Chapter 31 Types of Bearing Lubrication

Question 1

1. Improper fitting can cause premature bearing failure due to:
   A. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting
   B. The force applied indenting or nicking the balls or rollers
   C. Uneven loading of the bearing
   D. High operating temperatures
   E. Cracking of the rollers

Answer 1

B. The force applied indenting or nicking the balls or rollers

Question 2

2. A simple type of thrust bearing known as a collar thrust bearing.
   A. Has the collars separate from the shaft
   B. Has only a small part of the collar area pressing against the bearing surface
   C. Has sufficient room for an oil wedge to be formed
   D. Can only carry a limited load
   E. Uses the boundary type lubrication

Answer 2

E. Uses the boundary type lubrication

Question 3

3. False brinelling can cause premature bearing failure due to:
   A. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting
   B. Cracking or splitting of the bearing race
   C. Uneven loading of the bearing
   D. Excessive vibrations
   E. Indentations in the surfaces in contact with the balls or rollers

Answer 3

D. Excessive vibrations

Question 4

4. High operating temperatures can cause premature bearing failure due to:
   A. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting
   B. Cracking or splitting of the bearing race
   C. Uneven loading of the bearing
   D. Excessive vibrations
   E. The softening of the metal

Answer 4

E. The softening of the metal

Question 5

5. Usually the cause of the bearing trouble is one of the following:
   A. Proper viscosity of oil
   B. Proper bearing design
   C. True alignment of shaft and bearing
   D. Loss of bearing metal due to corrosion or metal fatigue
   E. Excessive oil supply

Answer 5

D. Loss of bearing metal due to corrosion or metal fatigue

Question 6

6.	Usually the cause of the bearing trouble is one of the following:
A.	Proper viscosity of oil
B.	Proper bearing design
C.	True alignment of shaft and bearing
D.	Excessive oil supply
E.	Temperature of oil too high

Answer 6

E. Temperature of oil too high

Question 7

7.	Usually the cause of the bearing trouble is one of the following: 
A.	Proper viscosity of oil
B.	Proper bearing design
C.	True alignment of shaft and bearing
D.	Temperature of oil too low
E.	Loss of oil supply

Answer 7

E. Loss of oil supply

Question 8

8.	Usually the cause of the bearing trouble is one of the following: 
A.	Improper viscosity of oil 
B.	Proper bearing design
C.	True alignment of shaft and bearing
D.	Temperature of oil too low
E.	Excessive oil supply

Answer 8

A. Improper viscosity of oil

Question 9

9. A more suitable design of thrust bearing has the bearing surfaces in the form of pads, in which:
   A. The pads are free to tilt
   B. The pads press against each other in opposite directions
   C. there is no room for an oil wedge to form
   D. the thrust collar does not revolve
   E. the thrust collar tilts against against a stationary surface

Answer 9

A. The pads are free to tilt

Question 10

10.	One of the first signs of a failing bearing is: 
A.	Unusual noises
B.	Knocking
C.	A drop in its operating temperature
D.	A rise in its operating temperature
E.	A drop in oil pressure

Answer 10

D. A rise in its operating temperature

Question 11

11.	If the bearing can be easily replaced, such as in a car engine, it is termed a \_\_\_\_\_ type.
A.	Ball
B.	Roller
C.	Sleeve
D.	Journal
E.	Shell

Answer 11

E. Shell

Question 12

12. A poor quality lubricant can cause premature bearing failure due to:

A. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting
B. Cracking or splitting of the bearing race
C. Uneven loading of the bearing
D. High operating temperatures
E. Indentations in the surfaces in contact with the balls or rollers

Answer 12

A. Hard pieces of lubricant being pressed into the bearing surfaces producing flaking and pitting

Question 13

13. Bearings can withstand operating temperatures up to:

A.	120°C (248°F)
B.	150°C (302°F)
C.	90°C (194°F)
D.	85°C (185°F)
E.	200°C (392°F)

Answer 13

A. 120°C (248°F)

Question 14

14.	If the parallel rollers are quite long, the common term for these is \_\_\_\_\_ bearings.
A.	Pin
B.	Sleeve
C.	Needle
D.	Journal
E.	Shell

Answer 14

C. Needle

Question 15

15. Anti-friction bearings consist of moving components which roll” between two surfaces called:

A.	Races
B.	Tracks
C.	Grooves
D.	Valleys
E.	Sleeves

Answer 15

A. Races