Plain Bearings

Question 1

Plain bearings that support oscillating loads have much smaller

Answer 1

Clearances

Question 2

Prussian blue is directly applied to the bearing housing to reveal the areas to be scraped.

Answer 2

False

Question 3

Must not seize or under rubbing conditions

Answer 3

Compatibility

Question 4

Ability to retain lubricant

Answer 4

Wettability

Question 5

Allows contaminants to be absorbed into the softer bearing material

Answer 5

Embeddability

Question 6

Strong enough to support the load at max operating temp

Answer 6

Compressive strength

Question 7

Yields to misalignment or shaft imperfections

Answer 7

Conformability

Question 8

Resistant to flaking or cracking with rapidly changing speeds

Answer 8

Fatigue resistance

Question 9

A common material that is affixed to the steel backing in a plain bearing is

Answer 9

Babbitt

Question 10

Is the amount that the insert diameter is wider than the bearing housing diameter

Answer 10

Spread

Question 11

‘Blank’ is the distance that a new insert protrudes above the split line of the plain bearing housing.

Answer 11

Crush

Question 12

TorF Water lubricated bushings in a plain bearing are suitable for heavy loads.

Answer 12

False

Question 13

Lift check is also called ‘Blank’ check

Answer 13

Bump

Question 14

Plain bearings have no ‘blank’ elements

Answer 14

Rolling

Question 15

What makes a plain bearing different from an anti-friction bearing?

Answer 15

They have no rolling elements

Question 16

What is another name for a thrust load?

Answer 16

Axial load

Question 17

Which of the following bearing components is located on a machine shaft and supports a radial load?

Answer 17

Collar

Question 18

What material property ensures that the journal and bearing do not weld together?

Answer 18

Compatibility

Question 19

What bearing material has the best load rating?

Answer 19

Aluminum/Tin

Question 20

Which of the following types of bearings are used to prevent oil whirl?

Answer 20

Pivoting shoe

Question 21

If a machine has a speed range anywhere between 0 rpm and 3600 rpm, which of the following bearings would be suitable?

Answer 21

Hydrostatic

Question 22

If a pendulum was supported by a journal and bearing, what type of load is the bearing supporting?

Answer 22

Oscillating

Question 23

Which feature of the tapered land thrust bearing helps to form an oil wedge between the bearing and the collar.

Answer 23

The tapered section

Question 24

Which direction of load does a tilting pad bearing support.

Answer 24

Axial

Question 25

What is an advantage of a plain linear bearing when compared to an anti-friction linear bearing?

Answer 25

It is more resistant to vibration

Question 26

What bearing feature allows a hydrodynamic bearing to support a reciprocating or oscillating load?

Answer 26

Oil grooves

Question 27

Where is the oil inlet on a hydrostatic bearing?

Answer 27

360 around the journal

Question 28

What type of lubrication system relies on hydrostatic principles at start-up, then converts to hydrodynamic principles during normal operation?

Answer 28

Oil lift

Question 29

Which of the following is an advantage of the hydrodynamic lubrication system?

Answer 29

It is relatively simple and inexpensive

Question 30

How many axial bearings are used to locate a shaft?

Answer 30

1

Question 31

If a line shaft with five radial bearings is belt driven near the end, where is the fixed bearing located?

Answer 31

At the end closest to the drive belt