Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PENG 4th Class > Unit 1 Lubrication and Bearings > Flashcards

Unit 1 Lubrication and Bearings Flashcards

1
Q 
The point at which oil will give off enough vapour to ignite and burn continuously is known as the \_\_\_\_\_ point.
Select one:
a. Flash 
b. Ignition
c. Fire
d. Vaporization
A

c. Fire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q 
When grease is used in an antifriction bearing after cleaning, the bearing housing should not be filled \_\_\_\_\_ full.
Select one:
a. more than 1/3 
b. more than 1/2
c. more than 3/4
d. less than completely
A

a. more than 1/3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q 
The characteristics of a grease are determined by:
Select one:
a. Its thickening agent or “soap” 
b. Its consistency
c. The type of oil used in the grease
d. Its protective coating
A

a. Its thickening agent or “soap”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q 
Air compressor oil should:
Select one:
a. Have a very low viscosity
b. Have low carbon residue 
c. Have a low flash point
d. Not contain anti-oxidants
A

b. Have low carbon residue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q 
Applying installation forces through the balls of a bearing can cause:
Select one:
a. Bearing misalignment
b. too large an air gap
c. Cracking or breaking of the balls 
d. Brinelling
A

d. Brinelling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q 
A common cause of antifriction bearing failure is:
Select one:
a. High RPM service
b. Extreme cold temperature cracking
c. Drive motor overload
d. Shaft misalignment
A

d. Shaft misalignment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q 
The majority of lubricants are:
Select one:
a. Animal fats
b. Synthetic oils
c. Mineral oils
d. Greases
A

c. Mineral oils

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The lubricant for an anti-friction bearing:
Select one:
a. Will separate the moving parts completely
b. Must be cooled
c. Could be a semi-solid lubricant
d. Should have a high viscosity

A

c. Could be a semi-solid lubricant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Grease:
Select one:
a. Is a semi-liquid
b. Is an excellent high-speed, low load lubricant
c. Attracts dirt and water to bearings, leading to premature failure
d. Can be used under conditions where oil may leak away and leave the bearing dry

A

d. Can be used under conditions where oil may leak away and leave the bearing dry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Using pressurized air to blow out a cleaned bearing:
Select one:
a. Should only be done in well-ventilated areas
b. Must be done only while the bearing is hot
c. Will cause the bearing to become “pitted”
d. should be done at an angle so the bearing can spin

A

c. Will cause the bearing to become “pitted”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

With antifriction bearings using grease, the bearings:
Select one:
a. Must be cleaned twice as often as oil-lubricated bearings
b. can be cleaned by adding solvent to the grease cartridge
c. Are cleaned less often than oil-lubricated bearings
d. Never require cleaning

A

c. Are cleaned less often than oil-lubricated bearings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q 
All semi-solid lubricants:
Select one:
a. Have a low viscosity 
b. Are capable of sealing out dirt and water from bearings
c. Contain graphite
d. Resist moisture
A

b. Are capable of sealing out dirt and water from bearings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q 
The groove that is cut in the top half in the lining of a shell bearing should not extend closer to the ends than:
Select one:
a. 3 mm
b. 10 mm
c. 1.25 cm 
d. 1.7 cm
A

c. 1.25 cm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q 
A thrust bearing which does not utilize the oil wedge principle of lubrication is the:
Select one:
a. Michell type 
b. Collar type
c. Radial type
d. Kingsbury type
A

b. Collar type

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q 
Which of the following has the greatest effect on the viscosity of lubrication oil?
Select one:
a. Pressure
b. Load
c. Temperature 
d. Speed
A

c. Temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q 
The cheapest and most commonly used grease is:
Select one:
a. Potassium base
b. Chlorine base
c. Lime base 
d. Sulphate base
A

c. Lime base

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q 
The ability of an oil to lift and support heavy loads depends upon:
Select one:
a. kinetic energy
b. Hydraulic pressure 
c. acceleration
d. Pour point
A

b. Hydraulic pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q 
When inspecting a dismantled bearing, the first indication of a failing bearing is:
Select one:
a. Cracked balls
b. Roughness 
c. Discoloration
d. Rusting or corrosion
e. Tapered rollers
A

b. Roughness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q 
The proper way to store a bearing after cleaning is to dip it in \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ and wrap it in grease-proof paper.
Select one:
a. a desiccant such as rice 
b. Wax
c. Solvent
d. A rust preventative
A

d. A rust preventative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q 
If an oil must flow at a very low temperature, it must have the following additive:
Select one:
a. Viscosity index improver 
b. Pour point depressant
c. Dispersant
d. Floc point improver
A

b. Pour point depressant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q 
An anti-friction bearing:
Select one:
a. Is constructed with white metal alloy
b. Wears to a smooth, low-friction surface
c. Has rolling friction 
d. Is a sleeve bearing
A

c. Has rolling friction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

When replacing or removing an anti-friction ball bearing, the applied force should:
Select one:
a. Not be transmitted through the bearing balls
b. Always be against the inner race
c. Always be against the outer race
d. Be made only after heating the bearing

