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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:   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.

Subject: Inventions
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Q:

Who invented FM radio?

A) Edwin Howard Armstrong B) Thomas Alva Edison
C) Graham Bell D) Galileo
 
Answer & Explanation Answer: A) Edwin Howard Armstrong

Explanation:
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Q:

Who invented Radio?

A) Grahambell B) Galileo
C) Marconi D) Edison
 
Answer & Explanation Answer: C) Marconi

Explanation:

Guglielmo Marconi, an Italian invetor invented Radio in 1890's.

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Q:

The credit of inventing the television goes to

A) Philo Farnsworth B) John Logie Baird
C) Charles Francis Jenkins D) None of the above
 
Answer & Explanation Answer: A) Philo Farnsworth

Explanation:

The credit of inventing the television goes to Philo Farnsworth.

The_credit_of_inventing_the_television_goes_to1549279715.jpg image

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Q:

Which among the following is not correctly matched?

A) Parachute: W H carothers B) Barometer: Torricelli
C) Cells: Robert Hooke D) X- Ray: W Roentgen
 
Answer & Explanation Answer: A) Parachute: W H carothers

Explanation:
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Q:

What did Sir William Herschel discover in 1800?

A) Ultraviolet rays B) Infra-red radiation
C) X rays D) Microwaves
 
Answer & Explanation Answer: B) Infra-red radiation

Explanation:

Sir William Herschel discovered Infra-red radiation in 1800.

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Q:

In which country the hormone gibberellin was discovered?

A) India B) Japan
C) China D) Russia
 
Answer & Explanation Answer: B) Japan

Explanation:

The hormone gibberellin was discovered in the country Japan.

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Q:

When was the voting machine invented?

A) 1980 B) 1892
C) 1989 D) 1920
 
Answer & Explanation Answer: B) 1892

Explanation:
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Q:

The credit of inventing the television goes to

A) Philo Farnsworth, B) John Logie Baird
C) Philo Farnsworth D) None of the above
 
Answer & Explanation Answer: B) John Logie Baird

Explanation:

The_credit_of_inventing_television_goes_to1538375217.jpg image

The credit of inventing the television goes to John Logie Baird.

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