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Topic Heat Transfer
Asked 2 times across 2 UPSC exams over 2 years (2016–2018), peaking in 2018.
Key insights
- Most tested in CDS — 1 of 2 PYQs
- Most asked in 2018
- Recurs across 2 years (2016–2018)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
EPFO 2016 → CDS 2018
How the concept evolved
Rising — more than half its appearances (2 of 2) 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.
CDS2018
In which of the following, heat loss is primarily not due to convection?
- A Boiling water
- B Land and sea breeze
- C Circulation of air around blast furnace
- D Heating of glass surface of a bulb due to current in filament ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
EPFO2016
Statement IIt is a common observation that if we place a glass of ice-water on a table at room temperature, the ice-water will get warmer
Statement IIHeat is energy that flows between a system and its environment because of temperature difference between them
- A Both the statements are individually true and Statement II is the correct explanation of Statement I ✓
- B Both the statements are individually true but Statement II is not the correct explanation of Statement I
- C Statement I is true but Statement II is false
- D Statement I is false but Statement II is true
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
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