• Inventions - Section 1
31. 

What George Westinghouse invented?

A. Light bulb
B. विद्युत उस्तरा
C. फ्रिज
D. रेलवे हवा ब्रेक

32. 

Who is the only U.S. President to invent and patent something?

A. Abraham Lincoln
B. थियोडोर रूजवेल्ट
C. थॉमस जेफरसन
D. रदरफोर्ड बी हेस

33. 

What invention is credited to the Russian born American inventor Vladimir Kosma Zworykin?

A. Telegraph
B.

रेडियो

C.

टेलीविजन

D.

बर्तन साफ़ करने वाला


34. 

Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent?

A. Banjo
B. ओबाउ
C. शहनाई
D. हरमोनियम बाजा

35. 

What Thomas Davenport invented?

A. Screw propellor
B. इलेक्ट्रिक ट्राम
C. चेस्टफ़ील्ड
D. सोनेवाली (रेलवे) कार