Q: What Elmer A. Sperry invented?

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

Q: What Thomas Davenport invented?

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

Q: What George Westinghouse invented?

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

Q: What J. B. Dunlop invented?

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

Q: What Galileo invented?

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

Q: What Sir Isaac Newton invented?

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

Q: What James Watt invented?

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

Q: What Elisha Otis invented?

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

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. Oboe
2. Harmonium
3. Clarinet
4. Banjo

Q: What George Pullman invented?

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

Q: What Benjamin Franklin invented?

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

Q: What Henry Bessemer invented?

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