Question

One major advantage of liquid propellant rockets over solid propellant rockets is

• A. Higher structural simplicity
• B. Ability to throttle and restart
• C. Lower cost
• D. No need for feed system

Hint:

Comparison of rocket engines: \[ \boxed{ \begin{aligned} \text{Solid Rocket} &\rightarrow \text{Simple, cannot throttle or restart} \text{Liquid Rocket} &\rightarrow \text{Throttleable and restartable} \end{aligned} } \]

Answer 1

The Correct Option is B

Step 1: Recall the characteristics of liquid propellant rockets. Liquid propellant rockets use separate fuel and oxidizer tanks with a controlled feed system. This allows the engine to regulate the propellant flow during operation.

Step 2: Identify the major advantage. Since the propellant flow can be controlled, \[ \boxed{ \text{liquid rocket engines can be throttled, shut down, and restarted.} } \] This flexibility is not available in conventional solid propellant rockets. Therefore, \[ \boxed{\text{Ability to throttle and restart}} \] is the correct answer. Thus, \[ \boxed{(B)} \] is the correct answer.