Q. Consider the following statements regarding cryogenic engines:
1.They consist of liquid hydrogen as fuel and liquid oxygen as oxidizer.
2.They are mainly used in the initial lower stage of a rocket launch as they provide the maximum thrust to a launcher vehicle.
3.GSLV MkIII vehicle consists of two solid strap-on motors, one earth storable liquid core stage and the cryogenic upper stage.
How many of the above statements are correct?
Answer: B
Notes:
Explanation: Statements 1 and 3 are correct
Statement 1 is correct: Most widely used cryogenic engines employ liquid hydrogen as the fuel and liquid oxygen as the oxidizer. These cryogenic propellants are liquefied gases stored at very low temperatures.
Statement 2 is incorrect: Cryogenic engines are mainly used in the upper stage of a rocket launch as they provide the maximum thrust to a launcher vehicle.
Statement 3 is correct: The GSLV MkIII (LVM3) rocket developed by ISRO is a three-stage vehicle with two solid strap-on motors, one liquid core stage, and a cryogenic upper stage. The cryogenic upper stage uses liquid oxygen and liquid hydrogen as propellants.
