Inventions Practice Test 73
WD-40 Quiz Questions and Answers PDF - 73
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The WD-40 Quiz Questions and Answers PDF (WD-40 Quiz with Answers PDF e-Book) download Test 73 to learn inventions online courses. Practice Inventions and Inventors trivia questions, WD-40 Multiple Choice Questions (MCQ) for online college degrees. The WD-40 Quiz App Download: Free learning app for digital camera, modern-day design helicopter, christmas lights, electron tubes, wd-40 test prep for online elementary school classes.
The Quiz: WD-40 was patented by; "WD-40" App Download (Free) with answers: Sir John Fitch; Sir Nikolaus Otto; Sir John Barber; Sir Norn Larsen; for online certificate courses. Solve inventions and inventors questions and answers, Amazon eBook to download free sample for distance learning.
WD-40 Questions and Answers PDF Download: Quiz 73
WD-40 was patented by
- Sir Nikolaus Otto
- Sir John Fitch
- Sir John Barber
- Sir Norn Larsen
Electron tubes were invented by
- Sir Henry W. Seelay
- Sir Schuyler Skaats Wheeler
- Sir Samuel W. Francis
- Sir John Ambrose
The first Christmas lights were lit by the use of electricity in
- 1877
- 1882
- 1851
- 1862
In which one of the following dates World first practical helicopter took flight?
- 1888
- 1939
- 1760
- 1952
The first self-contained digital camera was invented in
- 1975
- 1989
- 1999
- 1956
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