According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

A. 45 to 60 %

B. 63 to 70 %

C. 70 to 83 %

D. 80 to 90 %

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under…
  2. The power transmitted by belt drive depends upon
  3. Resistance to fatigue of a material is measured by
  4. The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are…
  5. Maximum principal stress theory is applicable for
  6. The toughness of a material _________ when it is heated
  7. The product of the diametral pitch and circular pitch is equal to
  8. A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved…
  9. When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
  10. Which of the following statement is correct?
  11. A transmission shaft includes
  12. Basic hole is one
  13. A column is known as a long column if the slenderness ratio is
  14. In the assembly of pulley, key and shaft
  15. The dedendum is the radial distance from the
  16. Split nut is a locking device in which
  17. If an application calls for stresses on screw threads in one direction only, then the following type…
  18. A key way lowers
  19. Which of the following coupling is used to connect two shafts which have both lateral and angular misalignment?
  20. Which is correct statement? Stress concentration in cyclic loading is
  21. The most important dimension in the design of a nut is
  22. When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and…
  23. Pick up wrong statement. Fatigue strength can be increased by
  24. Which process will increase the fatigue duration of parts?
  25. If the centre distance of the mating gears having involute teeth is varied within limits, the velocity…
  26. The draw of cotter should not be more than
  27. Belt slip may occur due to
  28. The stress in the threaded part of the bolt will be __________ as compared to the shank.
  29. The efficiency of a riveted joint is equal to
  30. A self locking screw has