Q: What Elmer A. Sperry invented?

1. Gyrocompass
2. Hydroplane
3. Magnetic compass
4. Hydraulic turbine

Q: What Thomas Davenport invented?

1. Screw propellor
2. Sleeping (railway) car
3. Electric streetcar
4. Chesterfield

Q: What George Westinghouse invented?

1. Electric razor
2. Light bulb
3. Railway air brakes
4. Refrigerator

Q: What J. B. Dunlop invented?

1. Rubber boot
2. Pneumatic rubber tire
3. Automobile wheel rim
4. Model airplanes

Q: What Galileo invented?

1. Thermometer
2. Barometer
3. Microscope
4. Pendulum clock

Q: What Sir Isaac Newton invented?

1. Microscope
2. Chronometer
3. Spectacles
4. Reflecting telescope

Q: What James Watt invented?

1. Rotary steam engine
2. Diving bell
3. Hot air balloon
4. Steam boat

Q: What Elisha Otis invented?

1. Escalator
2. Jet engine
3. Elevator
4. Turbine

Q: Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent?

1. Clarinet
2. Banjo
3. Oboe
4. Harmonium

Q: What George Pullman invented?

1. Box car (railway)
2. Sleeping (railway) car
3. Air brakes
4. Airship

Q: What Benjamin Franklin invented?

1. Hygrometer
2. Radio
3. Bifocal spectacles
4. Barometer

Q: What Henry Bessemer invented?

1. Aluminum
2. Steel Converter
3. Steel rolling mill
4. Electroplating