Quiz - Lubrication Flashcards Preview

Millwright 2nd Block > Quiz - Lubrication > Flashcards

Flashcards in Quiz - Lubrication Deck (17):
1


The measure of oil's ability to flow is know as...
a) It's flashpoint
b) It's pour point
c) It's emulsibility
d) It's viscosity

d) It's viscosity

2


The lubrication entry point for an oil lift bearing would be...
a) In the loaded zone
b) 180° opposite to the loaded zone
c) 90° from the unloaded zone in the direction of rotation
d) 90° from the unloaded zone opposite to the direction of rotation

a) In the loaded zone

3


Of the following, which lubrication system would be best suited for large compressor applications?
a) Air/Oil system
b) Block lubrication system
c) Mechanical lubrication system
d) Oil mist system

b) Block lubrication system

4


Under general conditions, when applying grease to a bearing in a pillow block housing, the bearing should be packed....
a) Full with the housing left empty
b) Halfway up the bottom rolling element
c) 80% to 100% full, with the housing packed 1/3 to 1/2 full
d) 1/3 to 1/2 full, with the housing also packed 1/3 to 1/2 full

c) 80% to 100% full, with the housing packed 1/3 to 1/2 full

5


Oil in an anti-friction bearing housing should be....
a) Completely covering the bottom rolling element
b) Completely submerging the bearing
c) Halfway up the bottom rolling element
d) Halfway up the bearing

c) Halfway up the bottom rolling element

6


Which method of lubrication is frequently recommended for high speed, anti-friction bearings?
a) Oil bath
b) Oil mist lubrication
c) Oil ring
d) Splash lubrication

b) Oil mist lubrication

7


A higher viscosity fluid would have ________ than a lower viscosity fluid.
a) Less fluid friction
b) A better viscosity index
c) Greater sealing ability
d) More entrained waxes

c) Greater sealing ability

8


Of the following which one would probably NOT be a contributor to boundary film lubrication?
a) Low speeds
b) High Viscosity
c) High heat
d) Insufficient amount of lubricant

b) High Viscosity

9


Which of the following is NOT a characteristic of petroleum based oils?
a) They do not wear out
b) In their pure state they are corrosive free
c) They can be re-refined
d) They have poor demulsibility

d) They have poor demulsibility

10


Which type of friction would produce the greatest heat?
a) Fluid
b) Rolling
c) Sliding
d) Mixing

c) Sliding

11


What would be the pour point of oil if it showed no movement when held horizontally for 5 seconds at 12°C?
a) 6°C
b) 9°C
c) 12°C
d) 15°C

d) 15°C
Pour point is 3°C above the temperature at which the oil shows no movement from a container held horizontally for 5 seconds.

12


Which of the following is NOT important when considering the pour point of a lubricant?
a) Lowest temperature it will flow into bearings
b) Lowest start-up temperature
c) Lowest pump operating tempurature
d) Lowest viscosity index

d) Lowest viscosity index

13


Which of the following is NOT a function of the lubricant?
a) Aids in sealing
b) Flushes away contaminants
c) Reduces friction
d) Retains heat

d) Retains heat

14


A bottle lubricator relies on _______ to deliver oil to the lubrication point.
a) Capillary action
b) Centrifugal force
c) Heat
d) Vibration

d) Vibration

15


Calculate the surface speed, in feet per minute, of a 2" diameter shaft turning at 120 rpm.
a) 62.8 ft/min
b) 82.2 ft/min
c) 94.5 ft/min
d) 101.8 ft/min

a) 62.8 ft/min

16


Wick feed oilers rely on _______ to deliver oil to the lubrication point.
a) Capillary action
b) Centrifugal force
c) Gravity
d) Heat

a) Capillary action

17


Which of the following would be classified as a "soap" thickener for grease?
a) Bentonite clay
b) Calcium
c) Polyurea
d) Silicone

b) Calcium