General Knowledge MCQs – Practice Test 22 (Chapter 14)
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Free Technology Inventions MCQ App Download (Android & iOS): In 1642, first mechanical calculator was built by; MCQ with answers: stephen hales, thomas newcomen, blaise pascal, and gerardus mercator. Practice Permanent Court of Arbitration Quiz Questions, download Apple Book (Free Chapter) to improve learning performance.
MCQ 106: Earliest cast iron was developed in
MCQ 107: In 1642, first mechanical calculator was built by
MCQ 108: Device which measure the magnitude and direction of magnetic fields is known as
MCQ 109: First pressure sensitive adhesive tape was invented in 1845 by
MCQ 110: World's first refrigerator was invented by
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