Question 4: Convair had come a close second
but Glennan did not want to monopolize the liquid hydrogen fueled
rocket market as Convair was already building the ________.
Question 5: During ________, Apollo 14, Apollo 15, Apollo 16 and Apollo 17, the S-IVB was
crashed into the Moon in order to
perform seismic measurement used for characterizing the lunar
core.
Question 7: The S-IVB (sometimes S4b, always pronounced
"ess four bee") was built by the ________ and
served as the third stage on the Saturn V and second stage on the Saturn IB.