UPSC Civil Engineering 2026

(a) A frictionless pulley A as shown in the figure is supported by two bars AB and AC which are hinged at B and C to a vertical wall. A flexible cable, hinged at D, goes over the…

(a) Using limit state method, design a reinforced concrete circular column (with lateral ties) of height 3·0 m. It is subjected to an unfactored axial load of 1150 kN (dead load +…

(a) A vertical member in a truss is subjected to the following member force (factored) : (i) Compressive force = 30 kN (dead and live load) (ii) Tensile force = 150 kN (dead and w…

(a) Three bodies of weights 200 N, 800 N and 400 N are connected with inextensible strings, passing over the frictionless pulleys as shown in the figure. Using virtual work method…

(a) A free jet of water with constant cross-section area of 0·01 m² is deflected by a hinged plate of length 2·0 m, supported by a spring with spring constant k = 500 N/m and unco…

(a) Assuming the law for the velocity distribution in the boundary layer as $\dfrac{v}{V} = 2\left(\dfrac{y}{\delta}\right) - \left(\dfrac{y}{\delta}\right)^2$, derive an expressi…

(a) The data with respect to a normally consolidated clay are as follows : Thickness of the clay layer = 3·0 m Initial void ratio = 0·75 Liquid limit = 50% Effective overburden pr…

(a) Consolidated drained tests on clay specimens were performed and the following results were obtained : Specimen No. | Confining pressure (kPa) | Axial load (N) | Axial deformat…

(a) Explain with a neat sketch the essential features of English bond in brick masonry construction. (10 marks) (b) State the conditions under which one would best recommend the f…

(a) A vertical curve is formed when a descending gradient of 0·5% meets another descending gradient of 3·0%. Find the length of the vertical curve to provide the required (i) stop…

(a) What do you understand by a Gantt or Bar chart with respect to construction project management ? Explain it with a neat sketch and discuss the limitations of Bar chart with su…

(a) What do you understand by the effective CBR value ? Discuss its significance. How is it calculated as per the latest IRC guidelines ? (10 marks) (b) (i) List the various appli…

(a) What is the difference between a flood hydrograph and a mass curve ? Using the following data of a river at a dam site, construct and plot a flood hydrograph and find the valu…

(a) The following information is available regarding the relationship between trap efficiency and capacity-inflow ratio for a reservoir : | Capacity-Inflow Ratio | Trap Efficiency…

(a) A sedimentation tank is treating 5 million litres of sewage per day containing 250 ppm of suspended solids. The tank removes 60 percent of the suspended solids. Calculate the…

(a) (i) Explain Lacey's silt factor. If the value of this factor is 1.0, what does it indicate ? The longitudinal slope of a canal running in an alluvial soil is 1/5000. Design th…