Identify the typical examples of faults in cylinder sleeves and pistons. The symptoms of cavitation erosion appear as small holes on the outer sur...

Identify the typical examples of faults in cylinder sleeves and pistons.

The symptoms of cavitation erosion appear as small holes on the outer surface of the cylinder sleeve that are in contact with the cooling water.
Scratches on the piston are caused by the destruction of the oil film and the piston making metal-to-metal contact with the cylinder sleeve.
The erosion caused by cavitation tends to slow down the flow of water, which in turn accelerates the erosion.
The symptoms of piston jamming appear in the form of jamming lines along part of the piston, particularly in areas that are at right angles to the piston pin.
a) I and II are correct.
b) II and III are correct.
c) III and IV are correct.
d) I and IV are correct.