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CLS Certified Lubrication Specialist VIP Practice Exam
CLS — The Certified Lubrication Specialist (CLS) credential is administered by the Society of Tribologists and Lubrication Engineers (STLE); the exam consists of approximately 100 multiple-choice questions covering lubricant fundamentals, tribology, lubricant application, contamination control, lubricant analysis, and health/safety/environmental topics, with a recommended passing score near 70%.
55
Questions
150m
Time Limit
70.00%
To Pass
Question 1 of 55👑 VIP
A maintenance engineer notices that a gearbox operating under heavy shock loads and wide temperature swings is experiencing accelerated bearing wear. The current mineral oil ISO VG 220 is being replaced. Which lubricant property is MOST critical to evaluate when selecting a replacement to address the shock-load wear issue?
Questions 2–55 and full explanations are VIP-exclusive.