41.

Who among the following invented the small pox vaccine?
A. Robert Koch B. Edward Jenner
C. Robert Hooke D. Louis Pasteur
Answer and Explanation
Answer:B
Explanation: No answer description available for this question.
42.

What George Westinghouse invented?
A. Light bulb B. Electric razor
C. Refrigerator D. Railway air brakes
Answer and Explanation
Answer:D
Explanation: Invented in 1868.
43.

Who is the only U.S. President to invent and patent something?
A. Abraham Lincoln B. Theodore Roosevelt
C. Thomas Jefferson D. Rutherford B. Hayes
Answer and Explanation
Answer:A
Explanation: In 1849 Honest Abe invented a method to aid ships that got stuck on sandbars. He called it A Device for Buoying Vessels Over Shoals. It was never used.
44.

What invention is credited to the Russian born American inventor Vladimir Kosma Zworykin?
A. Telegraph B. Radio
C. Television D. Dishwasher
Answer and Explanation
Answer:C
Explanation: Zworykin invented both the tube (iconoscope) for transmission and the receiver (kinescope) in 1923 and 1924, respectively.
45.

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?
A. Banjo B. Oboe
C. Clarinet D. Harmonium
Answer and Explanation
Answer:D
Explanation: Ben also holds a lot of firsts - first U.S. ambassador, first political cartoonist, first American philosopher, organized the first fire department, and on and on.