Welcome to your Simple Machines (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. Which mechanism is shown in the given diagram? spherical spatial planar flexure 2. Which of the following are not included under planar mechanisms? Hooke’s universal joint Plane four bar linkage Slide crank mechanism Plate cam and follower 3. The formula for the mechanical advantage of an inclined plane is: Height divided by distance Input arm divided by the output arm Output arm divided by input arm Distance divided by height 4. What 2 simple machines make up a pair of scissors? Screw and incline plane Pulley and wheel and axle None of the above Wedge and lever 5. In drilling operation, work should be held by hand. True False 6. 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. 35.5mm 20mm 25.5mm 30mm 7. These two simple machines make a screw: Wheel and axle and inclined plane Pulley and lever Inclined plane and wedge Lever and wedge 8. 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 called spatial mechanism planar mechanism flexure mechanism spherical mechanism 9. What is the definition of a screw? A screw is not a simple machine. An inclined plane wrapped around a cylinder. Something that holds wood together. A flat sloped surface. 10. Ball bearing is used to reduce adhension viscosity friction tension 11. Hooke’s universal joint is an example of spatial mechanism. False True 12. A baseball bat is an example of this class of lever: Third-class Second-class Fourth-class First-class 13. Which of the following device is not used for holding the work in a drilling machine? drill jigs none of the mentioned step block both step block and drill jigs 14. Floating holder is included in______ method of tool holding devices. by directly fitting in the spindle by special attachments none of the mentioned by a socket 15. For drilling operation, the drill rotates with_____ pressure if job is held on earth downward upward none of the mentioned 45 degree inclined to both planes 16. What is used to make holes in hard objects screw wheel axle tonge 17. The critical value at which crack extension occurs is called Stress Intensity Factor None of the mentioned Toughness Fracture Toughness 18. There are how many classes of levers 2 3 4 1 19. When the load is between the fulcrum and the effort it is fourth class lever first class lever second class lever fifth class lever 20. The bottom of a light bulb is what type of simple machine? Wedge Pulley Complex machine Screw 1 out of 20 Time is Up! Time's up
