Question 436Motor Plants - Assistant Engineer70% to pass
The service life of a worn aluminum piston for an auxiliary diesel, for which no spares are readily available, can be extended by_______________.
AI Explanation
The correct answer is B) knurling the piston skirt surface.
Knurling the piston skirt surface can help extend the service life of a worn aluminum piston when no spare parts are readily available. Knurling creates a roughened surface texture that can help improve oil retention and distribution, reducing wear on the piston skirt. This is a common maintenance practice for extending the lifespan of critical engine components when replacements are not easily obtained.
The other options are not as effective for extending the service life of the piston. Turning down the piston skirt (option A) would reduce the piston diameter, potentially causing clearance issues. Building up the piston skirt with liquid epoxy (option C) may not provide a durable, long-lasting solution. Increasing the dimensions of the ring land grooves (option D) would not address the wear on the piston skirt itself.
Related Questions
#434 Which of the following statements would apply when checking the valve clearance of the unit shown in the illustration? Illustration MO-0074 #435 In an auxiliary diesel engine, one reason for knurling the piston skirt is to _______________.#437 Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must_______________.#438 Sacrificial zinc anodes are used on the salt water side of diesel engine heat exchangers to _______________.#439 If the coolant temperature is too low as it passes through internally cooled fuel injectors, the injectors can be damaged by _______________.