Well if it is not in an LO, yes. But be aware the CAA have been known to stretch the application of LOs in the past to avoid giving in to appeals. The LOs themselves are a root part of the problem, they completely lack depth of knowledge indicators and do not give references. Thus 'Describe a simple hydraulic system' could have an infinity of meanings depending on your interpretation of 'describe', 'simple' and 'system'. 'Hydraulic' too for that matter.