What will be the sensitivity of a soil specimen if its unconfined compressive strength in the undisturbed state is 280 units and in the remoulded state is 66 units?

If a 2% solution of a sewage sample is incubated for 5 days at 20 °C and the depletion of oxygen is found to be 5 ppm, the Biochemical Oxygen Demand (BOD) of the sewage is:

While aligning a hill road with a ruling gradient of 6%, a horizontal curve of radius 60 m is encountered. Find the compensated gradient at the curve as per IRC guidelines.