Geography Master – Quick Revision
RRB Exams | 25-Dec-2025
ONE-LINERS (20)
- Earth’s core is mainly Fe-Ni (Iron-Nickel).
- 23½° N latitude is the Tropic of Cancer.
- Alps → Europe; Atlas → Africa.
- Sundarbans is the world’s largest tidal mangrove forest.
- Nile is longer, Amazon carries more water.
- Deepest ocean trench: Mariana (Pacific).
- Saffron mostly grows in Jammu & Kashmir (Pampore).
- Laterite soil = high Fe-Al, ideal for cashew.
- Black soil is “Regur” – cotton friendly.
- Shifting cultivation in NE India is called Jhum.
- Monsoon burst is the sudden onset of rain (1-Jun, Kerala).
- Coriolis force deflects winds right in N-hemisphere.
- Isohyet joins equal rainfall points.
- Rohtang Pass links Kullu-Lahaul-Spiti.
- Mangalore receives orographic rain (Western Ghats).
- Hirakud dam is on Mahanadi (Odisha).
- Rihand → Govind Ballabh Pant Sagar (UP).
- Narmada flows west through rift valley.
- Red soil is poor in N, P, K yet good for groundnut.
- Dudhwa NP is the only Sal forest in UP.
FORMULAS / RULES (8)
| Formula | Use |
|---|---|
| Time diff = Longitude diff × 4 min | Convert ° to minutes. |
| 1° lat ≈ 111 km | Distance estimation. |
| Pressure gradient = ΔP / ΔD | Wind speed predictor. |
| Rainfall variability = (Std Dev ÷ Mean) × 100 | Drought risk. |
| Heat index = T + 0.36(Td) + 41 | Human comfort. |
| Run-off coefficient = Run-off ÷ Rainfall | Water-resource planning. |
| Irrigation intensity = Gross irrigated area ÷ Net sown area × 100 | Cropping intensity. |
| Population density = Total pop ÷ Area (km²) | Census stat. |
MEMORY TRICKS (5)
- Great Lakes order west→east: “Super Man Helps Every One” – Superior, Michigan, Huron, Erie, Ontario.
- Winds from horse latitudes→trade winds: “Horses TRADE across the ocean.”
- Soil colours: “Black-Blue-Red-Yellow” → Cotton-Rice-Millets-Tea preference.
- West-flowing rivers of Peninsular India: “Tapti Narmada Mahi Sabarmati = TNMS (T-Norms).”
- Cloud types high→low: “Cirro-Strato-Nimbo = CSN (Civil Services Need).”
COMMON ERRORS (5)
| Error | Correct |
|---|---|
| Chilika is a lake in AP | Odisha |
| Everest is in Nepal only | Nepal-China border |
| Laterite = fertile black | Infertile, needs manure |
| Coriolis is zero at poles | Zero only at equator |
| Westerlies blow e→w | Westerlies blow w→e |
5 QUICK MCQs
Question 1
Which plateau is known as the ‘Mineral Heart’ of India? A) Malwa B) Chota Nagpur C) Deccan D) Bundelkhand Answer: BQuestion 2
The only state with all three crocodile species (Gharial, Mugger, Salt-water) is: A) Odisha B) MP C) Gujarat D) West Bengal Answer: AQuestion 3
‘Dogger Bank’ is associated with: A) Indian Ocean B) Pacific C) Atlantic D) North Sea Answer: DQuestion 4
The river not forming a delta is: A) Mahanadi B) Narmada C) Godavari D) Krishna Answer: BQuestion 5
Which line divides India & Afghanistan? A) McMahon B) Durand C) Radcliffe D) Palk Strait Answer: BRevise→Recall→Rock the exam!
BETA
