Previous Year Questions
65 questions — organised by subject with solutions and explanations.
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During a 3 hour storm event, it was observed that all abstractions other than infiltration are negligible. The rainfall was idealized as 3 one hour storms of intensity 10 mm/hr, 20 mm/hr and 10 mm/hr
For a catchment, the S-curve (or S-hydrograph) due to a rainfall of intensity 1 cm/hr is given by (t in hr and Q in ) What will be the ordinate of a 2-hour unit hydrograph for this catchment at t=3 ho
A water sample contains the following dissolved ions. = 56mg/L; =40 mg/L; =30mg/L =3 mg/L; =190mg/L; =165mg/L; Water pH is 7. Atomic weights: Ca:40; Mg:24; Al:27; H:1; C:12; O:16; Na:23; Cl:35.5 The n
The cumulative noise power distribution curve at a certain location is given below The value of is equal to
The composition of a certain MSW sample and specific weights of its various components are given below : Specific weight ( ) of the MSW sample is
A synthetic sample of water is prepared by adding 100 mg Kaolinite (a clay mineral), 200 mg glucose, 168 mg NaCl, 120 mg , and 111 mg to 1 litre of pure water. The concentrations of total solids (TS)
The mean indoor airborne Chloroform ( ) concentration in a room was determine to be 0.4 . Use the following data : T = 293 K, P = 1 atmosphere, R = /mol-K, Atomic weight : C=12, H=1, Cl=35.5. This con
To determine the of a waste water sample, 5, 10 and 50 mL aliquots of the waste water were dilute to 300 mL and incubated at 20 C in BOD bottles for 5 days. The results were as follows Based on the da
For steady flow to a fully penetrating well in a confined aquifer, the drawdowns at radial distances of and from the well have been measured as and respectively, for a pumping rate of Q. The transmiss
In a rapid sand filter, the time for reaching particle break through ( ) is defined as the time elapsed from start of filter run to the time at which the turbidity of the effluent from the filter is g
The thickness of the laminar boundary layer on a flat plate at a point A is 2 cm and at a point B, 1 m downstream of A, is 3 cm. What is the distance of A from the leading edge of the plate ?
Identify the FALSE statement from the following: The specific speed of the pump increases with
A channel with a mild slope is followed by a horizontal channel and then by a steep channel. What gradually varied flow profiles will occur?
A hydraulic jump occurs in a rectangular, horizontal, frictonless channel. What would be the pre-jump depth if the discharge per unit width is 2 and the energy loss is 1 m ?
A very wide rectangular channel is designed to carry a discharge of 5 per meter width. The design is based on the Manning's equation with the roughness coefficient obtained from the grain size using S
An upward flow of oil (mass density 800 , dynamic viscosity 0.8 kg/m-s) takes place under laminar conditions in an inclined pipe of 0.1 m diameter as shown in the figure. The pressures at sections 1 a
The velocity field for a flow is given by : + + and the density varies as . In order that the mass is conserved, the value of should be
The necessary and sufficient condition for a surface to be called as a free surface is
The flow of glycerin (kinematic viscosity ) in an open channel is to be modeled in a laboratory flume using water ( ) as the flowing fluid. If both gravity and viscosity are important, what should be
The observed magnetic bearing of a line OE was found to be 185 . It was later discovered that station O had a local attraction of +1.5 . The true bearing of the line OE, considering a magnetic declina
During a levelling work along a falling gradient using a Dumpy level and a Staff of 3 m length, following successive readings were taken : 1.785,2.935,0.360,1.320. What will be the correct order of bo
Consider the following figure, which is an extract from a contour map (scale =1:20,000) of an area. An alignment of a road at a ruling gradient of 4% is to be fixed from the point O and beyond. What s
In the figure given below, the length PQ (WCB : 30 ) and QR (WCB : 45 ) respectively up to three places of decimal are
A Bench Marck (BM) with Reduced Level (RL) = 155.305 m has been established at the floor of a room. It is required to find out the RL of the underside of root (R) of the room using Spirit Levelling. T
A sample of saturated cohensionless soil tested in a drained triaxial compression test showed an angle of internal friction of . The deviatoric stress at failure for the sample at a confining pressure
Figure given below shows a smooth vertical gravity retaining wall with cohesionless soil backfill having an angle of internal friction . In the graphical representation of Rankine's active earth press
To provide safety against piping failure, with a factor of safety of 5, what should be the maximum permissible exit gradient for soil with specific gravity of 2.5 and porosity of 0.35 ?
