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Topic Units and measurement
Asked 3 times across 2 UPSC exams over 7 years (2018–2025), peaking in 2025.
Key insights
- Most tested in CISF — 2 of 3 PYQs
- Most asked in 2025
- Recurs across 2 years (2018–2025)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2018 → CISF 2025
How the concept evolved
Rising — more than half its appearances (3 of 3) are since 2016.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CISF2025
One horsepower is equal to :
- A 100 W
- B 1000 W
- C 746 W ✓
- D 786 W
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
CISF2025
Dioptre is the unit of :
- A diffusion rate
- B power of lens ✓
- C focal length
- D intensity of light
✓ Correct answer: (B)
Science & Technology › Physics & Chemistry
CDS2018
Which one of the following is the value of one nanometer?
- A 10⁻⁷ cm ✓
- B 10⁻⁶ cm
- C 10⁻⁴ cm
- D 10⁻³ cm
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
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