Question 14Motor Plants - 1st Asst/Chief70% to pass
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_______________.
AI Explanation
The correct answer is B) leaky fuel injector.
A wet piston crown indicates that fuel is leaking past the fuel injector and entering the cylinder. This could be caused by a faulty or worn fuel injector. The other options are incorrect because:
A) A faulty oil ring would not cause a wet piston crown, but rather poor lubrication and oil buildup.
C) A faulty piston lubricator would also not lead to a wet piston crown, but rather insufficient lubrication.
D) A broken compression ring would allow compression gases to escape, but would not directly result in fuel leakage and a wet piston crown.
Related Questions
#12 The ring lands on a large, low-speed, main propulsion diesel engine piston may crack due to_______________.#13 One method of determining crankshaft misalignment is by_______________.#15 The most practical way of detecting an overload in one cylinder of an operating large, low-speed, main propulsion diesel engine is to_______________.#16 When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will be indicated? #17 If a valve seat insert, similar to that shown in the illustration is cracked, this may be indicated by_______________. Illustration MO-0043