[Level 1 Mechanical Comprehension: Study Guide - 2nd one] Does this illustration make sense?

You're likely overthinking the technical drawing and underestimating how these tests are written. In many aptitude tests, the illustrations aren't blueprints; they're simplified diagrams. If the line represents a rope and it's looping under a wheel, the test assumes that wheel is a functional pulley, even if the drawing looks like it's floating or missing a hook. To find the mechanical advantage quickly, don't worry about whether the pulley is "properly" anchored. Instead, count every single segment of rope that pulls upward on the load. If there are three vertical lines supporting the weight, the mechanical advantage is three. It doesn't matter if the drawing is sloppy; the logic usually follows this simple counting rule. Regarding your assumption: you're correct that you need at least one movable pulley to get a mechanical advantage. If the pulley moves with the load, it splits the weight between the rope segments. If the illustration shows a pulley moving up and down with the weight, it's a movable pulley by definition in the context of this test. Your best bet is to stop looking for errors in the art and start looking for the pattern the test wants. If the answer key says C, it's because they counted three supporting ropes. Treat these diagrams as symbols rather than realistic engineering sketches. This mindset will save you a lot of frustration during the actual exam.