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During my college days at Colorado State University in the mid-seventies,
the Hydraulics graduate students at the Engineering Research Center were well aware of what it took
to conquer the hurdles. Prof. Prof. Simons
had a reputation for toughness; however,
he always asked the same question on the preliminary exam:
"If you drop a spherical particle in a flask full of
water, what is the velocity distribution in the space between the particle and the inner wall of the
flask?"
Everybody knew the answer, and Prof. Simons
invariably started every prelim exam
with the famous question.
One day, a student worked up some courage, and asked him:
"Prof. Simons, you always ask
the same question on the prelim. Everybody knows the answer. Why?"
Simons responded with a smile: "Its simple; whoever does not know the answer, I flunk him."
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