Question 26Motor Plants - 1st Asst/Chief70% to pass
The piston rod scraper box incorporated in a two-stroke cycle, crosshead diesel engine serves to_______________.
AI Explanation
The correct answer is C) prevent sludge and dirty oil from entering the crankcase.
The piston rod scraper box in a two-stroke cycle, crosshead diesel engine is designed to prevent sludge and dirty oil from the cylinder area from entering the crankcase. This helps maintain the cleanliness of the engine's crankcase and lubricating oil, reducing wear and extending the engine's lifespan.
The other options are incorrect because: A) the scraper box does not eliminate the need for an oil scraper ring, which serves a different purpose; B) the scraper box does not directly prevent side thrust or cylinder scoring; and D) while the scraper box does help remove some deposits, its primary function is to prevent contaminants from entering the crankcase, not to scrape the cylinder walls.
Related Questions
#24 In the illustrated engine, the main camshaft controls the timing of which of the following components? Illustration MO-0003 #25 Which of the listed design features is most common with a two-stroke cycle, low-speed main propulsion diesel engine? #27 In what figure of the illustration does the crosshead experience the greatest side thrust? Illustration MO-0025 #28 There are two glands provided where the piston rod exits the cylinder shown in the illustration. The purpose of the top gland is to_______________. Illustration MO-0083 #29 The lower end of the piston rod, shown in the illustration, is fitted into the_______________. Illustration MO-0003