🔬 Science & TechnologyUPSC 2008Space & Space Technology

Consider the following statements in respect of a jet engine and a rocket:1. A jet engine uses the surrounding air for its oxygen supply and so is unsuitable for motion in space.2. A rocket carries its own supply of oxygen in the gas form, and fuel.Which of the statements given above is/are correct?

a1 only
b2 only
cBoth 1 and 2
dNeither 1 nor 2
✓ Correct answer: a) 1 only
ExplanationStatement 1 is correct: A jet engine relies on the oxygen in the Earth’s atmosphere for combustion.In space, where there is no atmosphere, a jet engine cannot function because it cannot obtain the necessary oxygen for burning fuel.Statement 2 is incorrect: Rockets do carry their own supply of oxygen, but typically, the oxygen is not in gas form.It is usually stored as a liquid oxidizer (e.g., liquid oxygen, LOX) along with the fuel.293

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