Previous Year Questions
96 questions — organised by subject with solutions and explanations.
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An isolated 3-h rainfall event on a small catchment produces a hydrograph peak and point of inflection on the falling limb of the hydrograph at 7 hours and 8.5 hours respectively, after the start of t
In reservoirs with an uncontrolled spillway, the peak of the plotted outflow hydrograph
The Muskingum Model of routing a flood through a stream reach is expressed as , where , and are the routing coefficients for the concerned reach, and are the inflows to reach, and and are the outflows
A conventional flow duration curve is a plot between
A suspension of sand like particles in water with particles of diameter 0.10 mm and below is flowing into a settling tank at 0.10 /s. Assume g=9.81 m/ , specific gravity of particles=2.65, and kinemat
An effluent at a flow rate of 2670 /d from a sewage treatment plant is to be disinfected. The laboratory data of disinfection studies with a chlorine dosage of 15 mg/l yield the model where = number o
Some of the nontoxic metals normally found in natural water are
16 MLD of water is flowing through a 2.5 km long pipe of diameter 45 cm. The chlorine at the rate of 32 kg/d is applied at the entry of this pipe so that disinfected water is obtained at the exit. The
A surface water treatment plant operates round the clock with a flow rate of 35 /min. The water temperature is and jar testing indicated an alum dosage of 25 mg/l with flocculation at a Gt value of pr
The amount of generated (in kg) while completely oxidizing one kg of to the end productsis ____________
The dominating microorganisms in an activated sludge process reactor are
A waste water stream (flow=2 /s, ultimate BOD=90 mg/l) is joining a small river (flow=12 /s, ultimate BOD=5 mg/l). Both water streams get mixed up instantaneously. Cross sectional area of the river is
For a sample of water with the ionic composition shown in the figure below, the carbonate and non-carbonate hardness concentrations (in mg/l as ), respectivelyare:
The potable water is prepared from turbid surface water by adopting the following treatment sequence.
The two air pollution control devices that are usually used to remove very fine particles from the flue gas are
A particle moves along a curve whose parametric equations are: , and , where x, y and z show variations of the distance covered by the particle (in cm)with time t (in s). The magnitude of the accelera
A straight 100 m long raw water gravity main is to carry water from an intake structure to the jack well of a water treatment plant. The required flow through this water main is . Allowable velocity t
Group I lists a few devices while Group II provides information about their uses. Match the devices with their corresponding use.
The dimension for kinematic viscosity is
A venturimeter, having a diameter of 7.5 cm at the throat and 15 cm at the enlarged end, is installed in a horizontal pipeline of 15 cm diameter. The pipe carries an incompressible fluid at a steady r
An incompressible homogeneous fluid is flowing steadily in a variable diameter pipe having the large and small diameters as 15 cm and 5 cm, respectively. If the velocity at a section at the 15 cm diam
A rectangular channel of 2.5 m width is carrying a discharge of 4 /s. Considering that acceleration due to gravity as 9.81 m/ , the velocity of flow (in m/s) corresponding to the critical depth (at wh
Three rigid buckets, shown as in the figures (1), (2) and (3), are of identical heights and base areas. Further, assume that each of these buckets have negligible mass and are full of water. The weigh
A horizontal nozzle of 30 mm diameter discharges a steady jet of water into the atmosphere at a rate of 15 liters per second. The diameter of inlet to the nozzle is 100 mm. The jet Impinges normal to
A rectangular channel having a bed slope of 0.0001, width 3.0 m and Manning's coefficient 'n' 0.015, carries a discharge of 1.0 . Given that the normal depth of flow ranges between 0.76 m and 0.8 m. T
An incompressible fluid is flowing at a steady rate in a horizontal pipe. From a section, the pipe divides into two horizontal parallel pipes of diameters and (where ) that run for a distance of L eac
A horizontal jet of water with its cross-sectional area of 0.0028 hits a fixed vertical plate with a velocity of 5 m/s. After impact the jet splits symmetrically in a plane parallel to the plane of th
A plane flow has velocity components and w=0 along x, y and z directions respectively, where and are constants having the dimensions of time. The given flow is incompressible if
A venturimeter having a throat diameter of 0.1 m is used to estimate the flow rate of a horizontal pipe having a diameter of 0.2 m. For an observed pressure difference of 2 m of water head and coeffic
With reference to a standard Cartesian (x,y) plane, the parabolic velocity distribution profile of fully developed laminar flow in x-direction between two parallel, stationary and identical plates tha
Group I lists tool/instrument while Group II lists the method of surveying. Match the tool/instrument with the corresponding method of surveying.
