Millwright - 2nd Year - Lubrication: Part A Correct Questions & Answers(SCORED A)

The resistance to movement between two surfaces that touch each other. - ANSWERSWhat is Friction? Using lubricants - ANSWERSWhat is the best wasy to mitigate friction? 1. Increased power consumption 2. It causes wear 3. It generates waste heat that can reduce life of components - ANSWERSWhat are the negative effects of friction? 1. Provides traction between the rolling elements and the raceways to ensure rolling instead of skidding 2. Promotes accurate tracking in bearing raceways 3. Provides means of starting, stopping and accelerating most machines 4. Provides a means of polishing - ANSWERSWhat are the positive effects of friction? 1. Sliding 2. Rolling 3. Fluid - ANSWERSWhat are the 3 forms of friction? The resistance to movement that is produced when one survace slides across another - ANSWERSWhat is sliding friction? By interlocking, tearing and momentary molecular welding of the peaks of asperities of the two surfaces - ANSWERSHow is sliding resistance produced? Sliding friction - ANSWERSWhat type of friction offers the most resistance? The resistance of movement of one surface rolling over another - ANSWERSWhat is rolling friction? The resistance of the material to being deformed - ANSWERSOf what is rolling friction mainly a result? No, it offers more but less than sliding friction - ANSWERSDoes rolling friction offer more resistance than fluid friction?