22) For a given thickness t of plates in a single rivet butt joint, the thickness of single cover plate is calculated as

23) The type of screw thread form used for motion and power transmission is

24) The joint used to connect the rods of square or rectangular cross-sections, subjected to axial forces is called

25) Which of the following keys is used when frequent changes in the position of the key on the shaft?

26) The coupling which permits rotary, transverse and longitudinal misalignment is called _____ coupling.