Identify the accurate statement regarding distillation column components and operation.

Explanation

Option A correctly states that vertical condensers are preferred for vapor condensation without sub-cooling. Option B highlights the role of weep holes in draining residual liquid from trays during shutdown. Option C explains the benefits of random packing over structured packing in terms of pressure drop and throughput. Option D is accurate because risers are generally attached to trays without the use of bolts, rivets, or welding to allow for thermal expansion and ease of maintenance. Option E is incorrect as sub-cooling is not mandatory in all condensers.