Lubricants Quiz

Graphite and molybdenum disulphide = Solid lubricants Greases = Semi-solid lubricants Animal/vegetable oil and blended oils = Liquid lubricants Viscosity index and flash point = Properties of lubricants

Viscosity = Resistance to flow Viscosity index = Measure of how viscosity changes with temperature Flash and fire point = Temperature at which a lubricant gives off flammable vapors Cloud and pour point = Temperature at which a lubricant becomes cloudy and flows like a solid

Thick Film = Forms a thick layer between moving parts Thin Film = Forms a thin layer between moving parts Extreme Pressure = Used for high load and high-speed applications Saponification values = Measurement of the amount of free fatty acids in a lubricant

<p>Frictional resistance = Causes wear and tear to moving parts Energy dissipation = Occurs in the form of heat due to frictional resistance Lubrication = Minimizes wear and tear by forming a protective layer Acid value = Indicates the presence of acidic substances in a lubricant</p> Signup and view all the answers

<p>Graphite and molybdenum disulphide = High-temperature and extreme pressure applications Greases = Bearings and heavy machinery Animal/vegetable oil and blended oils = Food processing and pharmaceutical industry Viscosity index and flash point = Automotive and industrial lubrication</p> Signup and view all the answers

<p>Thick Film = Type of lubrication mechanism Greases = Type of semi-solid lubricant Blended oils = Type of liquid lubricant Graphite and molybdenum disulphide = Type of solid lubricant</p> Signup and view all the answers

<p>Viscosity = Resistance to flow Flash and fire point = Temperature at which the lubricant ignites Cloud and pour point = Temperature at which the lubricant becomes cloudy and starts to solidify Acid value = Measurement of acidic impurities in the lubricant</p> Signup and view all the answers

<p>Reducing wear and tear = Minimizing damage to moving parts Energy dissipation = Conversion of mechanical energy into heat Frictional resistance minimization = Decreasing resistance between moving parts Heat generation = Result of friction between moving surfaces</p> Signup and view all the answers

<p>Animal/vegetable oil = Type of liquid lubricant Special applications = Customized lubricant usage Extreme Pressure = Type of lubrication mechanism Saponification values = Measurement relevant to specific lubricant problems</p> Signup and view all the answers

<p>Thin Film = Reduction of direct metal-to-metal contact Liquid lubricant = Versatile usage across various machines Solid lubricants = Effective in high temperature and extreme pressure environments Semi-solid lubricants = Suitable for applications with limited reapplication opportunities</p> Signup and view all the answers

<p>The functions of lubricants include reducing friction and wear between moving parts, dissipating heat, sealing out contaminants, and protecting against corrosion.</p> Signup and view all the answers

<p>Thin film lubrication involves the formation of a very thin layer of lubricant between moving surfaces, which reduces direct metal-to-metal contact and minimizes friction and wear.</p> Signup and view all the answers

<p>The properties of lubricants include viscosity, viscosity index, flash and fire point, cloud and pour point, acid value, and saponification value. These properties are significant in determining the lubricant's performance in different operating conditions and applications.</p> Signup and view all the answers

<p>Frictional resistance causes wear and tear to the surfaces of moving parts and dissipates energy in the form of heat. These ill effects can be minimized by using a suitable lubricant, which forms a thin layer between the moving parts, reducing friction and heat generation.</p> Signup and view all the answers

<p>Lubricants are classified into solid lubricants (e.g., graphite and molybdenum disulphide), semi-solid lubricants (e.g., greases), and liquid lubricants (e.g., animal/vegetable oil, blended oils). These classifications are based on the physical state of the lubricant.</p> Signup and view all the answers

<p>Solid lubricants examples: graphite, molybdenum disulphide. Semi-solid lubricants example: greases. Liquid lubricants examples: animal/vegetable oil, blended oils.</p> Signup and view all the answers

<p>Properties of lubricants include viscosity, viscosity index, flash and fire point, cloud and pour point, acid value, saponification value. Significance: these properties determine the effectiveness and suitability of the lubricant for specific applications.</p> Signup and view all the answers

<p>Functions of lubricants include reducing friction, minimizing wear and tear, dissipating heat, and forming a protective layer between moving parts. This minimizes the ill effects of frictional resistance by reducing wear and energy dissipation.</p> Signup and view all the answers

<p>Thick film lubrication forms a thick layer between surfaces, thin film lubrication forms a thin layer, and extreme pressure lubrication is used under high pressure conditions to prevent metal-to-metal contact.</p> Signup and view all the answers

<p>Pre-requisite: understanding of lubricants and lubrication. Definition: Lubricants are substances that reduce friction. Functions: minimizing wear and tear, dissipating heat, reducing frictional resistance.</p> Signup and view all the answers

<p>The functions of lubricants in machinery and equipment include reducing frictional resistance between moving parts, minimizing wear and tear on surfaces, dissipating heat, and forming a protective layer to prevent direct contact between surfaces.</p> Signup and view all the answers

<p>Extreme pressure lubrication involves the formation of a protective layer that can withstand heavy loads and high pressure between moving parts. This mechanism is significant in industrial applications where heavy machinery and equipment are subjected to extreme pressure and load-bearing conditions.</p> Signup and view all the answers

<p>The properties of lubricants include viscosity, viscosity index, flash and fire point, cloud and pour point, acid value, and saponification value. Viscosity and viscosity index are important considerations because they determine the lubricant's ability to flow and maintain its effectiveness under different temperature and pressure conditions.</p> Signup and view all the answers

<p>Frictional resistance causes wear and tear on the surfaces of moving parts and dissipates a large amount of energy in the form of heat. Lubricants minimize these effects by forming a thin layer between the moving parts, reducing friction, and dissipating heat effectively.</p> Signup and view all the answers

<p>Solid lubricants like graphite and molybdenum disulphide are significant in industrial applications due to their ability to provide effective lubrication in high-temperature and high-pressure environments, where liquid lubricants may not be suitable. They also offer long-lasting lubrication and reduce the need for frequent reapplication.</p> Signup and view all the answers