This monTh, MaCHINEry LuBrICaTION conTinues
iTs "TesT Your KnowLedge" secTion in which we
focus on a group of questions from noria's practice 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 practice test with expanded answers is
available at store.noria.com.
TesT YoUr knoWleDge
Answers:
1. B
This procedure involves mixing toluene solvent with oil and then adding sulfuric acid and
a reagent. The glycol is converted to formaldehyde, and the concentration is estimated by
colorimetry.
2. A
Although silt particles are very small, they are more harmful to system components than
particles that are larger than the components' internal clearances. This is because silt parti-
cles are abrasive. When built up over time, they cause erosion, abrasion and valve sticking.
3. B
Dedicated containers can prevent cross-contamination that may result from using different
oil types. Using sealable containers helps stop foreign particles from entering the oil system.
1. Glycol antifreeze field test kits:
A) Determine glycol by density
B) Determine glycol by a chemical color change
C) Determine glycol by FTIR
D) Determine glycol by viscosity
E) Determine glycol by a change in smell
2. Silt-size particles (5 microns and smaller) influence
reliability by:
A) Causing erosion, valve sticking and abrasion
B) Causing surface softening
C) Silt is too small and does not affect
machine reliability
D) Doesn't affect reliability because silt will
always be removed by the filter system
E) Doesn't affect reliability because silt
particles will settle out in the reservoir
3. Best practices for top-up oil containers could include:
A) Closeable galvanized containers
B) Dedicated and sealable containers by oil type
C) Any available container will be satisfactory
D) Lubricants should be stored at the machinery location regardless
of the cleanliness
E) Use a funnel that contains a screen in the bottom to catch contaminants
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www.machinerylubrication.com
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September - October 2014
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