Tribology Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
Which type of friction is typically higher? - CORRECT ANSWER - Contact Friction
The Lambda parameter on the abscissa of the Stribeck curve is - CORRECT ANSWER -
Film Thickness/Roughness
Friction is the highest in which of the lubrication regimes - CORRECT ANSWER -
Boundary
Wear does not occur in which of the lubrication regimes - CORRECT ANSWER - Full
Film
If you are in the mixed lubrication regime and viscosity increases, friction will.. - CORRECT
ANSWER - Decrease
The largest constituent of a lubricating oil is the - CORRECT ANSWER - Base oil
A hydrocarbon with one double bond is called - CORRECT ANSWER - Unsaturated
The most widely used type of base oil is: - CORRECT ANSWER - Mineral
A grease thickener is a ________ that releases oil once motion begins. - CORRECT
ANSWER - Semi-solid
Which of the following is NOT a possible reason to use synthetic oil instead of mineral oil? -
CORRECT ANSWER - Cost
, Base oils are categorized into five: - CORRECT ANSWER - Groups
The distillation process separates chemical "fractions" based on their: - CORRECT
ANSWER - Boiling point
Alkanes and alkenes are differentiated based on the presence of: - CORRECT ANSWER -
Double bonds
Olefins and napthenes are differentiated based on the presence of: - CORRECT
ANSWER - Double bonds
Polyalphaolefin (PAO) is a _____________ base oil: - CORRECT ANSWER - Synthetic
Which of the following is NOT a category of lubricant additives: - CORRECT ANSWER -
Thickener
Viscosity modifiers minimize the change of viscosity with: - CORRECT ANSWER -
Temperature
Pour point depressants _________ the temperature at which the lubricant solidifies: - CORRECT
ANSWER - Lower
Which of the following does NOT accelerate oxidation reactions? - CORRECT
ANSWER - Thickeners
Which of the following surface additives primarily functions in the mixed lubrication regime? -
CORRECT ANSWER - Friction Modifiers
Which of the following additives does NOT contribute to preventing agglomeration and bulk up
of contaminants? - CORRECT ANSWER - Divestors
Exam Questions and CORRECT Answers
Which type of friction is typically higher? - CORRECT ANSWER - Contact Friction
The Lambda parameter on the abscissa of the Stribeck curve is - CORRECT ANSWER -
Film Thickness/Roughness
Friction is the highest in which of the lubrication regimes - CORRECT ANSWER -
Boundary
Wear does not occur in which of the lubrication regimes - CORRECT ANSWER - Full
Film
If you are in the mixed lubrication regime and viscosity increases, friction will.. - CORRECT
ANSWER - Decrease
The largest constituent of a lubricating oil is the - CORRECT ANSWER - Base oil
A hydrocarbon with one double bond is called - CORRECT ANSWER - Unsaturated
The most widely used type of base oil is: - CORRECT ANSWER - Mineral
A grease thickener is a ________ that releases oil once motion begins. - CORRECT
ANSWER - Semi-solid
Which of the following is NOT a possible reason to use synthetic oil instead of mineral oil? -
CORRECT ANSWER - Cost
, Base oils are categorized into five: - CORRECT ANSWER - Groups
The distillation process separates chemical "fractions" based on their: - CORRECT
ANSWER - Boiling point
Alkanes and alkenes are differentiated based on the presence of: - CORRECT ANSWER -
Double bonds
Olefins and napthenes are differentiated based on the presence of: - CORRECT
ANSWER - Double bonds
Polyalphaolefin (PAO) is a _____________ base oil: - CORRECT ANSWER - Synthetic
Which of the following is NOT a category of lubricant additives: - CORRECT ANSWER -
Thickener
Viscosity modifiers minimize the change of viscosity with: - CORRECT ANSWER -
Temperature
Pour point depressants _________ the temperature at which the lubricant solidifies: - CORRECT
ANSWER - Lower
Which of the following does NOT accelerate oxidation reactions? - CORRECT
ANSWER - Thickeners
Which of the following surface additives primarily functions in the mixed lubrication regime? -
CORRECT ANSWER - Friction Modifiers
Which of the following additives does NOT contribute to preventing agglomeration and bulk up
of contaminants? - CORRECT ANSWER - Divestors
