What is the value of silicon and copper in an extra heavy-duty type sealed power bearing?(a) 11% silicon and 1% copper(b) 1% silicon and 11% copper(c) 5% silicon and 10% copper(d) 10% silicon and 5% copperThe question was asked in an interview for internship.I want to ask this question from Valve Timing Technologies topic in portion Valve Timing Technologies of Automotive Engine Design

What is the value of silicon and copper in an extra heavy-duty type se

1.	What is the value of silicon and copper in an extra heavy-duty type sealed power bearing?(a) 11% silicon and 1% copper(b) 1% silicon and 11% copper(c) 5% silicon and 10% copper(d) 10% silicon and 5% copperThe question was asked in an interview for internship.I want to ask this question from Valve Timing Technologies topic in portion Valve Timing Technologies of Automotive Engine Design
Answer» The CORRECT CHOICE is (a) 11% silicon and 1% copper To explain: The EXTRA heavy-duty sealed power bearing is made up of tin flash plate, Babbit over plate, aluminum alloy lobbying, and steel back. This contains 11% silicon, 1% copper, and the remainder aluminum. These alloys do not suffer corrosion as it is copper-based alloy.

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