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:
Select an option to reveal the answer and explanation.
A hard Science & Technology multiple-choice question from UPSC Prelims 2026. Attempt it above, then check the correct answer and detailed explanation below.
Show correct answer & explanation
Correct answer: B. 2 and 3 only
Statements 2 and 3 are correct — a black box records both cockpit voice and flight data, and its memory units are encased in stainless steel or titanium. Statement 1 is wrong — the underwater locator beacon emits acoustic (ultrasonic) pulses, not red light.
Practise writing a full Science & Technology answer and get it graded by our AI examiner — free.
More Science & Technology questions
Which one of the following words/phrases is most appropriately used to denote "an interoperable network of 3D virtual worlds that can be accessed simultaneously by millions of users, who can exert property rights over virtual items"?
Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used as feedstock for producing Sustainable Aviation Fuel?
"Membrane Bioreactors" are often discussed in the context of:
Recently, the term "pumped-storage hydropower" is actually and appropriately discussed in the context of which one of the following?
Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen?
In which of the following are hydrogels used? 1. Controlled drug delivery in patients 2. Mobile air-conditioning systems 3. Preparation of industrial lubricants Select the correct answer using the code given below: