145) The maximum water content at which a reduction in water content does not cause a decrease in volume of a soil mass, is known

146) A sample of saturated soil has 30% water content and the specific gravity of soil grains is 2.6. The dry density of the soil mass in g/cm3, is

147) The specific gravity of sands, is approximately

148) If the coefficients of volume change and compressibility of a soil sample are respectively 6.75 x 10-2 and 3 x 10-2, the void ratio of the soil sample, is

149) The minimum centre to centre distance of friction piles of 1 m diameter, is