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Topic Drainage Systems
Asked 4 times across 2 UPSC exams over 23 years (1998–2021), peaking in 2017.
Key insights
- Most tested in CSE — 2 of 4 PYQs
- Most asked in 2017
- Recurs across 4 years (1998–2021)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 1998 → CAPF 2018
How the concept evolved
Rising — more than half its appearances (3 of 4) 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.
CAPF2021
Match List-I with List-II and select the correct answer using the code given below the Lists
| List I (Tributary) | List II (River) |
|---|
| A. Sutlej | 1. Yamuna |
| B. Kosi | 2. Brahmaputra |
| C. Teesta | 3. Ganga |
| D. Chambal | 4. Indus |
Codes:
- A A-1 B-3 C-2 D-4
- B A-1 B-2 C-3 D-4
- C A-4 B-3 C-2 D-1 ✓
- D A-4 B-2 C-3 D-1
✓ Correct answer: (C)
Geography › Physical Geography of India
CAPF2018
Which one of the following rivers is west-flowing?
- A Godavari
- B Periyar
- C Tungabhadra
- D Cauvery ✓
✓ Correct answer: (D)
Geography › Physical Geography of India
CSE2017
With reference to river Teesta, consider the following statements
- The source of river Teesta is the same as that of Brahmaputra but it flows through Sikkim
- River Rangeet originates in Sikkim and it is a tributary of river Teesta
- River Teesta flows into Bay of Bengal on the border of India and Bangladesh
Which of the statements given above is/are correct ?
- A 1 and 3 only
- B 2 only ✓
- C 2 and 3 only
- D 1, 2 and 3
✓ Correct answer: (B)
Geography › Physical Geography of India
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