Technical and published material
Mechanical reasoning
Reading a mechanical arrangement — a lever, a pulley system, a belt or gear drive, a fluid ram — and working out what it does before it is operated.
Exams on RankHigh that test this
What follows is our approach, not an official rule. What each question type measures is set by the body that runs the examination. How to work one is RankHigh’s method — it is what a good tutor would tell you, and there is more than one way to be right. Where an examination publishes its own instructions, those govern on the day.
Working out what a machine does — a lever, a pulley hoist, a belt drive, a gear train, a fluid ram — from a diagram and a few numbers, before anybody turns it on.
Where people lose it
Counting pulleys instead of counting the rope parts that carry the load. A fixed pulley changes the direction of your pull and multiplies nothing; only a movable one multiplies force. Candidates who count wheels get a consistent, confident, wrong answer.
How to work itRankHigh method
- Name the parts first. Which is the effort, which is the load, and where is the pivot or the fixed point.
- For a lever, take moments: effort times its distance equals load times its distance. That single equation covers all three lever classes.
- For a hoist, count the rope sections actually supporting the load. That number IS the advantage, and it is also how many feet of rope you pull per foot of lift.
- For gears and belts, do direction and speed as two separate questions. Meshed gears alternate direction, so only the NUMBER of meshes decides which way the last one turns; the tooth counts decide the speed and nothing else.
- For fluid, remember pressure is the same throughout, so force follows piston area.
Nothing here needs physics you were taught. It needs you to read the diagram slowly and say out loud what each part is doing.
Practice it on your own exam
Method only sticks against real questions. Every exam in the catalog opens with a free twelve-question diagnostic — in your browser, with a worked explanation for every answer, and no signup.
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