www.machinerylubrication.com
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July - August 2017
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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. D
The off-line (kidney-loop) system is normally connected to the oil reservoir where
most of the dirt accumulates.
2. B
It varies throughout the system because of the many components included. For
example, the concentration of wear debris after the filter will be much less than
before the filter.
3. A
This is due to the delicate components of hydraulic systems such as servo valves
and the fact that contaminant sensitivity increases disproportionally to pressure.
1. The best location for a filter to achieve low-cost
dirt removal is:
A) At the suction side of the pump
B) After the pump in the pressure line
C) In the return line
D) In an off-line (kidney-loop) system
E) No specific location has any advantage
2. The concentration of wear debris:
A) Always increases throughout the oil circulating system
B) Varies throughout the oil circulating system
C) Always decreases throughout the oil circulating system
D) Is constant throughout the oil system
E) Varies with the pressure in the oil system
3. Which component generally requires the cleanest oil?
A) High-pressure hydraulics
B) Gears
C) Engines
D) Turbines
E) Journal bearings
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