A

a. Not be transmitted through the bearing balls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q 
The resistance of a liquid to internal deformation or shear is known as:
Select one:
a. Pour point
b. Viscosity index 
c. Flash point
d. Viscosity
A

d. Viscosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q 
The property of oil that indicates its ability to support a load is:
Select one:
a. Viscosity 
b. Viscosity index
c. Pour point
d. Floc point
A

a. Viscosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q 
Fluid film lubrication:
Select one:
a. eliminates all bearing friction 
b. Is different from flood lubrication
c. Supports heavy loads
d. Prevents wear during start-up
A

c. Supports heavy loads

26
Q 
Lubricants used for high-output steam turbines should:
Select one:
a. Have a very high viscosity
b. Be fire resistant 
c. Have a low pour point
d. Mix well with water
A

b. Be fire resistant

27
Q 
A normal anti-friction bearing temperature operating range is:
Select one:
a. 150°C to 160°C
b. 20°C to 50°C
c. 65°C to 70°C 
d. 80°C to 120°C
A

c. 65°C to 70°C

28
Q

Large journal or sleeve bearings have grooves:
Select one:
a. In the high pressure area of the bearing babbit
b. Cut into the bearing housing
c. For distributing lubricant evenly just after the pressure area
d. In the non-pressure area

A

d. In the non-pressure area

29
Q 
Where gear teeth inter-mesh, a lubricant must provide
Select one:
a. Corrosion prevention
b. Sealing 
c. Shock absorption  
d. Temperature control
A

c. Shock absorption

30
Q 
If ambient air temperatures are very low, the preferred lubricant is a:
Select one:
a. Solid 
b. Semi-solid
c. Fixed oil
d. Liquid
A

a. Solid

31
Q 
Which type of oil produces higher fluid friction?
Select one:
a. High viscosity oil
b. Low viscosity oil 
c. Synthetic oils
d. Fixed oils
A

a. High viscosity oil

32
Q 
A form of lubrication that requires continual motion of a shaft or surface is:
Select one:
a. Boundary lubrication
b. Continuous lubrication
c. Forced lubrication
d. Fluid film lubrication
A

d. Fluid film lubrication

33
Q 
If an oil’s viscosity changes a lot with very little temperature change, it will have a:
Select one:
a. Low viscosity index 
b. High pour point
c. High viscosity index
d. Low pour point
A

a. Low viscosity index

34
Q

Grease is not a suitable lubricant:
Select one:
a. If the atmosphere contains a lot of moisture
b. When the atmosphere is dusty
c. If corrosion protection is desired during downtime
d. If a large amount of cooling is desired

A

d. If a large amount of cooling is desired

35
Q 
A type of anti-friction bearing is the \_\_\_\_\_ .
Select one:
a. Kingsbury
b. Ball bearing 
c. Sleeve bearing
d. Journal bearing
A

b. Ball bearing

36
Q 
The oil for a refrigeration compressor must:
Select one:
a. Have a low pour point 
b. Have a high flash point
c. Have a high fire point
d. Be a multi-grade type
A

a. Have a low pour point

37
Q 
The \_\_\_\_\_ number of oil indicates the acidity of oil.
Select one:
a. Acidity
b. Alkalinity
c. Neutralization 
d. Viscosity index
A

c. Neutralization

38
Q 
The instrument that measures the viscosity of an oil at a certain temperature as it flows through a small diameter tube, is called:
Select one:
a. An orifice plate
b. A Saybolt viscometer 
c. An oil meter
d. A vena contracta
A

b. A Saybolt viscometer

39
Q

A large journal bearing which is running hotter than normal can be cooled by:
Select one:
a. Direct application of cool water
b. Loosening the bearing caps
c. Decreasing the viscosity of the oil by cooling it
d. pumping additional grease into it

