Machinery Lubrication

Machinery Lubrication May - June 2018

Machinery Lubrication magazine published by Noria Corporation

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44 | May - June 2018 | www . 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 ANSWERS 1. C Grease consistency is the ability of grease to resist deformation by an applied mechanical force (cone penetrometer). The higher the cone penetration, the softer the grease and vice versa. 2. A Oil oxidation is the reaction of oil hydrocarbons with oxygen. It shortens the life of the oil and results in the formation of acids and sludge. The oxidation rate increases as the temperature increases. For every 18 degrees F (10 degrees C), the oxidation rate is doubled and the life of the oil is cut in half (Arrhenius rate rule). Therefore, "A" is the correct answer. 3. B This information represents the Society of Automotive Engineers (SAE) viscosity grade. 1. A cone penetrometer is used to measure what? A) Dropping point B) Remaining useful life C) Grease consistency D) Oxidation stability of grease E) Bleed characteristics 2. Which is not correct related to oxidation? A) Is the reaction of oxygen with water to form acids B) Creates acid and sludge C) Occurs at all oil temperatures but becomes significant above 60 degrees C (150 degrees F) D) Is the reaction of oil hydrocarbons with oxygen E) Shortens oil life 3. The information in the center of the API "donut" symbol on motor oil containers represents what? A) Service classification B) Viscosity grade C) Energy-conserving capabilities D) AW additive E) Base oil type

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