Question

A crosshead pin for a large bore 2-stroke diesel engine has to be refurbished following bearing failure. The surface finish required is measured as a centre line average, CLA. Select, from the options given, the standard of finish that should be achieved during the refurbishment

A. 2.5 micron CLA
B. 2.0 micron CLA
C. 1.5 micron CLA
D. 3.5 micron CLA

Answer 1

The required standard of finish for refurbishing the crosshead pin is b. 2.0 micron CLA.

Step-by-step explanation:

The correct standard of finish that should be achieved during the refurbishment of the crosshead pin for the 2-stroke diesel engine is 2.0 micron CLA. Centre Line Average (CLA) is a measure of the surface roughness and is commonly used to specify the required finish in engineering applications. A lower CLA value indicates a smoother surface finish. In this case, a finish of 2.0 micron CLA is the desired standard for the refurbished pin.