List of top Environmental Engineering Questions on Collection of solid wastes asked in GATE CE

The point where the road alignment changes from a tangent to a curve is known as ___________.
 

The bank of a canal has the profile shown in the figure. The material is a homogeneous clay with a bulk unit weight of 20 kN/m\(^3\), undrained cohesion of 30 kPa and is fully saturated (\( \phi = 0 \)). For the trial slip circle shown, the area ABCDEA is 150 m\(^2\) and the centroid is at P. A tension crack (DE) of 2.5 m deep was also observed. Assume unit weight of water is 9.81 kN/m\(^3\) and consider 1 m run of the bank for the analysis. 
Considering the canal is empty and the tension crack is completely filled with water, the factor of safety against slope failure of the bank is ......... (round off to two decimal places). 

The analyses results of a water sample are given below. The non-carbonate hardness of the water (in mg/L) as CaCO\(_3\) is ......... (in integer).
Ca\(^{2+}\) = 150 mg/L as CaCO\(_3\)
Mg\(^{2+}\) = 40 mg/L as CaCO\(_3\)
Fe\(^{2+}\) = 10 mg/L as CaCO\(_3\)
Na\(^+\) = 50 mg/L as CaCO\(_3\)
K\(^+\) = 10 mg/L as CaCO\(_3\)
CO\(_3^{2-}\) = 120 mg/L as CaCO\(_3\)
HCO\(_3^{-}\) = 30 mg/L as CaCO\(_3\)
Cl\(^{-}\) = 50 mg/L as CaCO\(_3\); Other anions were not analysed.
The bank of a canal has the profile shown in the figure. The material is a homogeneous clay with a bulk unit weight of 20 kN/m\(^3\), undrained cohesion of 30 kPa and is fully saturated (\( \phi = 0 \)). For the trial slip circle shown, the area ABCDEA is 150 m\(^2\) and the centroid is at P. A tension crack (DE) of 2.5 m deep was also observed. Assume unit weight of water is 9.81 kN/m\(^3\) and consider 1 m run of the bank for the analysis.
Considering the canal is empty and the tension crack is completely filled with water, the factor of safety against slope failure of the bank is ......... (round off to two decimal places).
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The analyses results of a water sample are given below. The non-carbonate hardness of the water (in mg/L) as CaCO\(_3\) is ......... (in integer).
Ca\(^{2+}\) = 150 mg/L as CaCO\(_3\)
Mg\(^{2+}\) = 40 mg/L as CaCO\(_3\)
Fe\(^{2+}\) = 10 mg/L as CaCO\(_3\)
Na\(^+\) = 50 mg/L as CaCO\(_3\)
K\(^+\) = 10 mg/L as CaCO\(_3\)
CO\(_3^{2-}\) = 120 mg/L as CaCO\(_3\)
HCO\(_3^{-}\) = 30 mg/L as CaCO\(_3\)
Cl\(^{-}\) = 50 mg/L as CaCO\(_3\); Other anions were not analysed.
To design an optimum municipal solid waste collection route, which of the following is/are NOT desired: