Class 8 Courses

Inventions Quizzes

Inventions Practice Test 29

Dewar Flask Multiple Choice Questions (MCQs) PDF - 29

The Dewar Flask Multiple Choice Questions (MCQs) and Answers PDF (Dewar Flask MCQs PDF e-Book) download Test 29 to study inventions online courses. Solve Inventions and Inventors MCQ trivia questions, Dewar Flask Multiple Choice Questions (MCQ) for online college degrees. The Dewar Flask MCQs App Download: Free educational app for laser, ball point, silver photo, traffic light with three colours, dewar flask test prep for online elementary school classes.

The MCQs: First thermos was patented by; "Dewar Flask" App (Android, iOS) with answers: Sir Etienne Montgolfier; Sir James Dewar; Sir Alfred Nobel; Sir Henri Giffard; for school certificate. Practice inventions and inventors questions and answers, Google eBook to download free sample for online education.

Dewar Flask Questions and Answers PDF Download: Quiz 29

MCQ 141:

The first thermos was patented by

  1. Sir James Dewar
  2. Sir Etienne Montgolfier
  3. Sir Alfred Nobel
  4. Sir Henri Giffard
MCQ 142:

Which one of the following invents the traffic lights with three colors?

  1. Sir William Potts
  2. Dr Dennis Colonello
  3. Dr Larry wang
  4. Sir Norman Rolston
MCQ 143:

In which one of the following country Silver photo was discovered?

  1. France
  2. Netherlands
  3. Australia
  4. America
MCQ 144:

Which one of the following is an inventor of Ballpoint?

  1. Sir Laszlo Biro
  2. Sir John J. Loud
  3. Sir Michael Faraday
  4. both a and b
MCQ 145:

The first laser was invented by an American engineer named as

  1. Sind ibn Ali
  2. Ibraim al Fazari
  3. Sir Theodore Maiman
  4. Sir Steven Sasson

Mock Tests: Inventions Course Prep

Dewar Flask Learning App: Free Download Android & iOS

The App: Dewar Flask MCQs App to learn Dewar Flask Textbook, Inventions MCQ App, and Technical Writing MCQs App. The "Dewar Flask" App to free download iOS & Android Apps includes complete analytics with interactive assessments. Download App Store & Play Store learning Apps & enjoy 100% functionality with subscriptions!

Dewar Flask App (Android & iOS)

Dewar Flask App (Android & iOS)

Inventions App (Android & iOS)

Inventions App (iOS & Android)

Technical Writing App (Android & iOS)

Technical Writing App (Android & iOS)

Marine Pollution App (Android & iOS)

Marine Pollution App (iOS & Android)