Question 94General Subjects - Assistant Engineer70% to pass
While standing watch in the engine room, you notice a high reading at a salinity cell located in the loop seal between two stages of a flash type evaporator. This would indicate _______________.
AI Explanation
The correct answer is D) carryover in the first-stage.
A high salinity reading at the salinity cell located in the loop seal between the two stages of a flash type evaporator would indicate carryover of brine from the first-stage to the second-stage. This occurs when the brine level in the first-stage is too high, causing excessive entrainment of brine droplets into the vapor that is fed to the second-stage. This carryover contaminates the freshwater being produced in the second-stage.
The other answer choices are incorrect because:
A) A high salinity reading is not indicative of a faulty brine overboard pump.
B) Chill shocking is used to remove scale, not to address carryover issues.
C) A high salinity reading would not directly indicate a leak at the second-stage condenser.
Related Questions
#92 Scale formation in a flash-type evaporator is usually found in the _______________.#93 If a higher than normal water level is observed through the inspection port of a flash evaporator, you should suspect _______________.#95 Indicated high salinity of the distillate discharged from a flash-type distilling plant will be a result of _______________.#96 Small droplets of water entrained in the flashed vapor produced in a flash-type evaporator are removed by the _______________.#97 A vacuum is initially created in a flash-type distilling plant by _______________.