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 Inventions Questions

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Q:

When were bar code scanners invented?

A) 1940s B) 1950s
C) 1960s D) 1970s
 
Answer & Explanation Answer: D) 1970s

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Q:

Stethoscope was invented by

A) Bessemer B) Rane Laennec
C) Henry Becquarrel D) none of these
 
Answer & Explanation Answer: B) Rane Laennec

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Q:

In which year was the first solid state integrated circuit demonstrated?

A) 1970s B) 1960s
C) 1950s D) 1980s
 
Answer & Explanation Answer: C) 1950s

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Q:

Who Invented Modern Frequency Modulation FM Radio ?

A) Peter Durand B) Percy Shaw
C) Edwin H. Armstrong D) Leo Hendrik Baekeland
 
Answer & Explanation Answer: C) Edwin H. Armstrong

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Q:

Who Invented Microwave Oven ?

A) Lewis Edson Waterman B) Levi Strauss
C) Percy LeBaron Spencer D) Sir Sandford Fleming
 
Answer & Explanation Answer: C) Percy LeBaron Spencer

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Q:

When was Barb Wire patented

A) 1898 B) 1868
C) 1874 D) 1866
 
Answer & Explanation Answer: C) 1874

Explanation:

Joseph F. Glidden - Father of Barbed Wire.

      • Glidden was born in New York in 1812. He invented Barbed Wire in 1873 and was granted the patent on Nov. 24, 1874. After a three year battle over the patent, which he eventually won received a patent for the modern invention in 1874 after he made his own modifications to previous versions.
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10 3439
Q:

Which is an invention that improved safety for railway passengers?

A) Air brakes B) Refrigerated rail cars
C) Time standardization D) Pullman sleeping cars
 
Answer & Explanation Answer: A) Air brakes

Explanation:

An invention that improved safety for railway passengers is Air brakes. With the use of air brakes using compressed air, become more effective by preventing many train accidents.

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0 3339
Q:

Roentgen discovered

A) Electrocardiograph B) X–rays
C) Anti polio vaccine D) Encephalograph
 
Answer & Explanation Answer: B) X–rays

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