When inspecting pistons, liners, and rings of a large two-stroke cycle diesel engine through the cylinder ports, a wet piston crown would indicate a __________.

Correct Answer: Option B — leaky fuel injector

Fuel injectors operate at high pressures and can occasionally drip or leak. When inspecting through scavenge ports, a wet piston crown indicates unburned fuel pooling from a leaky injector rather than lube oil or ring failures.