99+ List of Inventions and Inventors Quiz Questions and Answers with Explanation

Q:

Who Invented Elevator Safety Brake ?

A) Alfred Bernhard Nobel	B) Elisha Graves Otis
C) Percy LeBaron Spencer	D) Garrett Augustus Morgan

Answer & Explanation Answer: B) Elisha Graves Otis

Explanation:

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Q:

Who Discovered The Nucleus of a Cell?

A) Otto Hahn	B) John Dalton
C) Robert Brown	D) Marie Curie

Answer & Explanation Answer: C) Robert Brown

Explanation:

Robert Brown, Scottish botanist, Discovered The Nucleus of a Cell in 1831, London. When Brown was studying orchids under microscope when he observed an opaque area, which he called the "Areola" or "Nucleus", in the cells of the flower's outer layer.

The nucleus was also described by Franz Bauer in 1804 but in detail Robert Brown made it in 1831.

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Q:

Who is the inventor of railway engine?

A) George Stephenson	B) W.H.F Tablot
C) Richard Trevithik	D) Eli Whitney

Answer & Explanation Answer: C) Richard Trevithik

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Q:

Which object, initially called the 'Whirlwind', was invented by Ives McGaffey in 1869 ?

A) Washing machine	B) Electric mixer
C) Vacuum cleaner	D) Blender

Answer & Explanation Answer: C) Vacuum cleaner

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Q:

The value of $(\sin^{0} + \cos 0)^{2} =$

A) 1+sin20	B) sin20 +cos20
C) 1+ 2cos0sin0	D)

Answer & Explanation Answer: D)

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Q:

Who is the inventor of railway engine?

A) George Stephenson	B) W.H.F Talbot
C) Richard Trevithik	D) Eli Whitney

Answer & Explanation Answer: C) Richard Trevithik

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1 3453

Q:

What Thomas Davenport invented?

A) Screw propellor	B) Electric streetcar
C) Chesterfield	D) Sleeping (railway) car

Answer & Explanation Answer: A) Screw propellor

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1 3428

Q:

Who invented Electrocardiograph(EKG)?

Answer

The EKG was invented by Willem Einthoven in 1903 and is used to monitor and analyze past and present heart activity in an individual.

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