Machinery Lubrication

Machinery Lubrication Jan-Feb 2018

Machinery Lubrication magazine published by Noria Corporation

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32 | January - February 2018 | www . machinerylubrication.com 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 https://twitter.com/NoriaCorp Like us on Facebook http://www.facebook.com/noriacorp Connect with us on LinkedIn https://www.linkedin.com/company /noria-corporation Continue learning with us on YouTube http://www.youtube.com/user/noriacorp 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 store.noria.com. ANSWERS 1. D Wear is the primary cause of machinery replacement. Surface degradation of the metal includes all types of wear such as abrasion, adhesion, erosion, corrosion, etc. 2. C This will help assess the actual condition of the oil and the engine before the contami- nants and wear metals are captured by the filter. 3. C EHL occurs in systems where the contact area is small and the pressure is high, such as rolling-element bearings, gears (at the pitch line) and cams. The mating surfaces deform elastically to enlarge the contact area, which is why it is called elastohydrody- namic lubrication. 1. The primary reason that machinery is replaced is due to: A) Erosion B) Accidents C) Obsolescence D) Surface degradation of the metal E) Corrosion 2. Sampling crankcase oil from an engine should be done: A) rough the dipstick hole with a drop-tube B) From a valve mounted after the pump and after the filter with the engine running C) From a valve mounted after the pump, before the filter with the engine running D) From a valve mounted after the pump, before the filter with the engine shut off E) From the drain plug 3. Elastohydrodynamic lubrication (EHL) is considered to occur primarily in: A) Piston rings and liners B) Journal bearings C) Rolling bearings, gears and cams D) Slow-moving pins and bushings E) Worm gears

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