Fundamentals Of Lubrication Quiz

Lubrication is important for reducing friction between moving parts, which helps to prevent wear and tear, overheating, and damage to the machinery. By providing a lubricating layer between surfaces, it allows them to slide or roll smoothly against each other, thereby reducing the resistance caused by friction. This ultimately improves the efficiency and performance of the machinery, as well as prolongs its lifespan. Therefore, the most important function of lubrication is to minimize friction.

The wear on equipment surfaces can be caused by the contact of two metal surfaces, low film strength, and bad quality of lubricant. When two metal surfaces come into contact, friction and abrasion occur, leading to wear. Low film strength refers to the inability of the lubricant to form a protective layer between the surfaces, allowing direct metal-to-metal contact. Additionally, if the lubricant used is of poor quality, it may not provide sufficient protection, leading to increased wear. Therefore, all of these factors contribute to the wear on equipment surfaces.

During the topic of 'heat removal by grease', the equipment that was discussed was the electric motor bearing. Grease is commonly used in electric motor bearings to remove heat generated during operation. It acts as a lubricant and helps in dissipating the heat, ensuring smooth and efficient functioning of the motor.

The two main factors to select a lubricant are the type of oil and the viscosity of oil. The type of oil refers to the specific lubricant that is required for the equipment, while the viscosity of oil refers to its thickness or consistency. Different types of equipment and bearings require different types and viscosities of oil to ensure proper lubrication and performance. Therefore, considering the type of oil and its viscosity is crucial in selecting the appropriate lubricant for a particular application.

Synthetic oil has all molecules of the same size. This means that the molecules in synthetic oil are uniform in size, unlike other substances where molecules can vary in size. Having molecules of the same size in synthetic oil can provide certain advantages, such as better lubrication and heat transfer properties, as well as more consistent performance.

CentiStokes is the correct answer because it is a unit of measurement commonly used to measure the viscosity of fluids, including oil. Viscosity refers to a fluid's resistance to flow, and CentiStokes specifically measures dynamic viscosity. This unit is derived from the Stokes unit, which measures kinematic viscosity, but is more commonly used in industrial applications. Therefore, CentiStokes is the appropriate unit for measuring the viscosity of oil.

Solid and fluid friction are the two types of friction in lubrication. Solid friction occurs when two solid surfaces come into contact and resist each other's motion. In lubrication, this type of friction is reduced by introducing a lubricant between the surfaces. Fluid friction, on the other hand, occurs when a fluid, such as a liquid or a gas, is present between the surfaces. The fluid acts as a lubricant, reducing the friction between the surfaces and allowing for smooth movement. Therefore, solid and fluid friction are the two types of friction that play a role in lubrication.

In a hydraulic equipment, the type of lubricant that will be used is AW - Anti-Wear. This lubricant is specifically designed to reduce wear and tear on the equipment's moving parts, preventing damage and extending the lifespan of the equipment. It provides a protective film between the surfaces, reducing friction and minimizing the risk of metal-to-metal contact. This type of lubricant is commonly used in hydraulic systems to ensure smooth operation and prevent premature failure of the equipment.