Chapter 76

Question 0

Relative to lubrication, one place where wear is beneficial is:
A) new Babbitt bearing surfaces which wear smooth
B) on pump wear rings
C) on the oil pump sealing surfaces
D) on the cylinder walls of internal combustion engines
E) in antifriction bearings

Answer 0

A) new Babbitt bearing surfaces which wear smooth

Question 1

Grease is not a suitable lubricant:
A) if the atmosphere contains a lot of moisture
B) when the atmosphere is dusty
C) if corrosion protection is desired during downtime
D) in the food industry
E) if a large amount of cooling is desired

Answer 1

E) if a large amount of cooling is desired

Question 2

If an oil's viscosity changes much with little temperature change, it will have:
A) a low viscosity index
B) a high pour point
C) a high carbon residue
D) a high viscosity index
E) a low pour point

Answer 2

A) a low viscosity index

Question 3

If you desire an oil to flow at a much lower temperature, you would most likely add:
A) a viscosity improver
B) pour point depressants
C) a dispersant
D) a thickening agent
E) low viscosity oil

Answer 3

B) pour point depressants

Question 4

High capacity steam turbine oils should:
A) have a low specific heat
B) have a very high viscosity
C) be fire resistant
D) have a low pour point
E) mix well with water

Answer 4

C) be fire resistant

Question 5

List four properties that affect the type of lubricant that should be chosen for an application:

Answer 5

Nature of surfaces to be lubricated
Load to be carried
Speed of sliding surfaces
Operating temperature

Question 6

An oil which has little change in viscosity as the temperature changes will have a _____ viscosity index.

Answer 6

High