Quiz - Lubrication

Question 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

Answer 1

d) It’s viscosity

Question 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

Answer 2

a) In the loaded zone

Question 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

Answer 3

b) Block lubrication system

Question 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

Answer 4

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

Question 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

Answer 5

c) Halfway up the bottom rolling element

Question 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

Answer 6

b) Oil mist lubrication

Question 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

Answer 7

c) Greater sealing ability

Question 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

Answer 8

b) High Viscosity

Question 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

Answer 9

d) They have poor demulsibility

Question 10

Which type of friction would produce the greatest heat?

a) Fluid
b) Rolling
c) Sliding
d) Mixing

Answer 10

c) Sliding

Question 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

Answer 11

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.

Question 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

Answer 12

d) Lowest viscosity index

Question 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

Answer 13

d) Retains heat

Question 14

A bottle lubricator relies on _______ to deliver oil to the lubrication point.

a) Capillary action
b) Centrifugal force
c) Heat
d) Vibration

Answer 14

d) Vibration

Question 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

Answer 15

a) 62.8 ft/min

Question 16

Wick feed oilers rely on _______ to deliver oil to the lubrication point.

a) Capillary action
b) Centrifugal force
c) Gravity
d) Heat

Answer 16

a) Capillary action

Question 17

Which of the following would be classified as a “soap” thickener for grease?

a) Bentonite clay
b) Calcium
c) Polyurea
d) Silicone

Answer 17

b) Calcium