1.Discuss the characteristics of waste that are favorable for biological treatment, thermal processing, recycling, and landfilling.
2.A 1.5 meter deep vertical wall trench is to be cut in a soil whose unit weight is 17.36 kN/cubic meters, angle of internal friction is 25 degrees, and cohesion is 20.6 kN/square meters. Determine the factor of safety of this trench by the Culmann Method.
3.Design a concrete column of 14 ft high to support a dead load of 80 kips and a live load of 200 kips? f'c= 6,000 psi fy= 60,000 psi