Inventions Practice Test 58
Slot Machines Quiz Questions and Answers PDF - 58
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The Quiz: In which one of following year, mechanical slot machines were patented; "Slot Machines" App Download (Free) with answers: 1895; 1874; 1806; 1844; for online courses. Solve inventions and inventors questions and answers, Amazon eBook to download free sample for distance learning.
Slot Machines Questions and Answers PDF Download: Quiz 58
In which one of the following year, mechanical slot machines were patented?
- 1874
- 1895
- 1806
- 1844
Bunsen burners were patented by
- Sir Walter E.Diemer
- Sir Robert Bunsen
- Sir Willem Kloff
- Sir John Biggins
Dental braces were invented in
- 1728
- 1723
- 1788
- 1734
Tranquilizer gun was invented by a New Zealand veterinarian named as
- Sarah Boone
- Sir Colin Albert Murdoch
- John Loudon McAdam
- Dr Raymond Lemieux
The first petrol engine was invented by a German engineer named as
- Sir Nickolaus August Otto
- Sir Jack Kilby
- Sir Robert Noyce
- Sir Paul Cornu
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