The time-poor candidate should get a hold of "Examination Intensive Care Medicine, 2nd Edition" by Carole Foot et al. This book comes with a DVD which contains detailed information on the routinely used ICU equipment, all presented in an easily digested format. This is the best resource for detailed short-form notes on equipment and procedures.
Oh's Intensive Care manual has little on the topic of ICU procedures and equipment. It will not be helpful here. Instead, one should turn to the most recent edition of Dorsch and Dorsch's Understanding Anaesthesia Equipment. This will cover the airway and gas material. A passing familiarity is all that is required.
Summaries and discussions of critical care equipment and procedures from Life in the Fast Lane are made available as a list of links in the Resources section.