Machinery Lubrication

Machinery Lubrication Jan-Feb 2021

Machinery Lubrication magazine published by Noria Corporation

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Stay Connected With Noria Social icon Rounded square Only use blue and/or white. For more details check out our Brand Guidelines. Follow us on Twitter Like us on Facebook Connect with us on LinkedIn /noria-corporation Continue learning with us on YouTube TEST YOUR KNOWLEDGE This month, Machiner y Lubrication continues it s " Test Your Knowledge" sec tion in which we focus on a group of questions from Noria's Prac tice Exam for Level I Machine Lubrication Technician and Machine Lubricant Analyst. The answers are located at the bottom of this page. The complete 126-question prac tice test with expanded answers is available at and in the Noria Academy app provided with many of Noria's training courses . ANSWERS 1. A Elastohydrodynamic lubrication is a form of hydrodynamic lubrication (full-film separation). It is called elastohydrodynamic because the lubricated components deform elastically due to high pressure. 2. C This ISO cleanliness level (ISO 21/19/16) is considered quite high. Contamination normally takes place during blending, packaging, storing, transportation, etc. End users are responsible for checking the quality of incoming oils and taking measures to ensure clean oil is used, especially in machines that require very clean oil. 3. C In hydrolysis, the additives react with water in the presence of heat to form byproducts such as sulfuric acid and hydrogen sulfides. 1. Which type or form of lubrication is considered to provide a full fluid (oil) film? A) Elastohydrodynamic B) Solid Film C) Boundary D) Mixed E) All of the above 2. A typical ISO cleanliness code for new oil would be? A) 9/7/5 B) 14/12/10 C) 21/19/16 D) 27/25/21 E) 32/30/27 3. Hydrolysis is the breakdown of additives by: A) Hydrogen B) Helium C) Water D) Filtration E) Hydrogen embitterment www . | January - February 2021 | 27

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