Quiz #14: Lubrication Failures and Diagnostics Team 10 Sep, 2024 Lubrication System Analysis Quiz 1. What is a common cause of lubricant failure in a gearbox system? A) Overheating due to excessive load B) Proper oil change intervals C) Correct viscosity selection D) Clean oil filtration 2. Which of the following is an indicator of lubricant starvation in a bearing? A) Decrease in noise levels B) Darkened lubricant color C) High vibration levels and increased temperature D) Sudden drop in machine speed 3. What type of analysis is most effective for identifying wear particles in a lubricant sample? A) Karl Fischer Titration B) Fourier Transform Infrared (FTIR) Spectroscopy C) Particle Count Analysis D) Ferrous Density Analysis 4. Which lubricant condition can lead to oxidation failure? A) High moisture content B) Low operating temperatures C) Absence of contaminants D) Regular oil changes 5. What is a primary sign of lubricant degradation due to thermal stress? A) Decreased viscosity B) Formation of sludge and varnish C) High Total Base Number (TBN) D) Lower Acid Number (AN) 6. How can contamination-induced lubricant failure be effectively monitored? A) By checking oil color B) Using wear debris analysis and particle counting C) Measuring flash point D) Conducting grease compatibility tests 7. What is the effect of water contamination in lubricants on mechanical components? A) Increased load capacity B) Enhanced lubrication properties C) Corrosion and pitting D) Reduced oxidation stability 8. Which method is used to determine if lubricant foaming is causing failure in a hydraulic system? A) Viscosity Index Test B) Foam Tendency and Stability Test C) Pour Point Test D) Flash Point Test 9. What is the most likely cause of grease failure in electric motor bearings? A) High viscosity oil use B) Over-greasing C) Low ambient temperature D) Correct lubricant type 10. What type of lubrication failure can be detected by an increase in a lubricant's Total Acid Number (TAN)? A) Grease hardening B) Viscosity drop C) Acidic buildup and oxidation D) Oil dilution Submit
