Welcome to your Simple Machines (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. . Of a machine is the ratio of distance moved by the effort to distance moved by loadmechanical advantagevelocity ratioefficiency2. 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 length of the pin.35.5mm30mm25.5mm20mm3. Planar mechanisms are ___________ dimensional whereas spatial mechanisms are ___________ dimensional.3, 22, 11, 22, 34. Leverage is the ratio of load arm to effort arm.FalseTrue5. The distance between fulcrum and dead weights is 100mm. Dead weights are of 2945.2N. An effort of 294.52N acts on the other hand. Find the distance between the fulcrum and other end of the lever.1000m100mm10mm10000mm6. In drilling operation, work should be held by hand.TrueFalse7. Fulcrum can be located at one end of the lever.TrueFalse8. 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 mechanism9. What is the definition of a screw?Something that holds wood together.A screw is not a simple machine.A flat sloped surface.An inclined plane wrapped around a cylinder.10. The following can be used to raise a load exceptwheelaxlescreweffort11. How does a ramp make work easier?It helps hold a door open so I don't have to.It spreads the work out over a longer distance.None of theseYou can ride your skateboard up it, rather than walking up the stairs12. Which of the following are not included under planar mechanisms?Plate cam and followerHooke’s universal jointSlide crank mechanismPlane four bar linkage13. If the link next to the shortest link is fixed, what type of mechanism is obtained?Double rocker mechanismLinkage is not planarDouble crank mechanismCrank rocker mechanism14. Which of the following method is not used for holding tool?none of the mentionedby a sleeveby a socketby chucks15. A mechanism where there are no restrictions on the relative motion between the particles, the mechanism is calledflexure mechanismspatial mechanismspherical mechanismplanar mechanism16. 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.18.104.22.168.117. All of these are examples of inclined planes except:WheelHatchetRampStaircase18. These two simple machines make a screw:Pulley and leverWheel and axle and inclined planeInclined plane and wedgeLever and wedge19. Which mechanism is shown in the given diagram?spatialsphericalflexureplanar20. When the load is between the fulcrum and the effort it is first class leverfifth class leverfourth class leversecond class lever21 out of 20Time is Up!