31. Computational methods of stress analysis fall into two distinct categories - one of them is intregral, what is the other?
32. Which of the following cell is sometimes used to investigate the shear behaviour of discontinuities?
33. For a typical hard rock with E = 105 Mpa and Poisson's ratio $$\left( \upsilon \right)$$ = 0.25, the modulus of rigidity in GPa is
34. What do you mean by effective stress?
35. In freshly exposed roof area of developing working, which of the following support should be preferably used?
36. Which of the following may be called as quick setting support?
37. What will be safe cover i.e. the tolerance limit for extraction of coal pillars with caving where railway line is on the surface? T is the seam thickness in meter
38. A series of tri-axial compression tests conducted on sandstone samples reveal the following relationship between major and minor principal stresses σ1 = 50 + 30σ3 [stresses are in MPa)
The cohesion in MPa and angle of internal friction in degrees of sandstone respectively are
The cohesion in MPa and angle of internal friction in degrees of sandstone respectively are