Welcome to your Simple Machines (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. For drilling operation, the drill rotates with_____ pressure if job is held on earth45 degree inclined to both planesupwarddownwardnone of the mentioned2. How many classes of levers are there?54323. Pliers is an example of what class of leversecond class leverfifth class leverfourth class leverfirst class lever4. In drilling operation, work should be held by hand.FalseTrue5. Tapping attachment is included in_______ method of tool holding devices.by chucksby a sleeveby directly fitting in the spindlenone of the mentioned6. Leverage is the ratio of load arm to effort arm.TrueFalse7. Fulcrum can be located at one end of the lever.TrueFalse8. What 2 simple machines make up a pair of scissors?Wedge and leverScrew and incline planePulley and wheel and axleNone of the above9. What is the definition of a screw?A screw is not a simple machine.An inclined plane wrapped around a cylinder.A flat sloped surface.Something that holds wood together.10. These two simple machines make a screw:Inclined plane and wedgeWheel and axle and inclined planeLever and wedgePulley and lever11. The pivot point of a lever is called a ____________________. 12. Planar mechanisms are ___________ dimensional whereas spatial mechanisms are ___________ dimensional.2, 12, 33, 21, 213. A bottle opener belongs to which class of the levers.Resistance in the middleFulcrum in the middleNone of the mentionedEffort in the middle14. Hooke’s universal joint is an example of spatial mechanism.FalseTrue15. A heavy object could be rolled up this simple machine, instead of lifting it straight up. Using this simple machine can save effort, although the object must usually cover more distance if this simple machine is used.Incline planeScrewWedgeSimple Machine16. The following can be used to raise a load exceptwheeleffortaxlescrew17. If the relative motions of the rigid bodies are in one plane or in parallel planes, then the mechanism is calledspherical mechanismspatial mechanismplanar mechanismflexure mechanism18. The formula for the mechanical advantage of an inclined plane is:Output arm divided by input armHeight divided by distanceInput arm divided by the output armDistance divided by height19. What is used to make holes in hard objectswheelscrewaxletonge20. A baseball bat is an example of this class of lever:Second-classFourth-classThird-classFirst-class21 out of 20Time is Up!