Q. Given the following data: design life n = 15 years, lane distribution factor D = 0.75, annual rate of growth of commercial vehicles r = 6%, vehicle damage factor F = 4 and initial traffic in the year of completion of construction = 3000 Commercial Vehicles Per Day (CVPD). As per IRC:37-2012, ...
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Q. A waste activated sludge (WAS) is to be blended with green waste (GW). The carbon (C) and nitrogen (N) contents, per kg of WAS and GW, on dry basis are given in the table. ParameterWASGWCarbon (g)54360Nitrogen (g)106 The ratio of WAS to GW required (up to two decimal places) to achieve a ...
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Q. The ultimate BOD (𝐿0) of a wastewater sample is estimated as 87% of COD. The COD of this wastewater is 300 mg/L. Considering first order BOD reaction rate constant k (use natural log) = 0.23 per day and temperature coefficient θ = 1.047, the BOD value (in mg/L, up to one decimal place) after ...
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Q. A water sample analysis data is given below. IonConcentration, mg/LAtomic WeightCa2+6040Mg2+3024.31HCO3-40061 The carbonate hardness (expressed as mg/L of CaCO3, up to one decimal place) for the water sample is Ans: 272.0 - 274.0 Sol:
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Q. In a laboratory, a flow experiment is performed over a hydraulic structure. The measured values of discharge and velocity are 0.05 m3/s and 0.25 m/s, respectively. If the full scale structure (30 times bigger) is subjected to a discharge of 270 m3/s, then the time scale (model to full scale) ...
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Q. Rainfall depth over a watershed is monitored through six number of well distributed rain gauges. Gauged data are given below Rain Gauge Number123456Rainfall Depth (mm)470465435525480510Area of Thiessen Polygon (×104 m2)9510098808592 The Thiessen mean value (in mm, up to one decimal place) ...
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Q. A rigid smooth retaining wall of height 7 m with vertical backface retains saturated clay as backfill. The saturated unit weight and undrained cohesion of the backfill are 17.2 kN/m3 and 20 kPa, respectively. The difference in the active lateral forces on the wall (in kN per meter length of ...
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Q. The void ratio of a soil is 0.55 at an effective normal stress of 140 kPa. The compression index of the soil is 0.25. In order to reduce the void ratio to 0.4, an increase in the magnitude of effective normal stress (in kPa, up to one decimal place) should be ...
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Q. A conventional drained triaxial compression test was conducted on a normally consolidated clay sample under an effective confining pressure of 200 kPa. The deviator stress at failure was found to be 400 kPa. An identical specimen of the same clay sample is isotropically consolidated to a ...
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Q. At a construction site, a contractor plans to make an excavation as shown in the figure. The water level in the adjacent river is at an elevation of +20.0 m. Unit weight of water is 10 kN/m3. The factor of safety (up to two decimal places) against sand boiling for the proposed excavation ...
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Q. Consider the deformable pin-jointed truss with loading, geometry and section properties as shown in the figure. Given that E = 2×1011 N/m2, A = 10 mm2, L = 1 m and P = 1 kN. The horizontal displacement of Joint C (in mm, up to one decimal place) is ...
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Q. The dimensions of a symmetrical welded I-section are shown in the figure. The plastic section modulus about the weaker axis (in cm3, up to one decimal place) is_________ Ans: 88.0-92.0
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