16.

In which decade was the telephone invented?

A. 1850s B. 1860s
C. 1870s D. 1880s
Answer:C
Explanation: Alexander Graham Bell's notebook entry of 10 March 1876 describes his successful experiment with the telephone. Speaking through the instrument to his assistant, Thomas A. Watson, in the next room, Bell utters these famous first words, "Mr. Watson -- come here -- I want to see you".

17.

Who perfected GENETIC ENGINEERING?

A. Cohen & Boyer B. Hunt & Davids
C. Sinclair & Roberts D. Jaysson & Simons
Answer:A
Explanation: Genetic Engineering, the technique of DNA cloning was perfected by Stanley Cohen and Herbert Boyer in 1973.

18.

What now-ubiquitous device was invented by Zenith engineer Eugene Polley in 1955?

A. Microwave oven B. Remote control
C. VCR D. Calculator
Answer:B
Explanation: The first wireless remote control for television was called Flashmatic. (Remember when you had to get up to change the channel?)

19.

What Benjamin Franklin invented?

A. Bifocal spectacles B. Radio
C. Barometer D. Hygrometer
Answer:A
Explanation: Invented in 1760. A list of Benjamin Franklin's inventions reveals a man of many talents and interests. It was the scientist in Ben that brought out the inventor. His natural curiosity about things and the way they work made him try to find ways to make them work better. Ben had poor vision and needed glasses to read. He got tired of constantly taking them off and putting them back on, so he decided to figure out a way to make his glasses let him see both near and far. He had two pairs of spectacles cut in half and put half of each lens in a single frame. Today, we call them bifocals.

20.

What Benjamin Franklin invented?

A. Bifocal spectacles B. Radio
C. Barometer D. Hygrometer
Answer:A
Explanation: Invented in 1760. A list of Benjamin Franklin's inventions reveals a man of many talents and interests. It was the scientist in Ben that brought out the inventor. His natural curiosity about things and the way they work made him try to find ways to make them work better. Ben had poor vision and needed glasses to read. He got tired of constantly taking them off and putting them back on, so he decided to figure out a way to make his glasses let him see both near and far. He had two pairs of spectacles cut in half and put half of each lens in a single frame. Today, we call them bifocals.