Question

Q51) Recently ISRO carried out successful testing of scramjet engine. Which of the following statements is/are true with respect to it?

1. It uses atmospheric oxygen to burn the fuel

2.It is more efficient than conventional rocket engines at low speeds.

3.A rocket using scramjet engine would be significantly lighter,smaller and therefore cheaper

• A. a) Only 1
• B. b)Only 1 and 3
• C. c)Only 1 and 2
• D. d)All of the above

Answer 1

The correct option is B

b)Only 1 and 3

Answer 51: B

Explanation: Scramjet stands for Supersonic Combustion Ramjet. It is also called the air breathing engine as it uses atmospheric
oxygen to burn the fuel. Scramjets are efficient only at supersonic speed. A rocket using scramjet engine would be significantly lighter,
smaller and therefore cheaper as scramjet uses atmospheric oxygen to burn the fuel in the first phase will considerably reduce the
amount of oxidiser to be carried aboard.