16/12/2019Simple Machines (STUDY BY TOPICS JUNIOR CLASS) 0Comments by Gate Academy Welcome to your Simple Machines (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. What simple machine combines with itself to make a wedge?Inclined planeLeverGearWheel and axle2. The pivot point of a lever is called a ____________________.3. What 2 simple machines make up a pair of scissors?Wedge and leverNone of the abovePulley and wheel and axleScrew and incline plane4. Which of the following device is not used for holding the work in a drilling machine?none of the mentionedstep blockboth step block and drill jigsdrill jigs5. Planar mechanisms are ___________ dimensional whereas spatial mechanisms are ___________ dimensional.3, 22, 31, 22, 16. Pliers is an example of what class of leverfourth class leverfirst class leversecond class leverfifth class lever7. There are how many classes of levers 34128. A _________________is used to hold things together. This is described as an incline plane wrapped around a cylinder.9. For drilling operation, the drill rotates with_____ pressure if job is held on earthdownward45 degree inclined to both planesupwardnone of the mentioned10. The critical value at which crack extension occurs is calledNone of the mentionedToughnessStress Intensity FactorFracture Toughness11. A right angled bell-crank is designed to raise a load of 5kN at short arm whose length is 100mm. Longer arm is of length 500mm. Calculate the reaction or force acting on the fulcrum.5.15.86.86.112. A right angled bell-crank is designed to raise a load of 5kN at short arm whose length is 100mm. Also longer arm is of length 500mm. If permissible bearing pressure on pin is 10N/mm² and diameter of the 20mm, find the shear stress in the pin.9.519.128.518.1213. The formula for the mechanical advantage of an inclined plane is:Distance divided by heightHeight divided by distanceOutput arm divided by input armInput arm divided by the output arm14. Fulcrum can be located at one end of the lever.FalseTrue15. A mechanism where there are no restrictions on the relative motion between the particles, the mechanism is calledspherical mechanismplanar mechanismspatial mechanismflexure mechanism16. What is the definition of a screw?An inclined plane wrapped around a cylinder.Something that holds wood together.A flat sloped surface.A screw is not a simple machine.17. In a mechanical system, if the bodies move in a way such that the trajectories of points in the system lie on concentric sphere, then the mechanism is calledspherical mechanismspatial mechanismflexure mechanismplanar mechanism18. What is used to make holes in hard objectsscrewtongewheelaxle19. Which of the following method is not used for holding tool?by chucksby a sleevenone of the mentionedby a socket20. Hooke’s universal joint is an example of spatial mechanism.TrueFalse21 out of 20Time is Up!
