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Starting friction is low in
- a)hydrostatic lubrication
- b)hydrodynamic lubrication
- c)mixed (or semi fluid) lubrication
- d)boundary lubrication
Correct answer is option 'A'. Can you explain this answer?
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Starting friction is low ina)hydrostatic lubricationb)hydrodynamic lub...
Explanation:
Friction is a force that opposes the relative motion of surfaces in contact. Lubrication is the process of reducing friction between two surfaces in contact by introducing a lubricant between them. There are four types of lubrication: hydrostatic lubrication, hydrodynamic lubrication, mixed (or semi-fluid) lubrication, and boundary lubrication. Among these, hydrostatic lubrication has the lowest starting friction.
Hydrostatic Lubrication:
Hydrostatic lubrication is a type of lubrication in which a lubricant is introduced between two surfaces in contact under pressure. In this type of lubrication, the lubricant is supplied to the bearing through a high-pressure pump or other means. The pressure of the lubricant causes it to flow between the surfaces, creating a film that separates them. This film of lubricant reduces the friction between the surfaces, which in turn reduces wear and tear on the surfaces.
Low Starting Friction:
The starting friction is the friction that must be overcome to initiate motion between two surfaces in contact. In hydrostatic lubrication, the starting friction is low because of the following reasons:
- The lubricant is supplied under pressure, which creates a film between the surfaces. This film reduces the contact between the surfaces, which in turn reduces the friction.
- The lubricant used in hydrostatic lubrication is usually a high-viscosity oil or grease. This type of lubricant has high film strength, which means that it can withstand high pressure without breaking down. This property also helps to reduce the starting friction.
- In hydrostatic lubrication, the bearing surfaces are separated by a film of lubricant, which means that there is no direct contact between them. This reduces the friction and also reduces wear and tear on the surfaces.
Conclusion:
In conclusion, hydrostatic lubrication has the lowest starting friction among the four types of lubrication. This is because the lubricant is supplied under pressure, which creates a film between the surfaces. The lubricant used is usually a high-viscosity oil or grease with high film strength, which can withstand high pressure without breaking down. The bearing surfaces are separated by a film of lubricant, which reduces the friction and wear and tear on the surfaces.
Friction is a force that opposes the relative motion of surfaces in contact. Lubrication is the process of reducing friction between two surfaces in contact by introducing a lubricant between them. There are four types of lubrication: hydrostatic lubrication, hydrodynamic lubrication, mixed (or semi-fluid) lubrication, and boundary lubrication. Among these, hydrostatic lubrication has the lowest starting friction.
Hydrostatic Lubrication:
Hydrostatic lubrication is a type of lubrication in which a lubricant is introduced between two surfaces in contact under pressure. In this type of lubrication, the lubricant is supplied to the bearing through a high-pressure pump or other means. The pressure of the lubricant causes it to flow between the surfaces, creating a film that separates them. This film of lubricant reduces the friction between the surfaces, which in turn reduces wear and tear on the surfaces.
Low Starting Friction:
The starting friction is the friction that must be overcome to initiate motion between two surfaces in contact. In hydrostatic lubrication, the starting friction is low because of the following reasons:
- The lubricant is supplied under pressure, which creates a film between the surfaces. This film reduces the contact between the surfaces, which in turn reduces the friction.
- The lubricant used in hydrostatic lubrication is usually a high-viscosity oil or grease. This type of lubricant has high film strength, which means that it can withstand high pressure without breaking down. This property also helps to reduce the starting friction.
- In hydrostatic lubrication, the bearing surfaces are separated by a film of lubricant, which means that there is no direct contact between them. This reduces the friction and also reduces wear and tear on the surfaces.
Conclusion:
In conclusion, hydrostatic lubrication has the lowest starting friction among the four types of lubrication. This is because the lubricant is supplied under pressure, which creates a film between the surfaces. The lubricant used is usually a high-viscosity oil or grease with high film strength, which can withstand high pressure without breaking down. The bearing surfaces are separated by a film of lubricant, which reduces the friction and wear and tear on the surfaces.
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Starting friction is low ina)hydrostatic lubricationb)hydrodynamic lubricationc)mixed (or semi fluid) lubricationd)boundary lubricationCorrect answer is option 'A'. Can you explain this answer?
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