A

b. Loosening the bearing caps

40
Q 
A journal bearing:
Select one:
a. Controls thrust movement
b. Does not require lubrication
c. require cooling water
d. Supports a shaft
A

d. Supports a shaft

41
Q 
Air compressor oil should:
Select one:
a. Have a very low viscosity
b. Have low carbon residue
c. Have a low flash point 
d. Not contain anti-oxidants
A

b. Have low carbon residue

42
Q 
A normal anti-friction bearing temperature operating range is:
Select one:
a. 150°C to 160°C
b. 20°C to 50°C
c. 65°C to 70°C
d. 80°C to 120°C
A

c. 65°C to 70°C

43
Q

Grease:
Select one:
a. Is a semi-liquid
b. Is an excellent high-speed, low load lubricant
c. Attracts dirt and water to bearings, leading to premature failure
d. Can be used under conditions where oil may leak away and leave the bearing dry

A

d. Can be used under conditions where oil may leak away and leave the bearing dry

44
Q 
A material that is commonly used as a solid lubricant is:
Select one:
a. Tallow
b. Lime 
c. Molybdenum disulfide
d. Sodium carbonate
A

c. Molybdenum disulfide

45
Q 
Applying installation forces through the balls of a bearing can cause:
Select one:
a. Bearing misalignment
b. too large an air gap
c. Cracking or breaking of the balls
d. Brinelling
A

d. Brinelling

46
Q 
The ability of an oil to lift and support heavy loads depends upon:
Select one:
a. kinetic energy
b. Hydraulic pressure 
c. acceleration
d. Pour point
A

b. Hydraulic pressure

47
Q 
An anti-friction bearing:
Select one:
a. Is constructed with white metal alloy
b. Wears to a smooth, low-friction surface 
c. Has rolling friction
d. Is a sleeve bearing
A

c. Has rolling friction

48
Q

Grease is not a suitable lubricant:
Select one:
a. If the atmosphere contains a lot of moisture
b. When the atmosphere is dusty
c. If corrosion protection is desired during downtime
d. If a large amount of cooling is desired

A

d. If a large amount of cooling is desired

49
Q 
If ambient air temperatures are very low, the preferred lubricant is a:
Select one:
a. Solid
b. Semi-solid 
c. Fixed oil
d. Liquid
A

a. Solid

50
Q

When replacing or removing an anti-friction ball bearing, the applied force should:
Select one:
a. Not be transmitted through the bearing balls
b. Always be against the inner race
c. Always be against the outer race
d. Be made only after heating the bearing

A

a. Not be transmitted through the bearing balls

51
Q 
A thrust bearing which does not utilize the oil wedge principle of lubrication is the:
Select one:
a. Michell type
b. Collar type 
c. Radial type
d. Kingsbury type
A

b. Collar type

52
Q 
Lubricants used for high-output steam turbines should:
Select one:
a. Have a very high viscosity
b. Be fire resistant 
c. Have a low pour point
d. Mix well with water
A

b. Be fire resistant

53
Q 
The point at which oil will give off enough vapour to ignite and burn continuously is known as the \_\_\_\_\_ point.
Select one:
a. Flash
b. Ignition 
c. Fire
d. Vaporization
A

c. Fire

54
Q 
The oil for a refrigeration compressor must:
Select one:
a. Have a low pour point 
b. Have a high flash point
c. Have a high fire point
d. Be a multi-grade type
A

a. Have a low pour point

55
Q 
The cheapest and most commonly used grease is:
Select one:
a. Potassium base
b. Chlorine base
c. Lime base 
d. Sulphate base
A

c. Lime base

56
Q 
The kind of grease used for heavily loaded machinery operating at slow speeds is the:
Select one:
a. Sodium base grease 
b. Specialty grease
c. Calcium base grease
d. Aluminum base grease
A

b. Specialty grease

57
Q 
A collar thrust bearing:
Select one:
a. Can support more load than a Michell thrust bearing
b. Is an anti-friction type bearing
c. Is used with steam turbines only
d. Has boundary lubrication
A

d. Has boundary lubrication

58
Q 
The groove that is cut in the top half in the lining of a shell bearing should not extend closer to the ends than:
Select one:
a. 3 mm
b. 10 mm
c. 1.25 cm 
d. 1.7 cm
A

c. 1.25 cm

59
Q 
The \_\_\_\_\_ number of oil indicates the acidity of oil.
Select one:
a. Acidity
b. Alkalinity
c. Neutralization 
d. Viscosity index
A

c. Neutralization

60
Q 
A shell type bearing:
Select one:
a. Is used for axial thrust
b. Is an anti-friction bearing 
c. Consists of ball bearings in a shell
d. Is used for heavy loads
A

d. Is used for heavy loads

PENG 4th Class (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions