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Class 1 Levers {Ans: Fulcrum is in the middle, with the effort (input) force on one side of the fulcrum and resistance (output) on the other side. Mechanical Advantage greater or less than 1 Ex: Seesaw, Crowbar, Pair of Scissors.}Be mindful of questions with absolutes. What are some absolutes and why watch out for them? {Ans: Examples of absolutes are "absolutely, always, forever, completely, infinite, never, only, sole, undeniable, or wholly". Absolutes or any sort of broad statements should be suspected as wrong.}Belt and Pulley Systems {Ans: Two or more pulleys in common to a belt. If the pulleys are of differing pitch diameters, a mechanical advantage is realized. Doesn't depend on ratio of teeth as with gears and sprockets, only pitch diameter.}What subject should you start with first? {Ans: Start with Recall and Comprehend Technical Information (35 questions) if allowed to. If not, then start with Solving mathematical questions (20 questions).}What is a pulley (also called a "sheave" or "drum") {Ans: A pulley is a wheel on an axle or shaft that is designed to support movement and change in direction of a belt or cable along its circumference.}Class 3 Levers {Ans: Effort