bearings test teacher questions

Question 1

This type of bearing is used for drives where the load is applied, parallel to or slightly above the horizontal

Answer 1

angle bearing

Question 2

Name two basic types of bearings used

Answer 2

Friction and anti-friction bearings

Question 3

Friction bearings are also referred to as?

Answer 3

plain bearings sleeve bearings and journal bearings

Question 4

Anti-friction bearings have a rolling contact between the shaft and bearing using?

Answer 4

Balls, needles or rollers

Question 5

bearing housings are made from what materials ?

Answer 5

cast iron - general use light-medium loads
cast steel- general use light-heavy loads
fabricated steel- special jobs

Question 6

This type of bearing is used for drives were the load is applied parallel to or slightly above horizontal

Answer 6

angle bearing

Question 7

This bearing combines the rigidity of a solid block with the advantage of split construction and a suitable for sideloading

Answer 7

gib joint bearing

Question 8

I have the liner materials available for bearings to the millwright. What is the only one that can be handled from start to finish without requiring machine shop preparation?

Answer 8

babbit

Question 9

What type of Berean uses a shaft itself as a bearing in a ring

Answer 9

needle bearings

Question 10

What type of antifriction bearing is generally suited to high-speed applications

Answer 10

ball bearing

Question 11

Bearings may have either a straight or tapered for standard taper, has a ratio of?

Answer 11

1:12
k 30 means 1:30 ( very large bearings)

Question 12

Variance having a tapered board, will have their code number with what letter

Answer 12

K indicates a tapered bore

Question 12

What type of bearing would be used by the lubricant in a bearing is to be kept in the Bearing

Answer 12

sealed bearing

Question 13

The space left in the bearing after installing it on the shaft or in a housing or the space left in a taper bore bearing that has been forced up to taper is called?

Answer 13

installed clearance

Question 14

The term Babbitt includes several all the ways that contain various propositions of

Answer 14

tin
copper
lead

Question 15

Depending on the Alloy , when pouring a bearing, the temperature of Babbitt should be between

Answer 15

650 f-700f

Question 16

In a Babbitt, bearing what prevents the bad it from, turning, and holds it firmly against the casting?

Answer 16

keys

Question 16

A short smooth piece of dummy shaft is used to take up the space of the original shaft in the machine during the Babbitt poor what is the dummy shaft called?

Answer 16

mandrel

Question 16

Do not pour Babbitt into a bearing assembly that has not been heated first to remove any free water or surface, moisture, free, water, or or moisture will cause

Answer 16

blow back

Question 17

In the Babbitt, bearing the corners of the bottom, half of the Bearing must be?

Answer 17

relieved

Question 18

What material is used with checking a Babbitt bearing for contact

Answer 18

Prussian blue

Question 19

When cutting oil or grease grooves in a babbit bearing, where should they be located?

Answer 19

bearing cap (unloaded section)

Question 20

To firmly attach a thin skin of babbit material to a metallic backing you must perform this operation

Answer 20

tinning

Question 21

When Bearing shells are first install, they frequently extend past the face of the bearing buy a small amount, which is known as

Answer 21

crush

Question 22

Rust control, and friction variance is obtained by bearing design or

Answer 22

shaft collar

Question 22

What force does the Kingsbury thrust bearing depend on for complete lubrication?

Answer 22

centrifugal force

Question 23

This occurrence in and antifriction bearing changes the contact area on the raceway and extends the service life of the Bearing

Answer 23

creep

Question 24

The recommended maximum temperature for heating a bearing varies the usual temperature range is

Answer 24

no more than 250f

Question 25

On a shaft that has four antifriction bearings how many bearings are floating?

Answer 25

3

Question 26

When an antifriction bearing is to be fixed on a shaft, the method of holding the bearing is with

Answer 26

lock nuts

Question 27

When locating a floating Bearing placement of the bearing is always

Answer 27

in the centre

Question 28

To mount a bearing with a tapered bore on standard shaft in you would use

Answer 28

adapter sleeve

Question 29

A rule of thumb for seven diametral clearance, when no tables are available is to reduce the initial clearance by roughly

Answer 29

50%

Question 30

The best way to remove a bearing with a minimum amount of damage to the Bearing and shaft is with a set of pullers or press all strains must be applied to

Answer 30

inner race

Question 31

When applying Greece to an anti-fiction bearing before installation, how much grease is put in the case

Answer 31

1/3 to 1/2

Question 31

When tightening a locknut to install a bearing , the slots in the lock nut do not line up with the tabs in the lock washer. What would you do?

Answer 31

continue forward to the next tab

Question 31

What is the most common cause of a bearing failure?

Answer 31

contamination

Question 32

What basic functions do bearings provide?

Answer 32

support moving shafts and slides reduce friction confine moving components

Question 33

a bearing is selected for an application on the basis of?

Answer 33

equipment requirements

Question 33

What kind of shaft motion is controlled by a journal Bearing

Answer 33

radial

Question 34

In addition to supporting the gear shaft and carrying a load, what other functions do bearings perform?

Answer 34

maintain shaft alignment

Question 35

Which of the following best describes the hardness of a plane bearing relative to the hardness of the components they guide and support

Answer 35

softer

Question 36

A dark coloured bearing indicates

Answer 36

over heating

Question 36

Hasty, bearing installation frequently results in

Answer 36

early bearing failure

Question 37

Compared to antifriction bearings plane journal bearings have definite advantages, which of the following is not an advantage

Answer 37

less axial space required

Question 38

One of the most common causes of plain journal bearing failure is

Answer 38

improper lubrication

Question 39

A journal bearings lubricant groove should be located in the area of

Answer 39

least pressure (unloaded area)

Question 40

Compared to bearing wall thickness how deep should a lubricant groove be cut?

Answer 40

1/3 wall thickness

Question 41

Properly lubricated and aligned plane, journal bearings are especially suited to which of the following applications

Answer 41

heavy duty low speed

Question 42

Internal wear in a bearing may be detected by

Answer 42

metal particles in oil

Question 43

The principal limitation of antifriction bearings is their lack of resistance to

Answer 43

contaminating particles

Question 44

Which of the following roller bearings is designed to carry combined radio and Rust loads

Answer 44

tapered roller

Question 45

Size for size which roller bearing has the greatest load carrying capacity

Answer 45

needle roller

Question 46

The operating temperature of a bearing should not exceed

Answer 46

250 deg f

Question 47

Running clearance in a fraction, Bearing is measured between the

Answer 47

shaft od and the bearing bore

Question 48

Where do you check for a diametral clearance on a antifriction Bearing

Answer 48

between the outer raceway and the rolling element

Question 49

What is the most common cause of Bearing failure immediately after installation?

Answer 49

over lubrication