Question 320Steam Plants - 1st Asst/Chief
70% to passMost auxiliary turbine feed pumps do not require an external source of gland sealing steam because they _______________.
Aoperate with only a small amount of axial thrust
Boperate at relatively low pressures
Cutilize carbon packing rings at the low pressure end
Dexhaust to pressures above atmospheric pressure
AI Explanation
The correct answer is D) exhaust to pressures above atmospheric pressure. Auxiliary turbine feed pumps, which are used to supply water to the boiler, do not require an external source of gland sealing steam because they exhaust to pressures above atmospheric pressure. This means that the pressure at the pump's exhaust is high enough to provide the necessary gland sealing without the need for additional steam. The other answer choices, while potentially relevant to turbine feed pumps in general, do not directly address the issue of gland sealing requirements.
Related Questions
Q@q.QuestionNumber:When operating under constant load, the superheated steam temperature may rise a... Q@q.QuestionNumber:Excess free oxygen in the boiler feed water can be the result of _______________... Q@q.QuestionNumber:If the main propulsion turbine begins to vibrate severely while you are increasi... Q@q.QuestionNumber:In a coil-type forced circulation auxiliary water-tube boiler, _______________. Q@q.QuestionNumber:When turbine rotor shafts extend through the casing, an external source of seali...
Ready to test your knowledge?
Take a Steam Plants - 1st Asst/Chief Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App