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Inventions MCQs (Grade 8) From Textbook

Inventions MCQs – Mock Test 73

WD-40 Quiz with Answers PDF Download – Test 73

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WD-40 Quiz – Mock Test 73 PDF Download

MCQ 361: WD-40 was patented by:

  1. Sir Nikolaus Otto
  2. Sir John Fitch
  3. Sir John Barber
  4. Sir Norn Larsen

MCQ 362: Electron tubes were invented by:

  1. Sir Henry W. Seelay
  2. Sir Schuyler Skaats Wheeler
  3. Sir Samuel W. Francis
  4. Sir John Ambrose

MCQ 363: The first Christmas lights were lit by the use of electricity in:

  1. 1877
  2. 1882
  3. 1851
  4. 1862

MCQ 364: In which one of the following dates World first practical helicopter took flight?

  1. 1888
  2. 1939
  3. 1760
  4. 1952

MCQ 365: The first self-contained digital camera was invented in:

  1. 1975
  2. 1989
  3. 1999
  4. 1956

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