css fpsc ppsc

Which part of the nervous system is called the automatic system and controls involuntary body functions like digestion?

  • A Somatic nervous system
  • B Central nervous system
  • C Autonomic nervous system
  • D Peripheral nervous system
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Correct Answer: Option C — Autonomic nervous system
Explanation: The autonomic nervous system regulates involuntary functions like digestion heartbeat and breathing without conscious effort and is divided into sympathetic and parasympathetic divisions.
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44
Medium css fpsc ppsc

Which scale measures the hardness of minerals, with diamond being the hardest at 10?

  • A Richter scale
  • B Mohs scale
  • C Beaufort scale
  • D Kelvin scale
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Correct Answer: Option B — Mohs scale
Explanation: The Mohs hardness scale ranks minerals from 1 to 10 based on their ability to scratch each other with diamond rated at 10 as the hardest naturally occurring mineral.
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45
Medium css fpsc

Which everyday item uses the principle of total internal reflection to transmit data as light signals?

  • A Periscope
  • B Optical fibre cable
  • C Telescope
  • D Microscope
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Correct Answer: Option B — Optical fibre cable
Explanation: Optical fibre cables use total internal reflection to transmit data as pulses of light over long distances with minimal signal loss forming the backbone of modern internet.
Submitted by: PaperMCQs
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