The primary reason that machinery is replaced is due to:
A. Erosion
B. Accidents
C. Obsolescence
D. Surface degradation of the metal
E. Corrosion - ️️D. Surface Degradation of the Metal
Which of the following is not a lubrication regime (mode/type)?
A. Boundary
B. Elastohydrodyn...
The primary reason that machinery is replaced is due to: A. Erosion B. Accidents C. Obsolescence D. Surface degradation of the metal E. Corrosion - ✔ ✔ D. Surface Degradation of the Metal Which of the following is not a lubrication regime (mode/type)? A. Boundary B. Elastohydrodynamic C. Boudarydynamic D. Hydrodynamic E. Mixed film - ✔ ✔ C. Boundrydynamic Which maintenance strategy is based strictly on tasks performed at specific time intervals? A. Proactive B. Predictive C. Preventive D. Percussiv e E. Reactive - ✔ ✔ C. Preventive Condition -based maintenance: A. Is based on the condition of the equipment and the early detection of faults B. Is based on regular time -based overhauls C. Is based on run to failure D. Is based on the condition of the oil and other root causes E. Answers a and d - ✔ ✔ E: Answers A (Is based on the condition of the equipment and the early detection of Faults) & D (Is based on the condition of the oil and other root causes) The Par eto Principle (80/20 Rule) states: A. The largest beneficial effect is obtained from a critical few maintenance tasks. B. The largest beneficial effect is obtained from the (random) many maintenance tasks. C. All machines die sometime. D. All bearings las t forever. E. 80 percent of the people do 20 percent of the work. - ✔ ✔ A. The largest beneficial effect is obtained from a critical few maintenance tasks Which of the following is not a function of the lubricant? A. Cool surfaces B. Separate surfaces C. Prevent corrosion D. Repair surfaces E. Provide some sealing - ✔ ✔ D. Repair surfaces Which type or form of lubrication is considered to provide a full fluid (oil) film? A. Elastohydrodynamic B. Solid film C. Boundary D. Mixed E. All of the above - ✔ ✔ A. Elastohydrodynamic Elastohydrodynamic lubrication (EHL) is considered to occur primarily in: A. Piston rings and liners B. Journal bearings C. Rolling bearings, gears, and cams D.Slow -moving pins and bushings E. Worm gears - ✔ ✔ C. Rolling bearings, gears, and cams The oil film thickness (or dynamic operating clearance) in operating bearings: A. Cannot be determined B. Is about 10 microns for journal bearings (although can vary considerably) C. Is about a micron for rolling bearings D. Is not measurable E. Answers b & c - ✔ ✔ E. Answers B (Is about 10 microns for journal bearings (although can vary considerably)) & C ( Is about a micron for rolling bearings) Which is not a type of base oil (base stock)? A. Mineral B. Sy nthetic C. Antioxidant D. Vegetable E. Group III synthetic - ✔ ✔ C. Antioxidant Benefits generally associated with the use of synthetics include: A. Better oxidation resistance B. Better compatibility with elastomers (seals) C. Less toxicity D. Higher cost E. Better paint compatibility - ✔ ✔ A. Better Oxidation Resistance PAO synthetic base oils:
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