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Inventions Entrance Exam MCQs – Mock Test 29
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Study Dewar Flask Quiz Questions and Answers PDF to master famous inventions. Download the Dewar Flask Quiz with Answers PDF e-Book, Test 29 to learn inventions online courses. Practice Inventions and Inventors Notes questions, Dewar Flask Multiple Choice Questions (MCQ) to master famous inventions. Download the Dewar Flask Learning App: Free Inventions Quiz App to learn ball point, silver photo, traffic light with three colours, dewar flask test prep to strengthen invention remote expertise.
Free Dewar Flask Learning App Download: "First thermos was patented by"; MCQ with answers: sir etienne montgolfier, sir james dewar, sir henri giffard, and sir alfred nobel to master famous inventions. Solve inventions and inventors questions and answers, Google Book to download free chapter to enhance school performance.
MCQ 141: The first thermos was patented by:
MCQ 142: Which one of the following invents the traffic lights with three colors?
MCQ 143: In which one of the following country Silver photo was discovered?
MCQ 144: Which one of the following is an inventor of Ballpoint?
MCQ 145: The first laser was invented by an American engineer named as:
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