Previous Year Questions
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The average rainfall for a 3 hour duration storm is 2.7 cm and the loss rate is 0.3 cm/hr. The flood hydrograph has a base flow of 20 /s and produces a peak flow of 210 /s. The peak of a 3-h unity hyd
The rainfall during three successive 2 hour periods are 0.5, 2.8 and 1.6 cm. The surface runoff resulting from this storm is 3.2 cm. The index value of this storm is
A standard multiple-tube fermentation test was conducted on a sample of water from a surface stream. The results of the analysis for the confirmed test are given below. Using the above MPN index table
An analysis for determination of solids in the return sludge of Activated Sludge Process was done as follows: 1.) A crucible was dried to a constant mass of 62.485 g. 2.) 75 mL of a well-mixed sample
The present population of a community is 28000 with an average water consumption of 4200 /d. The existing water treatment plant has a design capacity of 6000 /d. It is expected that the population wil
Chlorine gas used for disinfection combines with water to form hypochlorous acid (HOCl). The HOCl ionizes to form hypochlorite in a reversible reaction : , the equilibrium of which is government by pH
The following data are given for a channel-type grit chamber of length 7.5 m. 1. flow-through velocity = 0.3 m/s 2. the depth of waste water at peak flow in the channel = 0.9 m 3. specific gravity of
A portion of waste water sample was subjected to standard BOD test (5 days, 20 C), yielding a value of 180 mg/L. The reaction rate constant (to the base'e') at 20 C was taken as 0.18 per day. The reac
The design parameter for flocculation is given by a dimensionless number Gt, where G is the velocity gradient and t is the detention time. Values of Gt ranging from are commonly used, with t ranging f
Water samples (X and Y) from two different source were brought ot the laboratory for the measurement of dissolved oxygen (DO) using modified Winkler method. Samples were transferred to 300 ml BOD bott
The organism, which exhibits very nearly the characteristics of an ideal pathogenic indicator is
Most of the turbidity meters work on the scattering principle. The turbidity value so obtained is expressed in
Hardness of water is directly measured by titration with ethylene-di-amine-tetracetic acid (EDTA) using
An existing 300 mm diameter circular sewer is laid at a slope of 1:28 and carries a peak discharge of 1728 /d. Use the partial flow diagram shown in the given figure and assume Manning's n = 0.015 At
The velocity in m/s at a point in a two-dimensional flow is given as . The equation of the stream line passing through the point is
An aircraft is flying in level flight at a speed of 200 km/hr through air (density, , and viscosity ). The lift coefficient at this speed is 0.4 and the drag coefficient is 0.0065. The mass of the air
The x component of velocity in a two dimensional incompressible flow is given by u=1.5x. At the point (x,y) = (1,0), the y component of velocity v=0. The equation for the y component of velocity is
The allowable Net Positive Sustion Head (NPSH) for a pump provided by the manufacturer for a flow of 0.05 /s is 3.3 m. The temperature of water is (vapour pressure head absolute = 0.44 m), atmosphere
A velocity field is given as , where x and y are in metres. The acceleration of a fluid particle at (x,y)=(1,1) in the x direction is
In the inclined manometer shown in the figure below, the reservoir is large. Its surface may be assumed to remain at a fixed elevation. A is connected to a gas pipeline and the deflection noted on the
For a pipe of radius, r, flowing half full under the action of gravity, the hydraulic depth is
A frictionless fluid of density r flow through a bent pipe as shown below. If A is the cross sectional area and V is the velocity of flow, the forces exerted on segment 1-2 of the pipe in the x and y
The height of a hydraulic jump in the stilling pool of 1:25 scale model was observed to be 10 cm. The corresponding prototype height of the jump is
A fire protection system is supplied from a water tower with a bent pipe as shown in the figure. The pipe friction f is 0.03. Ignoring all minor losses, the maximum discharge, Q in the pipe is
A steep wide rectangular channel takes off from a reservoir having an elevation of 101.2 m. At the entrance, the bottom elevation of the channel is 100 m. If the slope of the channel is increased by 4
