Question

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% copper

The 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 1

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.