Previous Year Questions
63 questions — organised by subject with solutions and explanations.
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An isolated 4-hour storm occurred over a catchment as follows : The index for the catchment is 10 mm/h. The estimated runoff depth from the catchment due to the above storm is
Ordinates of a 1-hour unity hydrograph at 1 hour intervals, starting from time t = 0 are 0, 2, 6, 4, 2, 1 and 0 . Ordinate of a 3-hour unit hydrograph for the catchment at t = 3 hours is
A plain sedimentation tank with a length of 20 m, width of 10 m, and a depth of 3 m is used in a water treatment plant to treat 4 million litres of water per day (4 MLD). The average temperature of wa
The alkalinity and the hardness of a water sample are 250 mg/L and 350 mg/L as , respectively. The water has
The dispersion of pollutants in atmosphere is maximum when
A completely mixed activated sludge process is used to treat a wastewater flow of 1 million litres per day (1 MLD) having a of 200 mg/L. The biomass concentration in the aeration tank is 2000 mg/L and
50 g of and 25 g of are produced from the decomposition of municipal solid waste (MSW) with a formula weight of 120 g. What is the average per capita green house gas production in a city of 1 million
Two electrostatic precipitators (ESPs) are in series. The fractional efficiencies of the upstream and downstream ESPs for size are 80% and 65%, respectively. What is the overall efficiency of the syst
The presence of hardness in excess of permissible limit causes
Flow rate of a fluid (density = 1000 ) in a small diameter tube is 800 . The length and the diameter of the tube are 2 m and 0.5 mm, respectively. The pressure drop in 2 m length is equal to 2.0 MPa.
A 1:50 scale model of a spillway is to be tested in the laboratory. The discharge in the prototype is 1000 . The discharge to be maintained in the model test is
A triangle open channel has a vertex angle of and carries flow at a critical depth of 0.30 m. The discharge in the channel is
The flow rate in a wide rectangular open channel is 2.0 per metre width. The channel bed slope is 0.002. The Manning's roughness coefficient is 0.012. The slope of the channel is classified as
A rectangular open channel needs to be designed to carry a flow of 2.0 under uniform flow conditions. The Manning's roughness coefficient is 0.018. The channel should be such that the flow depth is eq
A horizontal water jet with a velocity of 10 m/s and cross sectional area of 10 strikes a flat plate held normal to the flow direction. The density of water is 1000 kg/ . The total force on the plate
There is a free overfall at the end of a long open channel. For a given flow rate, the critical depth is less than the normal depth. What gradually varied flow profile will occur in the channel for th
Two straight lines intersect at an angle of 60 . The radius of a curve joining the two straight lines is 600 m. The length of long chord and mid-ordinate in metres of the curve are
The following table gives data of consecutive coordinates in respect of a closed theodolite traverse PQRSP. The magnitude and direction of error of closure in whole circle bearing are.
The plan of a map was photo copied to a reduced size such that a line originally 100 mm, measures 90 mm. The original scale of the plan was 1:1000. The revised scale is
The following measurements were made during testing a levelling instrument. is close to P and is close to Q . If the reduced level of station P is 100.000 m, the reduced level of station Q is
The magnetic bearing of a line AB is S 45 E and the declination is 5 West. The true bearing of the line AB is
The bearing capacity of a rectangular footing of plan dimensions 1.5m x 3m resting on the surface of a sand deposit was estimated as 600 kN/ when the water table is far below the base of the footing.
The factor of safety of an infinite soil slope shown in the figure having the properties c=0, and is approximately equal to
A clay soil sample is tested in a triaxial apparatus in consolidated-drained conditions at a cell pressure of 100 kN/ . What will be the pore water pressure at a deviator stress of 40 kN/ ?
The water content of a saturated soil and the specific gravity of soil solids were found to be 30% and 2.70, respectively. Assuming the unit weight of water to be 10 kN/ , the saturated unit weight kN
Match the following groups
The vertical stress at some depth below the corner of a 2m x 3m rectangular footing due to a certain load intensity is 100 kN/ . What will be the vertical stress in kN/ below the centre of a 4m x 6m r
The ground conditions at a site are as shown in the figure. The water table at the site which was initially at a depth of 5 m below the ground level got permanently lowered to a depth of 15 m below th
The number of blows observed in a Standard Penetration Test (SPT) for different penetration depths are given as follows : The observed N value is
Sieve analysis on a dry soil sample of mass 1000 g showed that 980 g and 270 g of soil pass through 4.75 mm and 0.075 mm sieve, respectively. The liquid limit and plastic limits of the soil fraction p
Water is flowing through the permeability apparatus shown in the figure. The coefficient of permeability of the soil is k m/s and the porosity of the soil sample is 0.50. What are the discharge veloci
What is the ultimate capacity in kN of the pile group shown in the figure assuming the group to fail as a single block ?
