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Q:

The first large scale electrical air conditioning was invented and used in 1902 by

A) Willis Carrier B) John Gorrie
C) Stuart Cramer D) H.H. Schultz
 
Answer & Explanation Answer: A) Willis Carrier

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Q:

Who invented first working laser?

A) A. H. Taylor B) W. K. Roentgen
C) T. H. Maiman D) Fred Morrission
 
Answer & Explanation Answer: C) T. H. Maiman

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Q:

Who discovered Electron?

A) Enrico Fermi B) Robert Noyce
C) J.J.Thomson D) James Dyson
 
Answer & Explanation Answer: C) J.J.Thomson

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Q:

What was invented by Zacharias Jansen?

A) Jet Engine B) Radium
C) Microscope D) Electric Lamp
 
Answer & Explanation Answer: C) Microscope

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Q:

Who invented the Centigrade scale?

A) Anders Celsius B) Daniel Gabriel Fahrenheit
C) William Thomson D) Wright Brothers
 
Answer & Explanation Answer: A) Anders Celsius

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Q:

Who Invented Lawnmower?

A) Edwin Howard Armstrong B) John Barber
C) Edwin Beard Budding D) Nicholas Callan
 
Answer & Explanation Answer: C) Edwin Beard Budding

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Q:

Albert Sabin is known for developing _____.

A) smallpox vaccine B) polio vaccine
C) penicillin D) hepatitis B vaccine
 
Answer & Explanation Answer: B) polio vaccine

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Q:

Who invented logarithms?

A) Eden Snowden B) Larry Page
C) Thomas Edison D) John Napier
 
Answer & Explanation Answer: D) John Napier

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