Multiple choice

Cryogenic engines find applications in _____.

  1. rocket technology

  2. frost-free refrigerators

  3. submarine propulsion

  4. researches in superconductivity
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cryogenic engines use extremely cold liquefied gases like liquid hydrogen and liquid oxygen as fuel, making them essential for rocket technology where maximum thrust and efficiency are required. They're not used in refrigerators or submarines.

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