The culturable command area for a distributed channel is 20,000 hectares. Wheat is grown in the entire area and the intensity of irrigation is 50%. The kor period for wheat is 30 days and the kor wate
The consumptive use of water for a crop during a particular stage of growth is 2.0 mm/day. The maximum depth of available water in the root zone is 60 mm. Irrigation is required when the amount of ava
As per the Lacey's method for design of alluvial channels, identify the TRUE statement from the following :
Consider the following statements : 1. The compressive strength of concrete decreases with increase in water-cement ratio of the concrete mix 2. Water is added to the concrete mix for hydration of cem
The percentage loss of prestress due to anchorage slip of 3 mm in a concrete beam of length 30 m which is post-tensioned by a tendon with an initial stress of 1200 and modulus of elasticity equal to i
A single reinforced rectangular concrete beam has a width of 150 mm and an effective depth of 330 mm. The characteristic compressive strength of concrete is 20 MPa and the characteristic tensile stren
Consider the following statements : 1. Modulus of elasticity of concrete increases with increase in compressive strength of concrete. 2. Brittleness of concrete increases with decrease in compressive
A concrete beam of rectangular cross-section of size 120 mm (width) and 200 mm (depth) is prestressed by a straight tendon to an effective force of 150 kN at an eccentricity of 20 mm (below the centro
A metal bar of length 100 mm is inserted between two rigid supports and its temperature is increased by . If the coefficient of thermal expansion is per and the Young's modulus is MPa, the stress in t
The shear stress at the neutral axis in a beam of triangular section with a base of 40 mm and height 20 mm, subjected to a shear force of 3 kN is
For an isotropic material, the relationship between the Young's modulus (E), shear modulus (G) and Poisson's ratio ( ) is given by
The maximum and minimum shear stresses in a hollow circular shaft of outer diameter 20 mm and thickness 2 mm, subjected to a torque of 92.7 Nm will be
An axially loaded bar is subjected to a normal stress of 173 MPa. The stress in the bar is
and are the Strain energies stored in a prismatic bar due toaxial tensile forces and , respectively. The strain energy U stored in the same bar due to combined action of and will be
A steel column, pinned at both end, has a buckling load of 200 kN. If the column is restrained against lateral movement at its mid-height, it buckling load will be
The plastic collapse load for the propped cantilever supporting two point loads as shown in fig. in terms of plastic moment capacity, is given by
A bracket connection is made with four bolts of 10 mm diameter and supports a load of 10 kN at an eccentricity of 100 mm. The maximum force to be resisted by any bolt will be
A steel flat of rectangular section of size mm is connected to a gusset plate by three bolt each having a shear capacity of 15 kN in holes having diameter 11.5 mm. If the allowable tensile stress in t
The stiffness coefficient indicates
A two span continuous beam having equal spans each of length L is subjected to a uniformly distributed load w per unit length. The beam has constant flexural rigidity. The bending moment at the middle
The right triangular truss is made of members having equal cross sectional area of 1550 and Young's modulus of MPa. The horizontal deflection of the joint Q is
The influence line diagram (ILD) shown is for the member
The consistency and flow resistance of bitumen can be determined from which of the following ?
The extra widening required for a two-lane National Highway at a horizontal curve of 300 m radius, considering a wheel base of 8 m and a design speed of 100 kmph is
The design speed on a road is 60 kmph. Assuming the driver reaction time of 2.5 seconds and coefficient of friction of pavement surface as 0.35, the required stopping distance for two-way traffic on a
The following data pertains of the number of commercial vehicles per day for the design of a flexible pavement for a national highway as per IRC:37-1984 : Assuming a traffic growth factor of 7.5% per
If a two-lane National Highway and a two-lane State Highway intersect at right angles, the number of potential conflict point at the intersection, assuming that both the roads are two-way is
In signal design as per Indian Roads Congress specifications, if the sum of the ratios of normal flows to saturation flow of two directional traffic is 0.50 and the total lost time per cycle is 10 sec
Match the following tests on aggregate and its properties.
While designing a hill road with a ruling gradient of 6%, if a sharp horizontal curve of 50 m radius is encountered, the compensated gradient at the curve as per the Indian Roads Congress specificatio
The width of the expansion join is 20 mm in a cement concrete pavement. The paying temperature is and the maximum slab temperature in summer is . The coefficient of the thermal expansion of concrete i