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Inventions Placement Tests: Certification Test 49

Refrigeration system Notes App Download & PDF e-Book - 49

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MCQ: 49

The very first system for refrigerating water to produce ice was developed by

  1. Sir Rudolph Diesel
  2. Sir Josef
  3. Sir Etienne Montgolfier
  4. John Gorric
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Refrigeration system Placement Tests: Inventions App & eBook Notes

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Refrigeration system Notes App (iOS & Android)

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General Knowledge Notes App

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8th Class Science Test Questions

8th Class Science Quiz with Answers