The propellant feeding system of liquid rocket engine includes: ____.
A. Vacuum system
B. Pressure-feed system
C. Gravity transporting system
D. Pump-feed system
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About "Minuteman III", which of following are true? ____.
A. It is intercontinental missile
B. It is ballistic missile
C. The third stage adopts solid rocket engine
D. It has a firing range of more than 12,000 kilometers
The thrust direction of rocket engine could be control by: ____.
A. Valve
B. Secondary injection technology
C. Swinging nozzle
D. Jetavator
Solid rocket engines generally are using on: ____.
A. Sounding rockets
B. Air-to-air missiles
C. Rocket boosters
D. Main engine of space shuttle
The performance indicators of a rocket engine refer to the engine's : ____.
A. Thrust-weight ratio
B. Thrust
C. Impulse
D. Specific impulse
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