Inventions Practice Test 99
helium Quiz PDF: Questions and Answers - 99
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The MCQ Quiz: In which one of the following year, the helium extract process from natural gas was invented; "helium" App Download (Android & iOS) Free with answers 1940, 1915, 1910 and 1950 for free online classes. Study inventions and inventors questions and answers, Apple Book to download free sample for distance learning classes.
helium Questions and Answers PDF Download: Quiz 99
MCQ 491: In which one of the following year, the helium extract process from natural gas was invented?
- 1915
- 1940
- 1910
- 1950
MCQ 492: In which country the first mechanical calculator was invented?
- U.S.A
- Canada
- Italy
- China
MCQ 493: In which one of the following year, a Clarinet was patented?
- 1689
- 1602
- 1612
- 1690
MCQ 494: In which one of the following year, 3 D map-making system was introduced?
- 1923
- 1933
- 1910
- 1957
MCQ 495: In which one of the following year, Tungsten Wire was invented?
- 1901
- 1923
- 1906
- 1989
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