16.The ratio of elongation in a prismatic bar due to its own weight (W) as compared to another similar bar carrying an additional weight (W) will be

17.The total strain energy stored in a body is termed as

18.In a prismatic member made of two materials so joined that they deform equal�ly under axial stress, the unit stresses in two materials are

19.A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m , then the hoop stress will be

20.A beam is loaded as cantilever. If the load at the end is increased, the failure will occur