A wide channel is 1 m deep and has a velocity of flow, V, as 2.13 m/s. If a disturbance is caused, an elementary wave can travel upstream with a velocity of
The laminar flow takes place between closely spaced parallel plates as shown in figure below. The velocity profile is given by . The gap height, h, is 5 mm and the space is filled with oil (specific g
A steady flow occurs in an open channel with lateral inflow of per unit width as shown in the figure. The mass conservation equation is
A thin flat plate in size settles in a large tank of water with a terminal velocity of 0.12 m/s. The coefficients of drag for a laminar boundary layer and for a turbulent boundary layer, where is the
The figure given below represents the contact pressure distribution underneath a
Two circular footings of diameters and are resting on the surface of the same purely cohesive soil. The ratio of their gross ultimate bearing capacities is
The undrained cohesion of a remoulded clay soil is 10 kN/ . If the sensitivity of the clay is 20, the corresponding remoulded compressive strength is
Using analysis and assuming planar failure as shown, the minimum factor of safety against shear failure of a vertical cut of height 4 m in a pure clay having and is
The figure below shows two flow lines for seepage across an interface between two soil media of different coefficients of permeability. If entrance angle , the exit angle will be
A 6 m thick clay layer undergoes 90% consolidation four times faster under two-way drainage as compared to one-way drainage. In an identical clay layer of 15 m thickness, two-way drainage will be fast
A group of 16 piles of 10 m length and 0.5 m diameter is installed in a 10 m thick stiff clay layer underlain by rock. The pile-soil adhesion factor is 0.4; average shear strength of soil on the sides
An infinite soil slope with an inclination of is subjected to seepage parallel to its surface. The soil has . Using the concept of mobilized cohesion and friction, at a factor of safety of 1.5 with re
The ratio of saturated unit weight to dry unit weight of soil is 1.25. If the specific gravity of solids ( ) is 2.65, the void ratio of the soil is
A 10 m thick clay layer is underlain by a sand layer of 20 m depth (see figure below). The water table is 5 m below the surface of clay layer. The soil above the water table is capillary saturated. Th
In the context of collecting undisturbed soil samples of high quality using a spoon sampler, following statements are made : I. Area ratio should be less than 10% II. Clearance ratio should be less th
An unsupported excavation is made to the maximum possible depth in a clay soil having , , . The active earth pressure, according to Rankine's theory, at the base level of the excavation is
In an undrained triaxial test on a saturated clay, the Poisson's ratio is
A unit volume of a mass of saturated soil is subjected to horizontal seepage. The saturated unit weight is 22 kN/ and the hydraulic gradient is 0.3. The resultant body force on the soil mass is
A retaining wall of height 8 m retains dry sand. In the initial state, the soil is loose and has a void ratio of 0.5, . Subsequently, the backfill is compacted to a state where void ratio is 0.4, . Th
A sprinkler irrigation system is suitable when
A canal irrigates a portion of a culturable command area of grow sugarcane and wheat. The average discharges required to grow sugarcane and wheat are, respectively, 0.36 and 0.27 cumecs. The time fact
For avoiding the limit state of collapse, the safety of RC structures is checked for appropriate combinations of Dead Load (DL), Imposed Load or Live Load (IL), Wind Load (WL) and Earthquake Load (EL)
An RC square footing of side length 2 m and uniform effective depth 200 mm is provided for a column. The line of action of the vertical compressive load passes through the centroid of the footing as w
At the limit state of collapse, an RC beam is subjected to flexural moment 200 kN-m, shear force 20 kN and torque 9 kN-m. The beam is 300 mm wide and has a gross depth of 425 mm, with an effective cov
An RC short column with square cross-section is made of M20 grade concrete and has 4 numbers, 20 mm diameter longitudinal bars of Fe-415 steel. It is under the action of a concentric axial compressive
