5.
A dry rock sample of diameter 50 mm and length 100 mm weighs 300 g. After saturating in brine solution of specific gravity 1.05, its weight increased to 330g. The porosity of the rock sample in percentage is

6.
A core of 10 cm height and 5.4 cm diameter is subjected to diametrical point loading. The ram of the hydraulic jack has a cross sectional area of 12.5 cm2 and the dial gauge reading is 3 MPa. What is the point load strength?

10.
Which of the following diagram can represent one aspect of bi-axial stress acting on a point with respect to a set of reference axes?