UPSC Civil Engineering 2023

(a) An aluminium tensile specimen has a diameter of 30·50 mm and a gauge length 275 mm. If the force of 17·50 × 10⁴ N elongates the gauge length by 1·28 mm, determine the Poisson'…

(a) Draw the shearing force and bending moment diagrams for the beam loaded as shown in the figure below. (8 marks) (b) During the design of a beam, an ISMB 550 @ 1·037 kN/m is se…

(a) Design a floor slab to cover a room with internal dimensions of 4·5 m × 6·0 m. The slab is simply supported on all the sides on 230 mm thick masonry walls. The slab carries a…

(a) Determine the horizontal component of deflection of joint D of the truss loaded as shown in the figure. The cross-sectional area of each member is tabulated below. Take E = 20…

The flow rate of water over a weir is 3 m³/s. A 1 : 10 scale model of the weir is tested in a water channel. Answer the following : (i) What flow rate should be used for the model…

A flow of 9·0 m³/s occurs in a long rectangular channel of 3·0 m width with 1·5 m depth of water flow. There is a smooth constriction in the channel to 2·0 m width in the downstre…

(a) A 3·0 m high sandy fill material was placed loosely at a relative density of 50%. Laboratory studies indicated that the maximum and minimum void ratios of the fill material ar…

(a) At a site, fine sand exists to a depth of 10 m and below this lies a soft clay layer 7·0 m thick. Water table is 4·0 m below the ground surface. Saturated unit weight of sand…

(a) What are the approximate limits of chemical (oxide) composition in hydraulic cement ? Also state the function of oxides in brief. (10 marks) (b) (i) Explain with neat sketches…

(a) For a project consisting of several activities, the allotted time and the dependencies of the activities are presented below: | Activity | Duration (days) | Predecessor | | P…

(a) (i) Explain any two traffic surveys carried out to decide the geometric design features of a road. (5 marks) (ii) The relationship between speed and density for a given sectio…

(a) A machine was purchased for ₹4,50,000 on 1st January 2001 and erection and installation work costed ₹80,000. The same machine is replaced by a new one on 31st December 2020. I…

(a) A 6-hour unit hydrograph has the following ordinates : If φ index is 0·3 cm/hr and base flow is 25 m³/s, determine the ordinates of resulting hydrograph of flow in the catchme…

(a) (i) A 50 cm well in an unconfined aquifer of saturated thickness 45 m yields 600 lpm under a drawdown of 3 m at the pumping well. What will be the discharge under a drawdown o…

(a) Discuss the following operational difficulties encountered in the operation of Activated Sludge process : (i) Rising Sludge or Floating Sludge (ii) Sludge Bulking What kind of…

(a) (i) Design a trapezoidal concrete lined channel to carry a discharge of 300 m³/s at a slope of 1 in 4000. The side slope of the channel may be taken as 1·5 : 1. The value of n…