Space MIAD Practice Test

Which of the following is an advantage of solid propellant?

1. Can actively throttle

2. Difficult to vector thrust

3. Simple and inexpensive

4. Requires complex storage

The correct answer is: Simple and inexpensive

Solid propellants are known for their simplicity and cost-effectiveness, making this an important advantage. The manufacturing process of solid propellant is generally less complex than that of liquid propellants. This translates to lower costs in production, logistics, and handling. Additionally, solid propellant rockets are more straightforward to assemble and operate since they do not require separate tanks for fuel and oxidizer, simplifying the overall design and reducing the potential points of failure. This simplicity also means that solid propellant systems can be more robust and require less maintenance compared to liquid systems, which often involve more intricate pumping and valve systems. The lower complexity and cost contribute significantly to the appeal of solid propellants for various applications, especially in military and commercial launch vehicles. The context for this choice helps illustrate the distinctive characteristics of solid propellant systems compared to other propulsion types.