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) value (up to two […]
Q. Rainfall depth over a watershed is monitored through six number of well distributed rain gauges. Gauged data are given below Rain Gauge Number 1 2 3 4 5 6 Rainfall Depth (mm) 470 465 435 525 480 510 Area of Thiessen Polygon (×104 m2) 95 100 98 80 85 92 The Thiessen mean value
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 wall, up to two
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 Ans: 416.0-420.0
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 confining pressure of 200 kPa and subjected to
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 is
At a construction site, a contractor plans to make an excavation as shown in the figure Read More »
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 Ans: 2.60-2.80
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
The dimensions of a symmetrical welded I-section are shown in the figure. Read More »
Q. An RCC beam of rectangular cross section has factored shear of 200 kN at its critical section. Its width b is 250 mm and effective depth d is 350 mm. Assume design shear strength 𝑟𝑐 of concrete as 0.62 N/mm2 and maximum allowable shear stress 𝑟𝑐,𝑚𝑎𝑥 in concrete as 2.8 N/mm2. If two legged
Q. An RCC short column (with lateral ties) of rectangular cross section of 250 mm × 300 mm is reinforced with four numbers of 16 mm diameter longitudinal bars. The grades of steel and concrete are Fe415 and M20, respectively. Neglect eccentricity effect. Considering limit state of collapse in compression (IS 456 : 2000), the
