Chapter 14: General Knowledge Exam Tests
General Knowledge MCQs - Chapter 14
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MCQ : Earliest cast iron was developed in
MCQ 1: In 1642, first mechanical calculator was built by
MCQ 2: Device which measure the magnitude and direction of magnetic fields is known as
MCQ 3: First pressure sensitive adhesive tape was invented in 1845 by
MCQ 4: World's first refrigerator was invented by
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