UPSC | Prelims GS | 2026

China’s announced controls on tunnel-boring machines specifically cover machinery used in terrain at altitudes:

  1. above 300 metres
  2. above 1,000 metres
  3. above 3,000 metres
  4. above 10,000 metres

Answer

Correct Answer

above 3,000 metres

Explanation

The article specifies machinery used in mountainous terrain and at altitudes above 3,000 metres. The other thresholds do not appear in the announcement reported. The measure is framed as export control for dual-use items.

Topics: china export controls, dual-use technology, international relations, tunnel-boring machines above 3,000 metres