Previous Year Questions
43 questions — organised by subject with solutions and explanations.
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A watershed got transformed from rural to urban over a period of time. The effect of urbanization on storm runoff hydrograph from the watershed is to
The ordinates of a 2-h unit hydrograph at 1 hour intervals starting from time t = 0, are 0, 3, 8, 6, 3, 2 and 0 /s. Use trapezoidal rule for numerical integration, if required. A storm of 6.6 cm occur
The sludge from the aeration tank of the activated sludge process (ASP) has solids content (by weight) of 2%. This sludge is put in a sludge thickener, where sludge volume is reduced to half. Assume t
Anaerobically treated effluent has MPN of total coliform as /100 mL. After chlorination, the MPN value declines to /100 mL. The percent removal (%R) and log removal (logR) of total coliform MPN is
Consider the following unit processes commonly used in water treatment; rapid mixing (RM), flocculation (F), primary sedimentation (PS), secondary sedimentation (SS), chlorination (C) and rapid sand f
In an aquifer extending over 150 hectare, the water table was 20m below ground level. Over a period of time the water table dropped to 23m below the ground level. If the porosity of aquifer is 0.40 an
Consider four common air pollutants found in urban environments, NO, , Soot and . Among these with one is the secondary air pollutant?
Total suspended particulate matter (TSP) concentration in ambient air is to be measured using a high volume sampler. The filter used for this purpose had an initial dry weight of 9.787 g. The filter w
Chlorine gas (8 mg/L as ) was added to a drinking water sample. If the free chlorine residual and pH was measured to be 2mg/L (as ) and 7.5, respectively, what is the concentration of residual ions in
For a body completely submerged in a fluid, the centre of gravity (G) and centre of Buoyancy (O) are known. The body is considered to be in stable equilibrium if
For a given discharge, the critical flow depth in an open channel depends on
The flow in a horizontal, frictionless rectangular open channel is supercritical. A smooth hump is built on the channel floor. As the height of hump is increased, choked condition is attained. With fu
A single pipe of length 1500 m and diameter 60 cm connects two reservoirs having a difference of 20 m in their water levels. The pipe is to be replaced by two pipes of the same length and equal diamet
A spillway discharges flood flow at a rate of 9 /s per metre width. If the depth of flow on the horizontal apron at the toe of the spillway is 46 cm, the tail water depth needed to form a hydraulic ju
Curvature correction to a staff reading in a differential leveling survey is
The observations from a closed loop traverse around an obstacle are What is the value of the missing measurement (rounded off to the nearest 10 mm)?
The results for sieve analysis carried out for three types of sand, P, Q and R, are given in the figure. If the fineness modulus values of the three sands are given as FMP, FMQ and FMR, it can be stat
A field vane shear testing instrument (shown in figure) was inserted completely into a deposit of soft, saturated silty clay with the vane rod vertical such that the top of the blades were 500 mm belo
A soil is composed of solid spherical grains of identical specific gravity and diameter between 0.075mm and 0.0075mm. If the terminal velocity of the largest particle falling through water without flo
Likelihood of general shear failure for an isolated footing in sand decreases with
Two geometrically identical isolated footings, X (linear elastic) and Y (rigid), are loaded identically (shown below). The soil reactions will
A singly under-reamed, 8 m long, RCC pile (shown in the figure) weighing 20 kN with 350 mm shaft diameter and 750 mm under-ream diameter is installed within stiff, saturated silty clay (undrained shea
Identical surcharges are placed at ground surface at sites X and Y , with soil conditions shown in figure and water table at ground surface. The silty clay layers at X and Y are identical. The thin sa
A sand layer found at sea floor under 20 m water depth is characterized with relative density=40%, maximum void ratio=1.0 , minimum void ratio=0.5, and specific gravity of soil solids=2.67. Assume the
For a saturated sand deposit, the void ratio and the specific gravity of solids are 0.70 and 2.67, respectively. The critical (upward) hydraulic gradient for the deposit would be
For a sample of dry, cohesionless soil with friction angle, , the failure plane will be inclined to the major principal plane by an angle equal to
Consider two RCC beams, P and Q, each having the section 400 mm x 750 mm (effective depth, d = 750 mm) made with concrete having a . For the reinforcement provided and the grade of concrete used, it m
Consider a bar of diameter 'D' embedded in a large concrete block as shown in the adjoining figure, with a pull out force P being applied. Let and be the bond strength (between the bar and concrete) a
Consider a reinforcing bar embedded in concrete. In a marine environment this bar undergoes uniform corrosion, which leads to the deposition of corrosion products on its surface and an increase in the
The cross-section of a thermo-mechanically treated (TMT) reinforcing bar has
A 16 mm thick plate measuring 650 mm x 420 mm is used as a base plate for an ISHB 300 column subjected to a factored axial compressive load of 2000 kN. As per IS 456-2000, the minimum grade of concret
A rigid beam is hinged at one end and supported on linear elastic springs (both having a stiffness of 'k') at points '1' and '2', and an inclined load acts at '2', as shown If the load P equals 100 kN
For the cantilever bracket, PQRS, loaded as shown in the below figure ( PQ = RS = L, and, QR = 2L), which of the following statements is FALSE?
Consider a simply supported beam with a uniformly distributed load having a neutral axis (NA) as shown. For points P (on the neutral axis) and Q (at the bottom of the beam) the state of stress is best
For the fillet weld of size 's' shown in the figure the effective throat thickness is
The figure shows a schematic representation of a steel plate girder to be used as a simply supported beam with a concentrated load. For stiffeners, PQ (running along the beam axis) and RS (running bet
The value of W that results in the collapse of the beam shown in the adjoining figure and having a plastic moment capacity of is
A vehicle negotiates a transition curve with uniform speed v. If the radius of the horizontal curve and the allowable jerk are R and J, respectively, the minimum length of the transition curve is
If the jam density is given as and the free flow speed is given as , the maximum flow for a linear traffic speed-density model is given by which of the following options?
If v is the initial speed of a vehicle, g is the gravitational acceleration, G is the upward longitudinal slope of the road and is the coefficient of rolling friction during braking, the braking dista
In Marshall testing of bituminous mixes, as the bitumen content increases the flow value
The probability that k number of vehicles arrive (i.e. cross a predefined line) in time t is given as is the average vehicle arrival rate. What is the probability that the time headway is greater than
The cumulative arrival and departure curve of one cycle of an approach lane of a signalized intersection is shown in the figure. The cycle time is 50 s and the effective red time is 30 s and the effec