FCTC TEST PREP QUESTIONS WITH CORRECT ANSWERS

A belt and pulley system is characterized by - Answer two or more pulleys in common to a belt. What does a belt and pulley system allow for? - Answer mechanical power, torque, and speed to be transmitted across axles How is mechanical advantage realized? - Answer if the pulleys are different diameters what is a pulley? - Answer a wheel on an axle or shaft that is designed to support movement and change of direction of a cable or belt along its circumference Why are pulleys used? - Answer lift loads apply forces trasmit power What is usually the drive element of a pulley? - Answer rope, cable, belt or chain that runs over the pulley inside the groove Pulleys are assembled to form what - Answer a block and tackle in order to provide mechanical advantage to apply large forces rope and pulley systems (block and tackle) are characterized by what? - Answer the use of a single continuous rope to transmit a tension force around one or more pulleys to lift or move a load the rope may be a light line or a strong cable What is the mechanical advantage of a rope and pulley system if it does not dissipate or store energy? - Answer the number of parts of the rope that act on the load What is a lever? - Answer a machine consisting of a beam or rigid rod pivoted at a fixed hinge or fulcrum How do levers work? - Answer amplifies an input force to provide a greater output force, which is said to provide leverage what is the mechanical advantage of a lever? - Answer the ratio or the output force to the input force How are levers classified? - Answer by relative positions of the fulcrum and the input and output forces. allows identification by the relative locations of the fulcrum, the resistance, and the effort. Class 1 Lever - Answer Fulcrum in the middle the effort is applied on one side of the fulcrum and the resistance on the other side.