Chapter 30

Question 1

Which of the following are reasons for using lubricant?A. Corrosion reduction
B. Temperature control
C. Shock absorption
D. All of the above

Answer 1

D

Question 2

How does a lubricant control the metal temperature in rotating equipment? a) By increasing friction and reflecting heat away from the surfaces
b) By reducing friction and absorbing heat from the surfaces
c) By preventing heat generation and adding heat to the surfaces
d) By insulating the metal surfaces from any temperature changes

Answer 2

B

Question 3

If an oil has a higher viscosity index, this indicates that its viscosity changes ______ with temperature change

a) greatly
b) moderately
c) little
d) unpredictably

Answer 3

C

Question 4

Pertaining to oils, explain, what are the flash and fire points?

Answer 4

The flash point of an oil is the temperature at which the oil will give off sufficient vapor to ignite momentarily when mixed with air and exposed to a source of ignition.
The fire point of an oil is the temperature at which enough vapor is given off to burn continuously.