Everyday Science MCQs

3 Questions
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1
Hard fpsc ppsc nts

Which gas is primarily responsible for causing the bends in deep sea divers who ascend too quickly?

  • A Oxygen
  • B Nitrogen
  • C Carbon dioxide
  • D Helium
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Correct Answer: Option B — Nitrogen
Explanation: Nitrogen dissolved in the bloodstream under high pressure can form bubbles if a diver ascends too quickly causing decompression sickness commonly known as the bends.
2
Hard fpsc ppsc nts

Which scale is used to estimate wind speed based on observed sea or land conditions without instruments?

  • A Richter scale
  • B Beaufort scale
  • C Fujita scale
  • D Saffir-Simpson scale
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Correct Answer: Option B — Beaufort scale
Explanation: The Beaufort scale estimates wind speed by observing its effects on sea waves and land conditions providing a practical method for assessing wind force without specialized instruments.
3
Hard fpsc ppsc nts

Which scale is commonly used to measure the intensity of hurricanes and tropical cyclones?

  • A Richter scale
  • B Saffir-Simpson scale
  • C Beaufort scale
  • D Fujita scale
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Correct Answer: Option B — Saffir-Simpson scale
Explanation: The Saffir-Simpson scale categorizes hurricanes into five categories based on sustained wind speed helping predict potential damage and guide disaster preparedness measures.
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