For which to which part is the hole drilled for lubrication in a connecting rod?(a) Piston to crankshaft(b) Piston to connecting rod(c) Small end to big end of the connecting rod(d) Only in pistonI had been asked this question in unit test.I'd like to ask this question from Engine Components in division Basic Engine Components of Automotive Engine Design

For which to which part is the hole drilled for lubrication in a conne

1.	For which to which part is the hole drilled for lubrication in a connecting rod?(a) Piston to crankshaft(b) Piston to connecting rod(c) Small end to big end of the connecting rod(d) Only in pistonI had been asked this question in unit test.I'd like to ask this question from Engine Components in division Basic Engine Components of Automotive Engine Design
Answer» Right option is (c) Small end to big end of the CONNECTING ROD The explanation is: For lubrication, a rifle HOLE is drilled from the small end of the connecting rod to the big end of the connecting rod. The oil is lifted from the crankcase with higher PRESSURE and lubricates cylinder through oil rings.

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