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Machine Design Practice Test: Design Against Static Load
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Avg score: 71% Most missed: “If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/…”
Design Against Static Load topics include: Failure modes and stresses, cotter and knuckle joints, principal and thermal stresses, levers and fracture mechanics. Design against static load should be based on permissible lateral and torsional deflections. Static loads are loads that do not change in magnitude or direction.  Here are some considerations for design against static load: The material is homogeneous. The load is gradually applied. The line of action of force P passes through the geometric axis of the cross-section. The cross-section is uniform. There is no stress... Show more
Machine Design Practice Test: Design Against Static Load
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25 Questions

1. A bottle opener belongs to which class of the levers.
2. In cold riveting like hot riveting shank is subjected to majorly tensile stress.
3. Knuckle Joint can’t be used to connect two intersecting rods.
4. How many classes of levers are there?
5. Type of load affects factor of safety.
6. Fulcrum can be located at one end of the lever.
7. For cast iron components, which of the following strength are considered to be the failure criterion?
8. Fracture toughness does not depend upon geometry of the part containing crack
9. All type of stresses vanishes after as soon as the applied load is removed.
10. If for a curved beam of trapezoidal cross section, radius of neutral axis is 89.1816mm and radius of centroidal axis is 100mm, then find the bending stress at inner fibre whose radius is 50mm. Area of cross section of beam is 7200mm² and the beam is loaded with 100kN of load.
11. Which of the following are important parts of knuckle joint?
12. 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.
13. Pitting occurs on _____ of the component.
14. If there are residual stresses in the material, than lower factor of safety is used.
15. If a hollow steel tube is heated from a temperature of 25’C to 250’C then fid the expansion of tube if area of the cross section is 300mm²,length of tube=200mm and coefficient of thermal expansion is 10.8 x 10⁻⁶ per ⁰C.
16. If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm². Find the minimum normal stress.
17. A curved beam has neutral axis is curved while loaded and straight when unloaded.
18. Leverage is the ratio of load arm to effort arm.
19. Buckling is elastic instability which leads to sudden large lateral deflection.
20. Cotter joint can be used to connect two rods for torque transmission purpose.
21. The critical value at which crack extension occurs is called
22. Mechanical advantage is the ratio of effort to load.
23. The region of safety in maximum shear stress theory contains which of the given shape
24. 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.
25. Residual stresses are always added in the load stresses and hence are always harmful.