Previous Year Questions
89 questions — organised by subject with solutions and explanations.
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The compound which is largely responsible for initial setting and early strength gain of Ordinary Portland Cement is
The Optimistic Time (O), most likely Time (M) and Pessimistic Time (P) (in days) of the activities in the critical path are given below in the format O-M-P. The expected completion time(in days) of th
A construction Project consists of twelve activities.The estimated duration (in days) required to complete each of the activities along with the corresponding network diagram is shown below. Total flo
Bull's trench kiln is used in the manufacturing of
As per Indian standards for bricks, minimum acceptable compressive strength of any class of burnt clay bricks in dry state is
The activity-on-arrow network of activities for a construction project is shown in the figure. The durations (expressed in days) of the activities are mentioned below the arrows. The critical duration
The direct runoff hydrograph in response to 5 cm rainfall excess in a catchment is shown in the figure. The area of the catchment (expressed in hectares) is ___________.
The type of flood routing (Group I) and the equation(s) used for the purpose (Group II) are given below. The correct match is
The ordinates of a one-hour unit hydrograph at sixty minute interval are 0, 3, 12, 8, 6, 3 and 0 . A two-hour storm of 4 cm excess rainfall occurred in the basin from 10 AM. Considering constant base
Pre-cursors to photochemical oxidants are
It was decided to construct a fabric filter, using bags of 0.45 m diameter and 7.5 m long, for removing industrial stack gas containing particulates. The expected rate of airflow into the filter is 10
The hardness of a ground water sample was found to be 420 mg/L as . A softener containing ion exchange resins was installed to reduce the total hardness to 75 mg/L as before supplying to 4 households.
Effluent from an industry 'A' has a pH of 4.2. The effluent from another industry 'B' has double the hydroxyl ( ) ion concentration than the effluent from industry 'A'. pH of effluent from the industr
Water table of an aquifer drops by 100 cm over an area of 1000 . The porosity and specific retention of the aquifer material are 25% and 5%, respectively. The amount of water (expressed in ) drained o
A water supply board is responsible for treating 1500 of water. A settling column analysis indicates that an overflow rate of 20 m/day will produce satisfactory removal for a depth of 3.1 m. It is dec
The sound pressure (expressed in ) of the faintest sound that a normal healthy individual can hear is
An electrostatic precipitator (ESP) with 5600 of collector plate area is 96 percent efficient in treating 185 of flue gas from a 200 MW thermal power plant. It was found that in order to achieve 97 pe
The 2-day and 4-day BOD values of a sewage sample are 100 mg/L and 155 mg/L, respectively. The value of BOD rate constant (expressed in per day) is ___________
For a wastewater sample, the three-day biochemical oxygen demand at incubation temperature of , is estimated as 200 mg/L. Taking the value of the first order BOD reaction rate constant as , the five-d
Match the items in Group-I with those in Group-II and choose the right combination.
A sample of water has been analyzed for common ions and results are presented in the form of a bar diagram as shown. The non-carbonate hardness (expressed in mg/L as ) of the sample is
A noise meter located at a distance of 30 m from a point source recorded 74 dB . The reading at a distance of 60 m from the point source would be _________
A tracer takes 100 days to travel from Well-1 to Well-2 which are 100 m apart. The elevation of water surface in Well-2 is 3m below that in Well-1. Assuming porosity equal to 15%, the coefficient of p
Crown corrosion in a reinforced concrete sewer is caused by:
The atmospheric layer closest to the earth surface is
A 4 m wide rectangular channel, having bed slope of 0.001 carries a discharge of . Considering Manning's roughness coefficient = 0.012 and , the category of the channel slope is
A 3m wide rectangular channel carries a flow of . The depth of flow at a section P is 0.5 m. A flat-topped hump is to be placed at the downstream of the section P. Assume negligible energy loss betwee
A square plate is suspended vertically from one of its edges using a hinge support as shown in figure. A water jet of 20 mm diameter having a velocity of 10 m/s strikes the plate at its mid-point, at
Group I contains the types of fluids while Group II contains the shear stress - rate of shear relationship of different types of fluids, as shown in the figure. The Correct match between Group I and G
A penstock of 1 m diameter and 5 km length is used to supply water from a reservoir to an impulse turbine. A nozzle of 15 cm diameter is fixed at the end of the penstock. The elevation difference betw
A sector gate is provided on a spillway as shown in the figure. Assuming g = the resultant force per meter length (expressed in kN/m) on the gate will be _______ .
