GATE Mechanical Engineering: 40 Years of Patterns
Data analysis of every GATE Mechanical Engineeringquestion 1987-2026. What's tested year after year, what shifted, what to focus on.
Top 20 most-tested topics
Sorted by total question count. The "appeared in" column shows recurrence — topics in 30+ different years are near-guarantees for the next exam.
| Topic | Total Qs | Years appeared | First → Last | Recurrence |
|---|---|---|---|---|
| Calculus (ME) | 101 | 25 | 1993 → 2025 | 63% |
| Machining | 86 | 32 | 1987 → 2025 | 80% |
| Machine Tools | 67 | 26 | 1988 → 2024 | 65% |
| Casting | 60 | 31 | 1987 → 2025 | 78% |
| Operations Research | 56 | 23 | 1995 → 2024 | 57% |
| Forming | 56 | 25 | 1987 → 2025 | 63% |
| Linear Algebra (ME) | 56 | 22 | 1994 → 2024 | 55% |
| Differential Equations (ME) | 54 | 26 | 1993 → 2025 | 65% |
| First Law | 50 | 21 | 1993 → 2025 | 53% |
| Joining | 50 | 30 | 1989 → 2025 | 75% |
| Conduction | 48 | 25 | 1989 → 2023 | 63% |
| Second Law | 47 | 25 | 1990 → 2024 | 63% |
| Vibrations | 43 | 20 | 1997 → 2026 | 50% |
| Probability & Stats (ME) | 41 | 20 | 1998 → 2025 | 50% |
| Power Cycles | 40 | 24 | 1989 → 2025 | 60% |
| Kinematics | 40 | 22 | 1988 → 2025 | 55% |
| Dynamics | 38 | 19 | 1994 → 2025 | 48% |
| Convection | 35 | 22 | 1988 → 2024 | 55% |
| Heat Exchangers | 34 | 25 | 1988 → 2024 | 63% |
| Metrology | 33 | 23 | 1987 → 2025 | 57% |
Recurrence ≥ 80% means the topic appears in at least 32 of 40 years — functionally guaranteed.
The NAT shift: 0% → 28%
2010-2013
1%
NAT share (pre-shift era)
2014-2020
39%
NAT introduced
2021-2026
36%
NAT entrenched
Numerical Answer Type (NAT) questions did not exist in GATE Mechanical Engineering before 2014. Today they make up roughly a quarter of every paper. Aspirants studying from pre-2014 textbooks are training for an exam that no longer exists.
Question type mix by year
| Year | MCQ | NAT | MSQ/MTF | % NAT |
|---|---|---|---|---|
| 2026 | 43 | 20 | 1 | 31% |
| 2025 | 65 | 43 | 5 | 38% |
| 2024 | 73 | 35 | 0 | 32% |
| 2023 | 54 | 37 | 3 | 39% |
| 2022 | 50 | 29 | 11 | 32% |
| 2021 | 73 | 54 | 0 | 42% |
| 2020 | 28 | 1 | 0 | 3% |
| 2019 | 92 | 51 | 0 | 35% |
| 2018 | 151 | 95 | 2 | 38% |
| 2017 | 37 | 36 | 0 | 49% |
| 2016 | 51 | 35 | 0 | 40% |
| 2015 | 62 | 51 | 0 | 44% |
| 2014 | 82 | 69 | 1 | 44% |
| 2013 | 39 | 0 | 0 | 0% |
Why this matters
- Data Structures has appeared in 35different years. That's a near-guarantee, not a probability.
- 5 sub-topics under Discrete Mathematicsall appear 80%+ years. Treating Discrete Math as one chapter is a mistake — it's 5 separate guaranteed topics.
- NAT now ≈ 30% of paper. Anyone preparing only MCQs is losing 30 marks before they walk in.
- General Aptitude grew 10× — from 10 Qs (2010-2015) to 107 Qs (2021-2026). Coaching books that ignore GA are obsolete.
- Topics absent for 5+ years tend to return.Spectrum of what's overdue: —