Consider the following statements regarding scramjet: 1. It stands for supersonic combustion ramjet. 2. It uses atmospheric oxygen to burn hydrogen fuel. 3. These are efficient only at hypersonic speed. Which of the statements given above is/are incorrect

Question: Consider the following statements regarding scramjet: 1. It stands for supersonic combustion ramjet. 2. It uses atmospheric oxygen to burn hydrogen fuel. 3. These are efficient only at hypersonic speed. Which of the statements given above is/are incorrect?

A. 1 only
B. 1 and 2 only
C. 3 only
D. 2 and 3 only

Important Science and Technology current affairs gk mcq pdf

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