Question 307Steam Plants - 1st Asst/Chief

70% to pass

If a line shaft bearing begins to overheat, the shaft speed should be reduced. If overheating persists, you should then _______________.

Aapply emergency cooling water externally to the bearing
Bincrease lube oil pressure to the bearing
Cflood the bearing with a higher viscosity oil to provide emergency lubrication and cooling
Ddecrease lube oil pressure to the bearing
AI Explanation

The correct answer is A) apply emergency cooling water externally to the bearing. If a line shaft bearing begins to overheat, the immediate response should be to reduce the shaft speed to decrease the heat generation. If the overheating persists, applying emergency cooling water externally to the bearing is the proper course of action. This helps dissipate the excessive heat buildup and prevent further damage to the bearing. Options B, C, and D are incorrect because increasing lube oil pressure, flooding the bearing with higher viscosity oil, or decreasing lube oil pressure, respectively, would not effectively address the overheating issue. Applying external cooling water is the recommended step to take if the overheating persists after reducing the shaft speed.

Related Questions
Q@q.QuestionNumber:Fuel oil is transferred to the settling tanks for _______________. Q@q.QuestionNumber:Excessive condensate depression can result in _______________. Q@q.QuestionNumber:Which of the listed refractory materials can be used in an area directly exposed... Q@q.QuestionNumber:When installed, the economizer relief valve should always be set _______________... Q@q.QuestionNumber:Oil supply pressure to the main lube oil header of a gravity feed lube oil syste...

Ready to test your knowledge?

Take a Steam 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