Q1: In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be

ANS:A - at ground level.

In a vacuum distillation unit supported by a barometric condenser, the vacuum drum, which collects the distillate, should ideally be located at a height that ensures proper gravity flow of the distillate from the distillation column to the drum. Since the distillation unit is operating under vacuum conditions (at 60 mm Hg), the pressure inside the system is significantly lower than atmospheric pressure. Therefore, to maintain proper pressure differentials and facilitate the flow of distillate, the vacuum drum should be positioned at a higher elevation relative to the ground. The appropriate height for the vacuum drum is typically determined based on the design considerations of the distillation unit and the specifics of the process. However, a general guideline is to position the vacuum drum at a sufficient height above the ground to ensure smooth flow of the distillate. Given the options provided, "5 metres above ground" would likely be a suitable height for the location of the vacuum drum in this scenario. This elevation allows for adequate gravitational force to assist in the collection of the distillate while also providing practical accessibility for operation and maintenance purposes.