Question 264Steam Plants - 1st Asst/Chief70% to pass
If the salinity indicator periodically registers high salinity in the main hotwell, the cause may be _______________.
AI Explanation
The correct answer is A) a contaminated distilled water tank.
The high salinity reading in the main hotwell indicates that there is saltwater contamination in the freshwater system. The most likely cause of this is a leaking or contaminated distilled water tank, which is the source of freshwater for the main hotwell. Leaks in the air ejector condenser, excessive water pressure in the lube oil cooler, or leaks in the third-stage heater would not directly introduce saltwater into the freshwater system and cause high salinity readings.
Maintaining proper salinity levels in the main hotwell is critical for proper operation of the steam plant, so identifying and resolving issues with the distilled water supply is the appropriate troubleshooting step.
Related Questions
#262 If the cooling water flow through the air ejector inter condensers and after condensers is inadequate, which of the problems listed will occur? #263 On a steam turbine vessel with a propeller type, electrically driven, main circulating pump, one suspects condenser tube or inlet tube sheet fouling. Do not consider vacuum variations since they may be due to sea water temperatures. What on-board electrical test instrument can one use to verify condenser fouling? #265 Dissolved oxygen in the condensate can result from _______________.#266 While underway, the boiler water level in a steaming boiler begins dropping rapidly and cannot be kept at the normal level by standard practices. The engineer's next action should be to _______________.#267 Your vessel is steaming full ahead and operating on both boilers. If the boiler water level of one boiler drops out of sight low in the sight glass and the burners have been secured, besides slowing down the main engine, what further action should be taken?