Question 98General Subjects - Assistant Engineer70% to pass
The absolute pressure maintained in the shell of the salt water feed heater on most flash evaporators used on steam propelled vessels is _______________.
AI Explanation
The correct answer is B) slightly less than the absolute pressure of the L.P. extraction.
The absolute pressure maintained in the shell of the salt water feed heater on most flash evaporators used on steam-propelled vessels is slightly less than the absolute pressure of the L.P. (low-pressure) extraction. This is because the salt water feed heater is designed to operate at a lower pressure than the L.P. extraction steam, allowing the heat from the L.P. extraction to be effectively transferred to the feed water.
The other options are incorrect because: A) the pressure would not be less than the supplied live steam pressure, C) the pressure would not be lower than the first-stage vacuum, and D) the pressure would not be higher than the second-stage vacuum.
Related Questions
#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 _______________.#99 In the unit illustrated, the feed water temperature is required to be increased to 165°F or greater and must exist at this temperature when leaving _______________. Illustration GS-0053 #100 The brine level in the second-stage of a flash-type evaporator is determined in part by the feed rate, the rate of evaporation in both stages, and the _______________.#101 In a two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?