Question 116General Subjects - Assistant Engineer

The correct answer is B) neglecting to close the vent shell. When starting up the unit shown in the illustration, it is crucial to ensure that the vent shell is properly closed. Failure to do so will prevent the establishment of sufficient vacuum, which is necessary for the unit to function correctly. Without the proper vacuum, the distillation process will be disrupted, leading to the failure to start up the unit. The other options are incorrect because they do not directly address the issue of vacuum creation. Improper operation of the brine pump (A) or distillate pump (C) may affect the overall performance of the unit, but they do not specifically impact the vacuum creation. Neglecting to latch the dump valve (D) is also not the primary cause of the failure to establish sufficient vacuum.