Question 57General Subjects - 1st Asst/Chief70% to pass
Which of the following statements describes the approximate relation between the feed water entering the unit shown in the illustration and brine being removed? Illustration MO-0111
AI Explanation
The correct answer is C) Seventy-five percent of the feed water entering the unit is removed as brine.
In a distillation process, the majority of the feed water (typically around 75%) is removed as brine or concentrated waste, while the remaining 25% is collected as purified distillate. This is because the distillation process is designed to concentrate the impurities and minerals in the feed water, leaving the purified water behind. The higher the concentration of dissolved solids in the feed water, the more brine will need to be removed to maintain the efficiency of the distillation unit.
The other options are incorrect because:
A) The brine is not removed at a faster rate than the feed water entering; the process is designed to maintain a specific ratio of brine removal to feed water input.
B) Twenty-five percent of the feed water is not removed as brine; the majority (around 75%) is removed as brine.
D) The amount of brine leaving is not dependent on a specific device; it is a function of the overall distillation process design and the concentration of dissolved solids in the feed water.
Related Questions
#55 Which of the following statements concerning the systems shown in the illustration is correct? Illustration MO-0111 #56 Which of the valve arrangements listed would be correct for operating the distillation plant shown in the illustration? Illustration MO-0111 #58 The thickest deposit of scale in a flash evaporator is most likely to occur in the tubes of the _______________.#59 The efficiency and output capacity of a low pressure distilling plant will be reduced if the last effect shell _______________.#60 In a flash evaporator, scale as a result of higher than normal temperatures is most likely to occur in the _______________.