Core5 mapped NDA questions
Build the idea
Build exam-ready understanding by connecting the core idea, formulas or facts, worked example and previous NDA questions. Focus on why each rule works, then test it under timed conditions.
Concept
Transport networks — roads, railways, waterways and airways — move goods and people and support trade. India has one of the largest rail and road networks in the world.
Ports handle most of the country's international trade by volume.
Key Points & Formulas
- Railways are the principal mode of long-distance land transport.
- Major ports: Mumbai (JNPT), Chennai, Kolkata, Visakhapatnam, Kandla.
- National Highways connect major cities; the Golden Quadrilateral links the four metros.
- Inland waterways and coastal shipping are cheap for bulk goods.
Worked Example
Q. Why is sea transport preferred for bulky international cargo?
Ships can carry very large volumes at low cost per tonne.
Most of India's foreign trade by weight moves through ports.
Hence sea transport is preferred for bulk cargo.