A levelling is carried out to establish the Reduced Levels (RL) of point R with respect to the Bench Mark (BM) at P. The staff readings taken are given below. If RL of P is +100.000 m, then RL (in m)
The Reduced Levels (RLs) of the points P and Q are +49.600 m and +51.870 m respectively. Distance PQ is 20 m. The distance (in m from P) at which the +51.000 m contour cuts the line PQ is
A tachometer was placed at point P to estimate the horizontal distances PQ and PR. The corresponding stadia intercepts with the telescope kept horizontal, are 0.320 m and 0.210 m, respectively. The is
The chainage of the intersection point of two straights is 1585.60 m and the angle of intersection is . If the radius of a circular curve is 600.00 m, the tangent distance (in m) and length of the cur
The survey carried out to delineate natural features,such as hills, rivers, forests and manmade features, suchas towns, villages, buildings, roads, transmission lines and canals is classified as
As per Indian Standard Soil Classification System (IS: 1498-1970), an expression for A-line is
The flow net constructed for the dam is shown in the figure below. Taking the coefficient ofpermeability as , the quantity of flow (in ) under the dam per meter of dam is______________
The clay mineral primarily governing the swelling behavior of Black Cotton soil is
Water is flowing at a steady rate through a homogeneous and saturated horizontal soil strip of 10 m length. The strip is being subjected to a constant water head(H) of 5 m at the beginning and 1 m at
The degree of disturbance of the sample collected by the sampler is expressed by a term called the "area ratio". If the outer diameter and inner diameter of the sampler are and respectively, the area
The action of negative skin friction on the pile is to
The contact pressure for a rigid footing resting on clay at the center and the edges are respectively
A long slope is formed in a soil with shear strength parameters: and . A firm stratum lies below the slope and it is assumed that the water table may occasionally rise to the surface, with seepage tak
A circular raft foundation of 20 m diameter and 1.6m thick is provided for a tank that applies a bearing pressure of 110 kPa on sandy soil with Young's modulus, MPa and Poisson's ration, . The raft is
A certain soil has the following properties: =2.71, n=40% and w=20%. The degree of saturation of soil (rounded off to the nearest percent) is _____
Group I contains representative load-settlement curves for different modes of bearing capacity failures of sandy soil. Group II enlists the various failure characteristics. Match the load-settlement c
A single vertical friction pile of diameter 500 mm and length 20 m is subjected to a vertical compressive load. The pile is embedded in a homogeneous sandy stratum where: angle of internal friction is
The following data are given for the laboratory sample. ; ; ; e=0.9 If thickness of the clay specimen is 25 mm, the value of coefficient of volume compressibility is___________
Group I enlists in-situ field tests carried out for soil exploration, while Group II provides a list of parameters for sub-soil strength characterization. Math the type of tests with the characterizat
A given cohesionless soil has and . In the field, the soil is compacted to a mass density of 1800 at a water content of 8%. Take the mass density of water as 1000 and as 2.7. The relative density (in
An infinitely long slope is made up of a soil having the properties: cohesion (c)=20 kPa, and dry unit weight . The angle of inclination and critical height of the slope are and 5 m, respectively. To
For a saturated cohesive soil, a triaxial test yields the angle of internal friction ( ) as zero. The conducted test is
Group I contains representative stress-strain curves as shown in the figure, while Group II given the list of materials. Match the stress-strain curves with the corresponding materials.
The target means strength for concrete mix design obtained from the characteristic strength and standard deviation , as defined in IS:456-2000, is
For a beam of cross -section, width = 230 mm and effective depth = 500 mm, the number of rebars of 12 mm diameter required to satisfy minimum tension reinforcement requirement specified by IS:456-2000
The flexural tensile strength of M25 grade of concrete, in , as per IS:456-2000 is
The modulus of elasticity, where is the characteristic compressive strength of concrete, specified in IS:456-2000 is based on
A rectangular beam of width (b) 230 mm and effective depth (d) 450 mm is reinforced with four bars of 12 mm diameter. The grade of concrete is M20 and grade of steel is Fe500. Given that for M20 grade
The first moment of area about the axis of bending for a beam cross-section is
Match the information given in Group - I with those in Group - II.
