• Inventions - Section 1
66. 

What African-American inventor received 5 patents in the field of shoemaking?

A. Elijah McCoy
B.

जान एर्न्स्ट मत्जेलिगेर 

C.

अर्नेस्ट जस्ट 

D.

लेविस लैटिमर 


67. 

It travels over land and water. Who invented the HOVERCRAFT?

A. S. Sperrow
B.

ओ.स्त्रीचेग 

C.

टी.हेनमैन 

D.

सी क्योकेरेल्ल 


68. 

What type of system did Paul Nipkow, John Baird, and Charles Jenkins all invent?

A. Telephone
B.

वार्निंग 

C.

इलेक्ट्रिसिटी 

D.

टेलीविज़न 


69. 

In which decade was the AEEE (now the IEEE) founded?

A. 1850s
B.

1880s

C.

1930s

D.

1950s


70. 

What Sir Isaac Newton invented?

A. Reflecting telescope
B.

ठीक घड़ी

C.

माइक्रोस्कोप

D.

चश्मा