Question 417General Subjects - Assistant Engineer
70% to passCharring or glazing of the inner circumference of the packing rings in a centrifugal pump is caused by _______________.
Afailure to seat the packing rings
Bpacking ring rotation
Cunder-tightening the packing
Dinsufficient lubrication of the packing
AI Explanation
The correct answer is D) insufficient lubrication of the packing. Charring or glazing of the inner circumference of the packing rings in a centrifugal pump is caused by insufficient lubrication of the packing. Proper lubrication is essential to reduce friction and heat buildup within the packing, which can lead to this type of damage. Failure to seat the packing rings (A), packing ring rotation (B), or under-tightening the packing (C) can also contribute to issues, but insufficient lubrication is the primary cause of the charring or glazing described in the question.
Related Questions
Q@q.QuestionNumber:Which of the following statements will be true if the position of the manual con... Q@q.QuestionNumber:Monel metal is an alloy composed mainly of _______________. Q@q.QuestionNumber:Of the following propulsion modes, which one would operate with a geared-drive f... Q@q.QuestionNumber:If one drive belt on an air compressor is found to be worn you should __________... Q@q.QuestionNumber:Under what conditions is it permissible to pump machinery space bilges directly ...
Ready to test your knowledge?
Take a General Subjects - Assistant Engineer Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App