General Knowledge MCQs – Practice Test 24 (Chapter 14)
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MCQ 116: Earliest cast iron was developed in China in
MCQ 117: In 1918, hydraulic brake which replaced mechanical brake was invented by
MCQ 118: Primary inventor of the carbon-filament light bulb is
MCQ 119: Toggle light switch was patented by Morris Goldberg and William John Newton in
MCQ 120: In 1834, first combine harvester was invented by
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