11. In simple bending theory, one of the assumptions is that the plane sections before bending remain plane after bending. This assumption means that-
A. stress is uniform throughout the beam
B. stress is proportional to the distance from the neutral axis
C. strain is proportional to the distance from the neutral axis
D. strain is uniform throughout the beam
12. The volumetric strain is the ratio of the-
A. original thickness to the change in thickness
B. change in thickness to the original thickness
C. original volume to the change in volume
D. change in volume to the original volume
13. The deformation of a bar under its own weight is _____ the deformation if the same body is subjected to a direct load equal to the weight of the body-
A. half
B. double
C. equal
D. quadruple
14. Strain re-setters are used to-
A. measure volumetric strain
B. measure linear strain
C. relieve strain
D. measure shear strain
15. The energy stored in a body when strained within the elastic limit is called-
A. resilience
B. proof resilience
C. impact energy
D. strain energy