21.The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is

22.Resilience of a material is considered when it is subjected to

23.When two plates are butt together and riveted with cover plates with two rows of rivets, the joi;it is known as

24.The weakest section of a diamond riveting is the section which passes through

25.In riveted boiler joints, all stresses, shearing, bearing and tensile are based on the