Multiple choice

Which of the following statements is/are correct?

  1. Launching heavy satellites weighing over 2 tons into geostationary orbit requires an upper stage powered by a cryogenic engine.
  2. Cryogenic technology involves the use of liquid oxygen at minus 183 degrees Celsius and liquid hydrogen at minus 253 degrees Celsius.

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement 1 is true: Launching heavy satellites weighing over 2 tons into geostationary orbit requires an upper stage powered by a cryogenic engine. Cryogenic engine is indispensable for such launch vehicles as this engine provides the required trust to the vehicle. Statement 2 is also correct: Cryogenic technology involves the use of liquid oxygen (as oxidizer) at minus 183 degrees Celsius and liquid hydrogen (as fuel) at minus 253 degrees Celsius.

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