The pre-jump Froude Number for a particular flow in a horizontal rectangular channel is 10. The ratio of sequent depths (i.e., post-jump depth to pre-jump depth) is ___________
A hydraulically efficient trapezoidal channel section has a uniform flow depth of 2m. The bed width (expressed in m) of the channel is __________ .
A circular curve of radius R connects two straights with a deflection angle of . The tangent length is
Optimal flight planning for a photogrammetric survey should be carried out considering
The vertical angles subtended by the top of a tower T at two instrument stations set up at P and Q, are shown in the figure. The two stations are in line with the tower and spaced at a distance of 60m
The staff reading taken on a workshop floor using a level is 0.645 m. The inverted staff reading taken to the bottom of a beam is 2.960 m. The reduced level of the floor is 40.500 m. The reduced level
The reduced bearing of a 10 m long line is . The departure of the line is
The system that uses the Sun as a source of electromagnetic energy and records the naturally radiated and reflected energy from the object is called
The minimum number of satellites needed for a GPS to determine its position precisely is
A tall tower was photographed from an elevation of 700 m above the datum. The radial distances of the top and bottom of the tower from the principal points are 112.50 mm and 82.40 mm, respectively. If
A seepage flow condition is shown in the figure.The saturated unit weight of the soil . Using unit weight of water, , the effective vertical stress (expressed in ) on plane X-X is ________.
A fine grained soil is found to be plastic in the water content range of 26-48%. As per Indian Standard Classification System, the soil is classified as
A 4 m wide strip footing is founded at a depth of 1.5 m below the ground surface in a soil as shown in the figure. The water table is at a depth of 5.5 m below ground surface. The soil properties are:
Seepage is occurring through a porous media shown in the figure. The hydraulic conductivity values are in m/day. The seepage discharge through the porous media at section PQ is
A homogeneous gravity retaining wall supporting a cohesionless backfill is shown in the figure. The lateral active earth pressure at the bottom of the wall is 40 kPa. The minimum weight of the wall (e
The seepage occurring through an earthen dam is represented by a flow net comprising of 10 equipotential drops and 20 flow channels. The coefficient of permeability of the soil is 3 mm/min and the hea
The porosity (n) and the degree of saturation (S) of a soil sample are 0.7 and 40%, respectively. In a 100 volume of the soil, the volume (expressed in ) of air is ________ .
A strip footing is resting on the surface of a purely clayey soil deposit. If the width of the footing is doubled, the ultimate bearing capacity of the soil
In the consolidated undrained triaxial test on a saturated soil sample, the pore water pressure is zero
A vertical cut is to be made in a soil mass having cohesion c, angle of internal friction , and unit weight . Considering and as the coefficients of active and passive earth pressures, respectively, t
The results of a consolidation test on an undisturbed soil, sampled at a depth of 10 m below the ground level are as follows: Saturated unit weight : Pre-consolidation pressure : 90kPa The water table
OMC-SP and MDD-SP denote the optimum moisture content and maximum dry density obtained from standard Proctor compaction test, respectively. OMC-MP and MDD-MP denote the optimum moisture content and ma
Water flows from P to Q through two soil samples, Soil 1 and Soil 2, having cross sectional area of 80 as shown in the figure. Over a period of 15 minutes, 200 ml of water was observed to pass through
The soil profile at a site consists of a 5 m thick sand layer underlain by a soil as shown in figure. The water table is found 1 m below the ground level. The entire soil mass is retained by a concret
A drained triaxial compression test on a saturated clay yielded the effective shear strength parameters as Consolidated Undrained triaxial test on an identical sample of this clay at a cell pressure o
An undisturbed soil sample was taken from the middle of a clay layer (i.e., 1.5 m below GL), as shown in figure. The water table was at the top of clay layer. Laboratory test results are as follows: N
The relationship between the specific gravity of sand (G) and the hydraulic gradient (i) to initiate quick condition in the sand layer having porosity of 30% is
Profile of a weir on permeable foundation is shown in figure I and an elementary profile of 'upstream pile only case' according to Khosla's theory is shown in figure II. The uplift pressure heads at k
A concrete gravity dam section is shown in the figure. Assuming unit weight of water as and unit weight of concrete as , the uplift force per unit length of the dam (expressed in kN/m) at PQ is ______
For M25 concrete with creep coefficient of 1.5, the long-term static modulus of elasticity (expressed in MPa) as per the provisions of IS:456-2000 is __________.