A simply supported prestressed concreted beam is 6 m long and 300 mm wide. Its gross depth is 600 mm. It is prestressed by horizontal cable tendons at a uniform eccentricity of 100 mm. The prestressin
In the limit state design method of concrete structures, the recommended partial material safety factor ( ) for steel according to IS:456-2000 is
A homogeneous, simply supported prismatic beam of width B, depth D and span L is subjected to a concentrated load of magnitude P. The load can be placed anywhere along the span of the beam. The maximu
For linear elastic systems, the type of displacement function for the strain energy is
A three-span continuous beam has an internal hinge at B. Section B is at the mid-span of AC. Section E is at the mid-span of CG. The 20 kN load is applied at section B whereas 10 kN loads are applied
For the linear elastic beam shown in the figure, the flexural rigidity, EI is 781250 kN . When w = 10 kN/m, the vertical reaction at A is 50 kN. The value of for w = 100 kN/m is
A circular solid shaft of span L = 5 m is fixed at one end and free at other end. A twisting moment T = 100 kN-m is applied at the free end. The torsional rigidity is 50000 kN- /rad. Following stateme
In a two dimensional stress analysis, the state of stress at a point is shown below. If = 120 MPa and = 70 MPa, then are respectively
In a plate girder, the web plate is connected to the flange plates by fillet welding. The size of the fillet welds is designed to safely resist
A strut in a steel truss is composed of two equal angle ISA of thickness 100 mm connected back-to-back to the same side of a gusset plate. The cross sectional area of each angle is 2921 m and moment o
A square steel slab base of area 1 is provided for a column made of two rolled channel sections. The column carries an axial compressive load of 2000 kN. The line of action of the load passes through
Rivet value is defined as
A propped cantilever of span L is carrying a vertical concentrated load acting at midspan. The plastic moment of the section is . The magnitude of the collapse load is
Two equal angles ISA of thickness 10 mm are placed back to back and connected to the either side of a gusset plate through a single row of 16 mm diameter rivets in double shear. The effective areas of
A moment M of magnitude 50 kN-m is transmitted to a column flange through a bracket by using four 20 mm diameter rivets as shown in the figure. The shear force induced in the rivet A is
For the plane frame with an overhang as shown below, assuming negligible axial deformation, the degree of static indeterminacy, d, and the degree of kinematic indeterminacy, k, are
For a linear elastic structural system, minimization of potential energy yields
The plane frame below is analyzed by neglecting axial deformations. Following statements are made with respect to the analysis : I. Column AB carries axial force only II. Vertical Deflection at the ce
The unit load method used in structural analysis is
For the plane truss shown in the figure, the number of zero force members for the given loading is
A three hinged parabolic arch ABC has a span of 20 m and a central rise of 4 m. The arch has hinges at the ends and at the centre. A train of two point loads of 20 kN and 10 kN, 5m apart, crosses this
The road geometrics in India are designed for the
The data given below pertain to the design of a flexible pavement : Initial traffic = 1213 cvpd Traffic growth rate = 8% per annum Design life = 12 years Vehicle damage factor = 2.5 Distribution facto
A Marshall specimen is prepared for bituminous concrete with a bitumen content of 5 percent by weight of total mix. The theoretical and the measured unit weight of mix are 2.442 and 2.345 , respective
For a road with camber of 3% and the design speed of 80 km/hr, the minimum radius of the curve, beyond which NO superelevation is needed, is
The co-efficient of friction in the longitudinal direction of a highway is estimated as 0.396. The braking distance for a new car moving at a speed of 65 km/hr is
Three new roads P, Q and R are planned in a district. The data for these roads are given in the table below. Based on the principle of maximum utility, the order of priority for these three roads shou
In the context of flexible pavement design, the ratio of contact pressure to tyre pressure is called the Rigidity Factor. This factor is less than unity when the tyre pressure is
The star and Grid pattern of road network was adopted in