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English Grammar Exercises

Alexandria's Greatest Inventor

ESL test for advanced level students

Home > Free English Tests for ESL/EFL > English Language Proficiency Test, Advanced Level # 368
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Nearly 2000 years before the Industrial Revolution, an Alexandrian's amazed his contemporaries with many ......... inventions.

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The Greeks have long been known for their artists, poets, and craftsmen. However, Alexandria also became a ......... for science, philosophy and engineering.

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The city brought together the best of Persian, Egyptian, Babylonian and Greek scientists. Through an exchange of ideas, the Greeks built steam engines, pumps, presses, clocks and ......... calculators.

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Hero was considered to be Alexandria's greatest engineer. It was he who first understood the potential and ......... of steam power.

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Hero was a popular ......... in regard to displaying his scientific experiments. His fellow citizens would ask Hero to demonstrate inventions that moved effortlessly from one space to another.

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Hero created over 80 inventions. A team at Reading University, England made a model of his "wind ball" which rotated 1500 times a minute. Present day engineers thought it to be ......... as too much steam escaped.

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Hero's famous "......... on Pneumatics" explained how music could be created by driving air through organ pipes. This was the first recorded explanation of the use of air to drive machinery.

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Hero invented automatic temple doors that opened by ......... and contraction of air. Few of his inventions served a practical purpose.

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Another invention was his coin-fed slot machine that delivered water for ritual washing before entering a temple. A coin fell on a ......... beam, activating a splash of water through a valve.

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Despite the few practical inventions, Hero's belief was that the technique was more important than the actual product, and ......... with other engineers was as important as studying philosophy.

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