In a reinforced concrete section, the stress at the extreme fibre in compression is 5.80 MPa. The depth of neutral axis in the section is 58 mm and the grade of concrete is M25. Assuming linear elasti
While designing, for a steel column of Fe250 grade, a base plate resting on a concrete pedestal of M20 grade, the bearing strength of concrete (in ) in limit state method of design as per IS:456-2000
The axial load (in kN) in the member PQ for the arrangement/assembly shown in the figure given below is__________
A box of weight 100 kN shown in the figure is to be lifted without swinging. If all forces are coplanar, the magnitude and direction ( ) of the force (F) with respect to x-axis should be
For the cantilever beam of span 3 m (shown below), a concentrated load of 20 kN applied at the free end causes a vertical displacement of 2 mm at a section located at a distance of 1 m from the fixed
The possible location of shear centre of the channel section, shown below, is
The tension (in kN) in a 10m long cable, shown in figure, neglecting its self-weight is
The values of axial stress ( ) in kN/ , bending moment (M) in kNm, and shear force (V) in kN acting at point P for the arrangement shown in the figure are respectively
The beam of an overall depth 250 mm (shown below) is used in a building subjected to two different thermal environments. The temperatures at the top and bottom surfaces of the beam are 36 and 72 respe
If the following equation establishes equilibrium in slightly bent position, the mid-span deflection of a member shown in the figure is: If a is amplitude constant for y, then
For the state of stresses (in MPa) shown in the figure below, the maximum shear stress (in MPa) is _____
The tension and shear force (both in kN) in each bolt of the joint, as shown below, respectively are
A steel section is subjected to a combination of shear and bending actions. The applied shear force is V and the shear capacity of the section is . For such a section, high shear force (as per IS:800-
A prismatic beam (as shown below) has plastic moment capacity of , then the collapse load P of the beam is
The ultimate collapse load (P) in terms of plastic moment by kinematic approach for a propped cantilever of length L with P acting at its mid-span as shown in the figure, would be
The static indeterminacy of the two-span continuous beam with an internal hinge,shown below,is_________
For the truss shown below, the member PQ is short by 3 mm. The magnitude of vertical displacement of joint R (in mm) is _______________
Considering the symmetry of a rigid frame as shown below, the magnitude of the bending moment (in kNm) at P (preferably using the moment distributing method) is
The degree of static indeterminacy of a rigid jointed frame PQR supported as shown in the figure is
Mathematical idealization of a crane has three bars with their vertices arranged as shown in the figure with a load of 80 kN hanging vertically. The coordinates of the vertices are given in parenthese
In a beam of length L, four possible influence line diagrams for shear force at a section located at a distance of from the left end support (marked as P, Q, R and S) are shown below. The correct infl
The following statements are related to temperature stresses developed in concrete pavement slabs with free edges (without any restraint): P. The temperature stresses will be zero during both day and
A student riding a bicycle on a 5 km one-way street takes 40 minutes to reach home. The student stopped for minutes during this ride. 60 vehicles overtook the student (assume the number of vehicles ov
A pre-timed four phase signal has critical lane flow rate for the first three phases as 200, 187 and 210 veh/hr with saturation flow rate of 1800 veh/hr/lane for all phases. The lost time is given as
In a Marshall sample, the bulk specific gravity of mix and aggregates are 2.324 and 2.546 respectively. The sample includes 5% of bitumen (by total weight of mix) of specific gravity 1.10. The theoret
An observer counts 240 veh/h at a specific highway location. Assume that the vehicle arrival at the location is Poisson distributed, the probability of having one vehicle arriving over a 30 seconds ti
An isolated three-phase traffic signal is designed by Webster's method. The critical flow ratios for three phases are 0.20, 0.30, and 0.25 respectively, and lost time per phase is 4 seconds. The optim
A traffic survey conducted on a road yields an average daily traffic count of 5000 vehicles. The axle load distribution on the same road is given in the following table: The design period of the road
The average spacing between vehicles in a traffic stream is 50 m, then the density (in veh/km) of the stream is_______
On a section of a highway the speed-density relationship is linear and is given by ; where v is in km/h and k is in veh/km. The capacity (in veh/h) of this section of the highway would be
The minimum value of 15 minute peak hour factor on a section of a road is
The perception-reaction time for a vehicle travelling at 90 km/h, given the coefficient of longitudinal friction of 0.35 and the stopping sight distance of 170 m (assume g = 9.81 ), is _____________ s
A road is being designed for a speed of 110 km/hr on a horizontal curve with a super elevation of 8%. If the coefficient of side friction is 0.10, the minimum radius of the curve (in m) required for s
The speed-density (u-k) relationship on a single lane road with unidirectional flow u= 70-0.7k, where u is in km/hr and k is in veh/km. The capacity of the road (in veh/hr) is________