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Machine Design 1: Design Against Static Load
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Machine Design 1: Design Against Static Load
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25 Questions

1. Which of the following are important parts of knuckle joint?
2. Which equations can be used to find the resisting force in the two welds?
3. What kind of stresses does the welded joint undergo?
4. A knuckle joint can be used in valve mechanism of a reciprocating engine.
5. A power screw has no problem of wear as there is very less amount of friction associated.
6. Calculate the diameter of pin from shear consideration with maximum shear stress allowed is 40NN/mm² and an axial tensile force of 50kN is acting on the rod.
7. If any cross section is subjected to direct tensile stress and bending stress, then find the dimension of cross section. Given length & breadth are t and 2t respectively. F=25kN acts on the top fibre of the cross section, M=F x t . Also maximum allowable tensile stress =100N/mm².
8. If joint is to fail by crushing of socket collar then estimate the diameter of socket collar. Given Permissible compressive stress= 126.67 N/mm².; Spigot dia=65mm; thickness 0f collar=15mm
9. A power screw is only used to convert rotary motion into linear motion and not for transmitting power.
10. In cold riveting like hot riveting shank is subjected to majorly tensile stress.
11. A knuckle joint is unsuitable for two rotating shafts, which transmit torque
12. Tr 40 x 14(P 7), here 14 indicates
13. Answer the question 21-27 with respect to figure 121. The two welds shown in the figure experience equal resisting force?
14. Nominal diameter of the screw thread is the same as core diameter.
15. Trapezoidal threads are better than square threads as there is radial pressure or side thrust on the nut.
16. The following welded joint is an example of
17. Cotter joint is used when the members are subjected to which type of stresses?
18. A maximum of how many roads may be connected using a knuckle joint?
19. Depending upon the holding arrangement, power screws operate in how many different arrangements.
20. The moment of forces about the CG is ?
21. A knuckle joint is also called socket pin joint.
22. Which of the following are true for buttress threads?
23. Calculate the direct shear stress in the welds by ignoring torsional shear stress if P=8kN and thickness of weld is 5mm.
24. Find the length of weld 2 required to with stand the load of 100kN. Permissible shear stress in weld is 70kN/mm².
25. Cold riveting holds the connected parts better than hot riveting.

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