HomeGeneral KnowledgeWhat Elmer A. Sperry invented? 4810. What Elmer A. Sperry invented?By Admin / September 19, 2025 A. Hydroplane B. Hydraulic turbine C. Magnetic compass D. Gyrocompass ✅ The correct answer is option D. Invented in 1911.
1. In which field is the Dhanwantri Award given? Leave a Comment / Awards and Honours MCQs, General Knowledge / By Admin
2. Which of the following awards was conferred on Mrs. Kiran Bedi? Leave a Comment / Awards and Honours MCQs, General Knowledge / By Admin