Exam (elaborations)
PROPULSION SYSTEMS EXAM WITH VERIFIED ANSWERS AND QUESTIONS
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PROPULSION SYSTEMS EXAM WITH VERIFIED ANSWERS AND QUESTIONS....
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The three measures of propulsion system performance are _____, _________,and __________. - ANSWER thrust, thrust duration, thrust efficiency
The two sources of thrust from a rocket motor are _______________ and
_____________. - ANSWER kinetic thrust (exit of mass flow rate), pressure
thrust
Thrust times _______ is equivalent to propulsion energy. - ANSWER time
The optimum latitude for launch from the Earth's surface is ________ degrees. -
ANSWER 0
Specific impulse is the ratio of ______ to _______________. - ANSWER
thrust, unit weight flow rate
The two forces that require additional delta V to reach orbit from Earth's surface
(in addition to acceleration needed for orbital velocity) are __________ and
__________. - ANSWER gravity, drag
The typical value for the combined delta V required for orbit entry due to
gravity and drag is ________________ m/s - ANSWER 1400
The two types of propulsion systems that have sufficient thrust for launching
payloads into low-Earth orbit are ________ fuel systems and _________ fuel
systems. - ANSWER liquid, solid
Multi-stage solid fuel rockets can place only ____________ mass objects in
orbit. - ANSWER small
Liquid monopropellant propulsion systems are used primarily for
_______________. - ANSWER attitude control/trajectory correction on large
spacecraft
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