UPSC 2026: Which of the following statements with regard to Black Boxes used in modern aircrafts is/are correct ? 1. They carry a beacon emitting red light pulses to facilitate underwater detection. 2. They record both the cockpit voice and flight data. 3. Their memory units are made using either stainless steel or titanium. Select the answer using the code given below :

The correct answer is option (b): 2 and 3 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.

This question was asked in UPSC CSE Prelims 2026, GS Paper 1, as Question 69. It falls under Science & Technology > Materials & Engineering.

This question is rated "moderate". It requires sound conceptual understanding of the topic.

UPSC has asked 24 questions from Materials & Engineering (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.