Machinery Lubrication

Machinery Lubrication November-December 2018

Machinery Lubrication magazine published by Noria Corporation

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Stay Connected With Noria Follow us on Twitter Like us on Facebook Connect with us on LinkedIn /noria-corporation Continue learning with us on YouTube 42 | November - December 2018 | www . 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. B High soot loading is controlled by dispersant additives. This type of additive is polar and is used to disperse soot particles in order to prevent agglomeration. Dispersant additives envelop particles and keep them divided. 2. C This test is extremely simple and inexpensive. It involves placing two drops of used oil on chromatography paper. When the oil makes contact with the absorbent blotter paper, it will wick out into the paper. Once all the oil has moved into the pores of the paper, the blotter is ready to be examined. This test is primarily used to detect the accumulation of particles, soot and organic insolubles such as sludge and other oxida- tion byproducts. It is also a good tool to assess the condition of oil dispersants. 3. B A sample bottle should be fi lled to enable enough agitation by lab personnel to assess the contaminants and wear metal contents. Otherwise, contaminants and wear metal will stay in the bottom of the sample bottle and will not be measured, making the sample unrepresentative. In addition, a sample bottle that is fi lled less than 75 percent may be insuffi cient to perform all the required tests. 1. High soot loading is managed by what additive? A) ZDDP B) Dispersant C) Over-base detergent D) AW/EP E) Demulsifi er 2. The blotter spot test is primarily used to detect: A) Silicone sealant B) Viscosity increase C) Particles, soot and organic insolubles D) Air entrainment E) Spent additives 3. For a typical hydraulic fl uid, how full should a sample bottle be fi lled with hydraulic fl uid? A) 50 percent B) 75 percent C) 90 percent D) 100 percent E) It doesn't matter

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