What is the thickness in mm of the overlay which is provided on the bearings?(a) 0.01-0.02(b) 0.03-0.04(c) 0.05-0.06(d) 0.07-0.08This question was addressed to me in final exam.This is a very interesting question from Valve Timing Technologies topic in section Valve Timing Technologies of Automotive Engine Design

What is the thickness in mm of the overlay which is provided on the be

1.	What is the thickness in mm of the overlay which is provided on the bearings?(a) 0.01-0.02(b) 0.03-0.04(c) 0.05-0.06(d) 0.07-0.08This question was addressed to me in final exam.This is a very interesting question from Valve Timing Technologies topic in section Valve Timing Technologies of Automotive Engine Design
Answer» The correct OPTION is (a) 0.01-0.02 Best explanation: The thickness of the overlay or the third layer of Babbit is USED on top of the copper-lead and ALUMINUM bearings. Due to overlay, which is 0.01-0.02 mm thick, such bearings are EXPENSIVE.

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