Question 603Steam Plants - Assistant Engineer70% to pass
The maximum lube oil temperature leaving a large, main propulsion steam turbine bearing should _______________.
AI Explanation
The correct answer is C) never exceed 170°F.
The reason this is the correct answer is that the maximum allowable lube oil temperature leaving a large, main propulsion steam turbine bearing is typically limited to 170°F by industry standards and regulations. Exceeding this temperature can lead to increased wear and damage to the turbine bearings and other components.
The other answer choices are incorrect because: A) maintaining a fixed temperature of 130°F may not be practical or necessary for all steam turbine systems; B) the lube oil outlet temperature from the centrifugal purifier is not directly related to the maximum allowable temperature from the turbine bearing; and D) a temperature rise of more than 70°F above the inlet temperature could potentially exceed the 170°F limit.
Related Questions
#601 When the flow of oil admitted to a disk-type centrifugal purifier is in excess of its designed capacity, which of the following conditions will usually occur? #602 Which of the following problems will occur if a manually cleaned disk-type centrifugal lube oil purifier contains insufficient sealing water prior to admitting oil flow to the bowl? #604 Water retained in the lube oil system of a main propulsion turbine installation is undesirable because it _______________.#605 If salt water leaks into and contaminates the main lubricating oil system, which of the following remedial actions should be taken? #606 Which of the following conditions may exist if you detect an excessive amount of metal particles on a main engine lube oil strainer magnet?