Question 461Motor Plants - Assistant Engineer

The correct answer is A) The activation of the salinity monitoring equipment's annunciator circuit. A large condenser tube leak within the distiller would allow seawater to mix with the distillate, increasing the salinity of the distillate. This would trigger the activation of the salinity monitoring equipment's annunciator circuit, which is designed to detect and alert the operator to such a leak. The other options are incorrect because: B) A decrease in the main engine expansion tank level is not directly related to a condenser tube leak in the distiller. C) An increase in distiller output is not a reliable indicator of a condenser tube leak. D) A rise in the lube oil cooler outlet temperature is not caused by a condenser tube leak in the distiller.