Q. Pick out the wrong statement.

• (A) Film boiling is desirable in commercial equipments due to high heat transfer rate at low temperature drop
• (B) Steam condensate is corrosive because of the presence of dissolved oxygen in it
• (C) An underdesigned steam trap will back up the condensate instead of discharging it out
• (D) By increasing the number of shell passes, the temperature cross in a shell and tube heat exchanger can be prevented