Aconsolidation test was performed on a sample of fine-grained soil sample taken from a depth such that the vertical effective stress at that depth is 154 kn/m2. the thickness of the layer is 8 m, and the preconsolidation stress of the fine-grained soil layer is 154 kn/m2. if the initial void ratio of the soil is 0.87 and the design load to be added at the surface will induce a change in stress of 28 at the depth the sample was taken, calculate the primary consolidation settlement expected due to that load. the compression index of the soil is 0.3, and the recompression index of the soil is 0.07.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan