Book 2: 6-31 - "Types of Bearing Lubrication" Flashcards
High operating temperatures can cause premature bearing failure due to:
Select one:
A. The softening of the metal
B. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting
C. Uneven loading of the bearing
D. Cracking or splitting of the bearing race
E. Excessive vibrations
A. The softening of the metal
Anti-friction bearings consist of moving components which “roll” between two surfaces called:
Select one:
A. Grooves
B. Races
C. Valleys
D. Tracks
E. Sleeves
B. Races
Usually the cause of the bearing trouble is one of the following:
Select one:
A. True alignment of shaft and bearing
B. Excessive oil supply
C. Proper viscosity of oil
D. Temperature of oil too low
E. Improper bearing design
E. Improper bearing design
A poor quality lubricant can cause premature bearing failure due to:
Select one:
A. High operating temperatures
B. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting
C. Uneven loading of the bearing
D. Cracking or splitting of the bearing race
E. Indentations in the surfaces in contact with the balls or rollers
B. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting
Misalignment can cause premature bearing failure due to:
Select one:
A. Uneven loading of the bearing
B. High operating temperatures
C. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting
D. Indentations in the surfaces in contact with the balls or rollers
E. Cracking or splitting of the bearing race
A. Uneven loading of the bearing
Usually the cause of the bearing trouble is one of the following:
Select one:
A. Proper viscosity of oil
B. Excessive oil supply
C. Temperature of oil too low
D. Misalignment of shaft and bearing
E. Proper bearing design
D. Misalignment of shaft and bearing
One of the first signs of a failing bearing is:
Select one:
A. Unusual noises
B. A drop in oil pressure
C. A rise in its operating temperature
D. A drop in its operating temperature
E. Knocking
C. A rise in its operating temperature
A more suitable design of thrust bearing has the bearing surfaces in the form of pads, in which
Select one:
A. The thrust collar tilts against against a stationary surface
B. The pads are free to tilt
C. The pads press against each other in opposite directions
D. The thrust collar does not revolve
E. There is no room for an oil wedge to form
B. The pads are free to tilt
Shell, sleeve or journal bearings are usually constructed with a _____ lining, commonly called Babbitt, carried on a cast iron or steel housing.
Select one:
A. Brass-metal alloy
B. White-metal alloy
C. Aluminum-metal alloy
D. Lead-metal alloy
E. Bronze-metal alloy
B. White-metal alloy
The Babbitt is suitable for the lining because it:
Select one:
A. Is very easily corroded
B. Is hard enough to allow foreign particles to become embedded
C. Comparative softness allows it to “wear in” to a smooth condition
D. Will not yield or deform to load condition
E. Allows scoring of the shaft
C. Comparative softness allows it to “wear in” to a smooth condition
Bearings can withstand operating temperatures up to:
Select one:
A. 90°C (194°F)
B. 85°C (185°F)
C. 150°C (302°F)
D. 120°C (248°F)
E. 200°C (392°F)
D. 120°C (248°F)
Usually the cause of the bearing trouble is one of the following:
Select one:
A. Proper viscosity of oil
B. Proper bearing design
C. True alignment of shaft and bearing
D. Excessive oil supply
E. Loss of bearing metal due to corrosion or metal fatigue
E. Loss of bearing metal due to corrosion or metal fatigue
Improper fitting can cause premature bearing failure due to:
Select one:
A. High operating temperatures
B. The force applied indenting or nicking the balls or rollers
C. Uneven loading of the bearing
D. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting
E. Cracking of the rollers
B. The force applied indenting or nicking the balls or rollers
All of the following are steps in a procedure for cleaning a bearing without dismantling it except:
Select one:
A. Then a light lubricating oil is sprayed into the bearing
B. The end covers are replaced
C. After removing the end covers, a solvent can be sprayed into the end cover to flush out old lubricant and sludge
D. Make sure all dirt has been removed from the outside of the bearing and the surrounding parts
E. The bearing refilled with the normal lubricant, either oil or grease as the case may be
C. After removing the end covers, a solvent can be sprayed into the end cover to flush out old lubricant and sludge
(lousy question, all are steps in the procedure on page 31-6 of textbook.
The order is: D, C, A, B, E)
If the parallel rollers are quite long, the common term for these is _____ bearings.
Select one:
A. Pin
B. Shell
C. Needle
D. Sleeve
E. Journal
C. Needle
