General Knowledge Certification MCQs – Practice Test 27 (Chapter 14)
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MCQ 131: Earliest version of Cathode Ray Tube was invented in
MCQ 132: Adhesive bandage which is popularly known as Band Aid was invented by
MCQ 133: Nickel zinc battery which is used in digital cameras and cordless telephone was invented by
MCQ 134: First steam engine builds to pump water by Thomas Newcomen in
MCQ 135: Transistors used in all modern electric products was invented in
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