Hybrid rocket engines are also called as ________ propellant rocket engines.
A. solid
B. liquid
C. both
D. none
Answer:A
Hybrid rocket engines are also called as ________ propellant rocket engines.
A. solid B. liquid C. both D. none
Explanation: Hybrid rocket engines are also called as liquid propellant rocket engines. Because fuels used in hybrid engines are in liquid state.