Exercise 1

Question 11 :

Who invented Jet Engine?

A). Sir Frank Whittle
B). Gottlieb Daimler
C). Roger Bacon
D). Lewis E. Waterman
Answer : Option A

Explanation :

Dr. Hans von Ohain and Sir Frank Whittle are recognized as the co-inventors of the jet engine. Each was working separately and knew nothing of the others work. Although Whittle started first, von Ohain was first to design and develop a turbojet engine to power an aircraft.

Of the many honors received by both, the most significant honor was probably "The Charles Draper Prize" in 1992 which was given to both Hans von Ohain and Sir Frank Whittle for their efforts and contributions to aviation and mankind. "The Charles Draper Prize" is recognized as the equivalent to the Nobel Prize in technology.

Question 12 :

What invention caused many deaths while testing it?

A). Dynamite
B). Ladders
C). Race cars
D). Parachute
Answer : Option D

Explanation :

Many people who tried to test the first parachutes died by jumping from high places. One attempt was a parachute hat, but the inventor broke his neck while testing it. The first successful parachute was tested from a hot air balloon in 1797, in France, by Jacques Garnerin.

Question 13 :

Who invented Gunpowder?

A). G. Ferdinand Von Zeppelin
B). Sir Frank Whittle
C). Roger Bacon
D). Leo H Baekeland
Answer : Option C

Question 14 :

Until Victorian times, chocolate was thought of as a drink. When did the first chocolate bar appear?

A). 1828
B). 1831
C). 1825
D). There is no sure date
Answer : Option D

Explanation :

No one knows for sure when the first chocolate bar appeared or even who made it, but an important event occurred in 1828. The Van Houten press was invented, which extracted cocoa butter from the bean - the same press that brought the Cadbury Brothers success with Cocoa Essence.

Question 15 :

In which decade was the telephone invented?

A). 1850s
B). 1860s
C). 1870s
D). 1880s
Answer : Option C

Explanation :

Alexander Graham Bell's notebook entry of 10 March 1876 describes his successful experiment with the telephone. Speaking through the instrument to his assistant, Thomas A. Watson, in the next room, Bell utters these famous first words, "Mr. Watson -- come here -- I want to see you".