Quiz #06: Lubricants & Lubrication (2) Team 30 Aug, 2024 Lubrication Quiz 1. What is the main function of anti-wear additives in lubricants? A) To reduce oil consumption B) To form a protective film on metal surfaces C) To improve viscosity D) To enhance oil color 2. Which type of lubrication regime occurs when the lubricant film completely separates two sliding surfaces? A) Boundary lubrication B) Mixed lubrication C) Elastohydrodynamic lubrication D) Hydrodynamic lubrication 3. What is the purpose of a pour point depressant additive in lubricants? A) To increase the viscosity at high temperatures B) To reduce the freezing point of the lubricant C) To prevent oxidation D) To enhance anti-wear properties 4. Which of the following is a key advantage of synthetic lubricants over mineral oils? A) Higher susceptibility to oxidation B) Lower cost C) Better performance at extreme temperatures D) Greater water solubility 5. What does the term "viscosity index" (VI) indicate about a lubricant? A) The lubricant's resistance to oxidation B) The lubricant's resistance to changes in viscosity with temperature C) The thickness of the lubricant film D) The presence of anti-wear additives 6. What is the main consequence of lubricant foaming in a hydraulic system? A) Improved cooling efficiency B) Enhanced lubrication properties C) Air entrapment leading to erratic operation D) Increased system pressure 7. Which lubricant property is crucial for applications involving low temperatures? A) High flash point B) Low pour point C) High viscosity index D) High base number 8. What is the role of rust and oxidation inhibitors in a lubricating oil? A) To reduce friction between surfaces B) To neutralize acids formed during oxidation C) To prevent the formation of sludge D) To prevent metal surface corrosion and oil oxidation 9. Which type of contamination is most likely to cause abrasive wear in a lubricated component? A) Water B) Air bubbles C) Solid particles D) Glycol 10. What does a significant drop in oil's Total Acid Number (TAN) typically indicate? A) Excessive wear B) Loss of additive effectiveness C) Water contamination D) Improved oil quality Submit
