Inventions Quizzes
Inventions Practice Test 29
The Dewar Flask Multiple Choice Questions (MCQs) and Answers PDF (Dewar Flask MCQs PDF e-Book) download Test 29 to study inventions online courses. Solve Inventions and Inventors MCQ trivia questions, Dewar Flask Multiple Choice Questions (MCQ) for online college degrees. The Dewar Flask MCQs App Download: Free educational app for laser, ball point, silver photo, traffic light with three colours, dewar flask test prep for online elementary school classes.
The MCQs: First thermos was patented by; "Dewar Flask" App (Android, iOS) with answers: Sir Etienne Montgolfier; Sir James Dewar; Sir Alfred Nobel; Sir Henri Giffard; for school certificate. Practice inventions and inventors questions and answers, Google eBook to download free sample for online education.
The first thermos was patented by
Which one of the following invents the traffic lights with three colors?
In which one of the following country Silver photo was discovered?
Which one of the following is an inventor of Ballpoint?
The first laser was invented by an American engineer named as
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