Question

Liquid chemical rockets are often classified by the type of propellants used. Which of the following is correct?

• A. Monopropellant, Bipropellant, Hybrid
• B. Solid, Gel, Cryogenic
• C. Hypergolic, Cryogenic, Storable
• D. Air-breathing, Non-air-breathing, Hybrid

Hint:

Liquid rocket propellants are commonly classified as \[ \boxed{ \begin{aligned} \text{Hypergolic} &\rightarrow \text{Ignite on contact} \text{Cryogenic} &\rightarrow \text{Stored at very low temperatures} \text{Storable} &\rightarrow \text{Stored at normal temperatures} \end{aligned} } \]

Answer 1

The Correct Option is C

Step 1: Recall the classification of liquid propellants. Liquid propellants are commonly classified according to their storage and ignition characteristics. Major classes include
• Hypergolic propellants,
• Cryogenic propellants,
• Storable propellants.

Step 2: Identify the correct classification. Therefore, \[ \boxed{ \text{Hypergolic, Cryogenic, Storable} } \] is the correct classification of liquid chemical rocket propellants. Hence, \[ \boxed{(C)} \] is the correct answer.