LUBR 6001 - Lubrication (Chp 30) Flashcards
A material that is commonly used as a solid lubricant is:
A) Lime B) Tallow C) Molybdenum disulfide D) Molybdate sulfide E) Sodium carbonate
C) Molybdenum disulfide
Which of the following purposes of lubrication between two moving metallic surfaces is most important?
A) Sealing B) Temperature control C) Corrosion reduction D) Friction reduction E) Shock absorption
D) Friction reduction
The viscosity of oil:
- Is the temperature at which oil will burn
- Determines the ability of the oil to support a load
- Will prevent corrosion of bearings
- Indicates the liquid’s inability to flow
A) 2, 4 B) 1, 3 C) 3, 4 D) 2, 3, 4 E) 1, 2, 4
A) 2, 4
Viscosity index provides a measure of oil’s tendency to:
A) Resist change due to oxidation
B) Change viscosity under load
C) Change viscosity due to temperature change
D) Maintain viscosity when contaminated with water
E) Resist changes due to contamination
C) Change viscosity due to temperature change
A disadvantage of a high flash point oil is:
A) Low viscosity B) Increased safety of operation C) Wider range of operating temperatures D) Depressed pour point E) Increased carbon residue
E) Increased carbon residue
The instrument which measures the viscosity of oil at a certain temperature as it flows through a small diameter tube is called a/an:
A) Orifice plate B) Saybolt viscosimeter C) Oil meter D) A pyrometer E) A thermocouple
B) Saybolt viscosimeter
If you desire an oil to flow at a much lower temperature, you would most likely add:
A) A viscosity index improver B) A thickening agent C) A dispersant D) Low viscosity oil E) Pour point depressants
E) Pour point depressants
Grease is not a suitable lubricant:
A) In the textile and food industries
B) If a large amount of cooling is desired
C) If corrosion protection is desired during downtime
D) When the atmosphere is dusty
E) If the atmosphere contains a lot of moisture
B) If a large amount of cooling is desired
The measure of a liquid lubricating oil’s ability to resist internal deformation or shear is called:
A) Viscosity index B) Neutralization number C) Viscosity D) Flash point E) Pour point
C) Viscosity
Greases are a mixture of petroleum oil and:
A) Lard B) Carbon powder C) Soap D) Synthetic oils E) Paraffin
C) Soap
If an oil’s viscosity changes a great deal with little temperature change, it will then have a:
A) Low viscosity index B) Low pour point C) High viscosity index D) High carbon residue E) High pour point
A) Low viscosity index
Which of the following has the greatest affect on the viscosity of lubrication oil?
A) Pressure B) Flow C) Speed D) Load E) Temperature
E) Temperature
