16/12/2019 Simple Machines (STUDY BY TOPICS JUNIOR CLASS) 16/12/2019 0Comments by Gate Academy Welcome to your Simple Machines (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. We can’t perform grinding operation in a drilling machine. True False 2. Leverage is the ratio of load arm to effort arm. True False 3. If the relative motions of the rigid bodies are in one plane or in parallel planes, then the mechanism is called spatial mechanism planar mechanism flexure mechanism spherical mechanism 4. 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. 8.12 8.51 9.51 9.12 5. All of these are examples of inclined planes except: Ramp Hatchet Wheel Staircase 6. Hooke’s universal joint is an example of spatial mechanism. False True 7. A bottle opener belongs to which class of the levers. Resistance in the middle Effort in the middle Fulcrum in the middle None of the mentioned 8. What 2 simple machines make up a pair of scissors? Screw and incline plane Pulley and wheel and axle Wedge and lever None of the above 9. The drilling machine was primarily designed to originate a _____ none of the mentioned taper surface flat surface cylindrical surface 10. 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. 1000m 100mm 10000mm 10mm 11. Fulcrum can be located at one end of the lever. True False 12. 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. 5.1 6.8 5.8 6.1 13. These two simple machines make a screw: Wheel and axle and inclined plane Lever and wedge Pulley and lever Inclined plane and wedge 14. Floating holder is included in______ method of tool holding devices. by directly fitting in the spindle by a socket by special attachments none of the mentioned 15. The formula for the mechanical advantage of an inclined plane is: Distance divided by height Height divided by distance Input arm divided by the output arm Output arm divided by input arm 16. Ball bearing is used to reduce adhension tension viscosity friction 17. The following can be used to raise a load except axle screw effort wheel 18. The pivot point of a lever is called a ____________________. 19. Tapping attachment is included in_______ method of tool holding devices. none of the mentioned by chucks by a sleeve by directly fitting in the spindle 20. . Of a machine is the ratio of distance moved by the effort to distance moved by load mechanical advantage velocity ratio efficiency 1 out of 20 Time is Up! Time's up