A reinforced concrete (RC) beam with width of 250 mm and effective depth of 400 mm is reinforced with Fe415 steel. As per the provisions of IS 456-2000, the minimum and maximum amount of tensile reinf
As per IS 456-2000 for the design of reinforced concrete beam, the maximum allowable shear stress depends on the
A haunched (varying depth) reinforced concrete beam is simply supported at both ends, as shown in the figure. The beam is subjected to a uniformly distributed factored load of intensity 10 kN/m. The d
In shear design of an RC beam, other than the allowable shear strength of concrete there is also an additional check suggested in IS 456-2000 with respect to the maximum permissible shear stress . The
Two beams PQ (fixed at P and with a roller support at Q, as shown in Figure I, which allows vertical movement) and XZ (with a hinge at Y) are shown in the Figures I and II respectively. The spans of P
A 450 mm long plain concrete prism is subjected to the concentrated vertical loads as shown in the figure. Cross section of the prism is given as 150 mm x 150 mm. Considering linear stress distributio
An elastic isotropic body is in a hydrostatic state of stress as shown in the figure. For no change in the volume to occur, what should be its Poisson's ratio?
A rigid member ACB is shown in the figure. The member is supported at A and B by pinned and guided roller supports, respectively. A force P acts at C as shown. Let be the horizontal reactions at suppo
The portal frame shown in the figure is subjected to a uniformly distributed vertical load w (per unit length). The bending moment in the beam at the joint 'Q' is
For the stress state (in MPa) shown in the figure, the major principal stress is 10 MPa. The shear stress is
A 3 m long simply supported beam of uniform cross section is subjected to a uniformly distributed load of w=20kN/m in the central 1 m as shown in the figure If the flexural rigidity (EI) of the Beam i
The semi-compact section of a laterally unsupported steel beam has an elastic section modulus, plastic section modulus and design bending compressive stress of and 200MPa, respectively. The design fle
A fixed-end beam is subjected to a concentrated load (P) as shown in the figure. The beam has two different segments having different plastic moment capacities as shown. The minimum value of load (P)
Two plates are connected by fillet welds of size 10 mm and subjected to tension, as shown in the figure. The thickness of each plate is 12 mm. The yield stress and the ultimate tensile stress of steel
A propped cantilever of span L carries a vertical concentrated load at the mid-span. If the plastic moment capacity of the section is , the magnitude of the collapse load is
Two bolted plates under tension with alternative arrangement of bolt holes are shown in figures 1 and 2. The hole diameter, pitch, and gauge length are d, p and g, respectively. Which one of the follo
A plane truss with applied loads is shown in the figure.The members which do not carry any force are The members which do not carry any force are
Consider the plane truss with load P as shown in the figure. Let the horizontal and vertical reactions at the joint B be and , respectively and be the vertical reaction at the joint C. Which one of th
Consider the structural system shown in the figure under the action of weight W. All the joints are hinged. The properties of the members in terms of length (L), area (A) and the modulus of elasticity
The kinematic indeterminacy of the plane truss shown in the figure is
A motorist travelling at 100 km/h on a highway needs to take the next exit, which has a speed limit of 50 km/h. The section of the roadway before the ramp entry has a downgrade of 3% and coefficient o
The critical flow ratios for a three-phase signal are found to be 0.30, 0.25, and 0.25. The total time lost in the cycle is 10 s. Pedestrian crossings at this junction are not significant. The respect
In a one-lane one-way homogeneous traffic stream, the observed average headway is 3.0 sec. The flow (expressed in vehicles/hr) in this traffic stream is __________.
A two lane, one-way road with radius of 50 m is predominantly carrying lorries with wheelbase of 5 m. The speed of lorries is restricted to be between 60 kmph and 80 kmph. The mechanical widening and
While traveling along and against the traffic stream, a moving observer measured the relative flows as 50 vehicles/hr and 200 vehicles/hr, respectively. The average speeds of the moving observer while
During a forensic investigation of pavement failure, an engineer reconstructed the graphs P, Q, R and S, using partial and damaged old reports. Theoretically plausible correct graphs according to the
In the context of the IRC 58-2011 guidelines for rigid pavement design, consider the following pair of statements. I: Radius of relative stiffness is directly related to modulus of elasticity of concr
If the total number of commercial vehicles per day ranges from 3000 to 6000, the minimum percentage of commercial traffic to be surveyed for axle load is