Question 10Motor Plants - 1st Asst/Chief

70% to pass

Which of the following procedures should be carried out to permit the continued operation of a crosshead engine with a leaky aftercooler?

ABypass the aftercooler to operate at sea speed.
BSwitch to diesel fuel and run at reduced speed.
CNothing needs to be done due to the low heating value of heavy fuel.
DBlank off the cooling water lines and run at reduced speed.
AI Explanation

The correct answer is D) Blank off the cooling water lines and run at reduced speed. This is the correct procedure because a leaky aftercooler on a crosshead engine can lead to contamination of the engine lubricating oil, which could cause significant damage if not addressed. Bypassing the aftercooler or switching to diesel fuel would not resolve the underlying issue. The proper course of action is to blank off the cooling water lines to the aftercooler and operate the engine at a reduced speed to minimize the impact of the leak until the aftercooler can be repaired or replaced. The other answer choices are incorrect because they do not address the root problem or could potentially cause further damage to the engine.

Related Questions
Q@q.QuestionNumber:The intake and exhaust valves used in a diesel engine are returned to their seat... Q@q.QuestionNumber:The component identified as item #15 is used to _______________. Illustration MO... Q@q.QuestionNumber:When is fuel injected into a cylinder of diesel engines? Q@q.QuestionNumber:Which of the following would indicate a scavenging air fire in a slow speed dies... Q@q.QuestionNumber:Which of the following statements describes the function of the device labeled "...

Ready to test your knowledge?

Take a Motor Plants - 1st Asst/Chief Practice Exam
Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
← Previous All Questions Next →

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience.

Get the App