Q. Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is

• (A) Vertical heat exchanger with steam on tube side
• (B) Vertical heat exchanger with steam on shell side
• (C) Horizontal heat exchanger with steam on tube side
• (D) Horizontal heat exchanger with steam on shell side