Question 86General Subjects - 1st Asst/Chief70% to pass
The thickest deposit of scale in a flash evaporator is most likely to occur in the tubes of the _______________.
AI Explanation
The correct answer is B) saltwater feed heater.
The saltwater feed heater is the most likely location for the thickest deposit of scale in a flash evaporator. This is because the saltwater feed heater is the component where the seawater is heated to the required temperature before entering the flash chamber. As the seawater is heated, dissolved minerals and salts tend to precipitate out and form scale deposits, which accumulate most heavily in the tubes of the feed heater.
The other options are less likely locations for the thickest scale deposits. The distillate cooler (A) and the first-stage condenser (D) handle the freshwater product, which has a lower mineral content. The flash chamber (C) operates at a lower temperature, so scale formation is less prominent in this component.
Related Questions
#84 Sacrificial zinc anodes are used on the saltwater side of heat exchangers to _______________.#85 The floating end of a shell-and-tube type cooler utilizes a packing ring to _______________.#87 On which of the following heated surfaces of a flash type evaporator would you be more likely to find soft scale formation? #88 In the operation of a two-stage flash type distilling plant, the rate of scale formation is greatly reduced by _______________.#89 What component of a reverse-osmosis freshwater generator could be isolated and replaced with the unit remaining in service?