For the soil profile shown in Figure below, the minimum number of precast concrete piles of 300 mm diameter required of safely carry the load for a given factor of safety of 2.5 (assuming 100% efficie
In a standard proctor test, 1.8 kg of moist soil was filling the mould (volume = 94.4cc) after compaction. A soil sample weighing 23 g was taken from the mould and ovendried for 24 hours at a temperat
The average effective overburden pressure on 10 m thick homogeneous saturated clay layer is 150 kPa. Consolidation test on an undisturbed soil sample taken from the clay layer showed that the void rat
List-I below gives the possible types of failure for a finite soil slope and List-II gives the reasons for these different types of failure. Match the items in List-I with the items in List-II
Laboratory sieve analysis was carried out on a soil sample using a complete set of standard IS sieves. Out of 500g of soil used in the test, 200g was retained on sieve, 250g was retained on sieve and
The range of void ratio between which quick sand condition occurs in cohesionless granular soil deposits is
Which of the following statement is NOT TRUE in the context of capillary pressure in solids ?
If the characteristic strength of concrete is defined as the strength below which not more than 50% of the test results are expected to fall, the expression for in terms of mean strength and standard
Assuming concrete below the neutral axis to be cracked, the shear stress across the depth of a singly-reinforced rectangular beam section
In the design of beams for the limit state of collapse in flexure as per IS:456-2000, let the maximum strain in concrete be limited to 0.0025 (in place of 0.0035). For this situation, consider a recta
Consider the following statements : I. The width-to-thickness ratio limitations on the plate elements under compression in steel members are imposed by IS:800-1984 in order to avoid fabrication diffic
As per IS:456-2000, consider the following statements I. The modular ratio considered in the working stress method depends on the type of steel used. II. There is an upper limit on the nominal shear s
Mohr's circle for the state of stress defined by MPa is a circle with
A long shaft of diameter d is subjected to twisting moment T at its ends. The maximum normal stress acting at its cross-section is equal to
The buckling load for the column AB shown in figure, as approaches infinity, becomes , where is equal to
A thin-walled long cylindrical tank of inside radius r is subjected simultaneously to internal gas pressure p and axial compressive force F at its ends. In order to produce 'pure shear' state of stres
Vertical reaction developed at B in the frame below due to the applied load to 100 kN (with 150,000 cross-sectional area and moment of inertia for both members) is
If a beam of rectangular cross-section is subjected to a vertical shear force V , the shear force carried by the upper one-third of the cross-section is
Consider the beam AB shown in the figure below. Part AC of the beam is rigid while Part CB has the flexural rigidity EI . Identify the correct combination of deflection at end B and bending moment at
A simply supported beam AB has the bending moment diagram as shown in the following figure The beam is possibly under the action of following loads
A beam with the cross-section given below is subjected to a positive bending moment (causing compression at the top) of 16 kN-m acting around the horizontal axis. The tensile force acting on the hatch
Consider a propped cantilever beam ABC under two loads of magnitude P each as shown in the figure below. Flexural rigidity of the beam is EI. The rotation at B is
I-section of a beam is formed by gluing wooden planks as shown in the figure below. If this beam transmits a constant vertical shear force of 3000 N, the glue at any of the four joint will be subjecte
When the triangular section of a beam as shown below becomes a plastic hinge, the compressive force acting on the section (with denoting the yield stress) becomes
In the design of welded tension members, consider the following statements : I. The entire cross-sectional are of the connected leg is assumed to contribute to the effective area in case of angles. II
Consider the following statements : I. Effective length of a battened column in usually increased to account for the additional load on battens due to the lateral expansion of columns. II. As per IS:8
A vehicle moving at 60 kmph on an ascending gradient of a highway has to come to stop position to avoid collision with a stationary object. The ratio of lag to brake distance is 6:5. Considering total
For designing a 2-phase fixed type signal at an intersection having North-South and East-West road where only straight ahead traffic is permitted, the following data is available. Total time lost per
A subgrade soil sample was tested using standard CBR apparatus and the observations are given below. Assuming that the load-penetration curve is convex throughout, the CBR value(%) of the sample is
Using IRC:37-1984 "Guidelines for the Design of Flexible Pavements" and the following data, choose the total thickness of the pavement. NO. of commercial vehicles when construction is completed = 2723
At an horizontal curve portion of a 4 lane undivided carriageway, a transition curve is to be introduced to attain required superelevation. The design speed is 60 kmph and radius of the curve is 245 m
Name the traffic survey data which is plotted by means of "Desire lines".
If aggregate size of 50-40 is to be tested for finding out the portion of elongated aggregates using length gauge, the slot length of the gauge should be
On an urban road, the free mean speed was measured as 70 kmph and the average spacing between the vehicles under jam condition as 7.0 m. The speed-flow-density equation is given by : and q=Uk Where, U
In case of governing equation for calculating wheel load stresses using Westergaard's approach, the following statements are made : I. Load stresses are inversely proportional to wheel load. II. Modul