In an IC engine, boundary lubrication
is likely to occur between surfaces with relative velocity during :
एक आईसी इंजन में, सापेक्ष वेग के साथ सतहों के बीच सीमा स्नेहन होने की संभावना है:
Idling
Starting and stopping
Constant speed operation
Maximum power condition
Maximum power condition
●In an IC engine, boundary lubrication
is likely to occur between surfaces with relative velocity during maximum power
condition.
●As the viscosity or the relative
velocity are increased, a mixed mode of lubrication is observed, in which more
lubricant pockets and less asperity contact are found.
●When the oil film thickness to
surface roughness ratio is less than unity, boundary lubrication is present.
Hence, the correct option is (D).
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