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Pour point: Just as flashpoint when temperature is further lowered below cloud point of certain temperature, oil becomes semi-solid and losses its flow characteristics. This point is known as pour point. Pour point very much depends on presence of waxes in oil and the molecular structure of particular oil.
Significance:
1. The lubricating oils used in capillary feed system or wicking arrangement should have low pour point.
2. A high pour point leads to the solidification of lubricant that may cause jamming of the machines.
3. Pour point also gives an idea of the lowest temperature at which oil can be transferred by pouring.
4. Pour point determines suitably of the lubricant for low temperature installations which may be required to start and operate at sub-zero temperature.
disadvantages of scale and sludge formation
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What are properties of an ideal electrical insulating material? The properties of an ideal (electrical) insulating material are given below:- (i) Low dielectric court (high
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Emulsification: Emulsification can be defined as the property of oils to get intimately mixed with water easily. Emulsions can be oil in water emulsion or water in oil emulsion. C
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Calculate ?G of Eqs?IX-1 and IX-2 for the case of n-octane and plot against r over the range r=5 to 3ooA and for the two cases of x=2 and x=250.Assume 20? IX-1:?G=-n?µ+4pr2? IX-2:?
1. Select a process variable (pressure / temperature / level / flow) and conduct a literature survey to determine recent developments in process instrumentation field. Ide
objective of the nasic test
A large tower is to be supported by a series of steel wires; it is estimated that the load on every wire will be 13,300 N (3000 lbf). Verify the minimum needed wire diameter, assum
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