Previous Year Questions
67 questions — organised by subject with solutions and explanations.
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Group I list estimation method of some of the water and wastewater quality parameter. Group-II list the indicators used in the estimation methods. Match the estimation method (Group I) with the corres
A water treatment plant is required to process 28800 of raw water (density=1000 kg/ , kinematic viscosity= ). The rapid mixing tank imparts a velocity gradient of to blend 35 mg/l of alum with the flo
Two biodegradable components of municipal solid waste are
A volume of of groundwater was pumped form an unconfined aquifer uniformly from an area of 5 . The pumping lowered the water table form initial level of 102 m to 99 m. The specific yield of the aquife
Match Group-I (Terminology) with Group-II (Definition/ Brief Description) for wastewater treatment system
Two primary air pollutants are
A wastewater sample contains mmol/l of ions at 25 C. The pH of this sample is
The 5-day BOD of a wastewater sample is obtained as 190 mg/l (with k = 0.01 ). The ultimate oxygen demand (mg/l) of the sample will be
Determine the correctness or otherwise of the following Assertion [A] and the Reason [R] : Assertion :The crown of the outgoing larger diameter sewer is always matched with the crown of incoming small
The flow of water (mass density = 100 kg/ and kinematic viscosity = ) in a commercial pipe, having equivalent roughness as 0.12 mm, yields an average shear stress at the pipe boundary = 600 N/ . The v
A person standing on the bank of a canal drops a stone on the water surface. He notices that the disturbance on the water surface is not travelling upstream. This is because the flow in the canal is
An automobile with projected area 2.6 is running on a road with a speed of 120 km per hour. The mass density and the kinematic viscosity of air are 1.2 and , respectively. The drag coefficient is 0.30
A rectangular channel 6.0 m wide carries a discharge of 16.0 under uniform flow condition with normal depth of 1.60 m. Minning's n is 0.015. The channel width is to be contracted. The minimum width to
A river reach of 2.0 km long with maximum flood discharge of 10000 is to be physically modeled in the laboratory where maximum available discharge is 0.20 . For a geometrically similar model based on
A road is provided with a horizontal circular curve having deflection angle of 55 and centre line radius of 250 m. A transition curve is to be provided at each end of the circular curve of such a leng
The plan of a survey plotted to a scale of 10 m to 1 cm is reduced in such a way that a line originally 10 cm long now measures 9 cm. The area of the reduced plan is measured as 81 . The actual area (
The focal length of the object glass of a tacheometer is 200 mm, the distance between the vertical axis of the tacheometer and the optical centre of the object glass is 100 mm and the spacing between
The type of surveying in which the curvature of the earth is taken into account is called
The lengths and bearing of a closed traverse PQRSP are given below. The missing length and bearing, respectively of the line SP are
A light house of 120 m height is just visible above the horizon from a ship. The correct distance (m) between the ship and the light house considering combined correction for curvature and refraction,
A saturated clay stratum draining both at the top and bottom undergoes 50 percent consolidation in 16 year under an applied load. If an additional drainage layer were present at the middle of the clay
Compaction by vibratory roller is the best method of compaction in case of
A column is supported on a footing as shown in the figure below. The water table is at a depth of 10 m below the base of the footing. The safe load (kN) that the footing can carry with a factor of saf
When a retaining wall moves away from the backfill, the pressure exerted on the wall is termed as
The ground conditions at a site are shown in the figure below. The total stress, pore water pressure and effective stress (kN/ ) at the point P are, respectively
The liquid limit (LL), plastic limit (PL) and shrinkage limit (SL) of a cohesive soil satisfy the relation
Group Symbols assigned to silty sand and clayey sand are respectively
A footing exerts a uniform pressure of 150 kN/ on the soil. Assuming a load dispersion of 2 vertical to 1 horizontal, the average vertical stress (kN/ ) at 1.0 m below the footing is
The ground conditions at a site are shown in the figure below. The saturated unit weight of the sand (kN/ ) is
A direct shear test was conducted on a cohesion less soil (c=0) specimen under a normal stress of 200 kN/ . The specimen failed at a shear stress of 100 kN/ . The angle of internal friction of the soi
A pile of 0.50 m diameter and of length 10 m is embedded in a deposit of clay. The undrained strength parameters of the clay are cohesion = 60 kN/ and the angle of internal friction= 0. The skin frict
A test plate resting on a sand deposit settles by 10 mm under a certain intensity. A footing resting on the same sand deposit and loaded to the same load intensity settles by
An outlet irrigates an area of 20 ha. The discharge (l/s) required at this outlet to meet the evapotranspiration requirement of 20 mm occurring uniformly in 20 days neglecting other field losses is
Water emerges from an ogee spilway with velocity = 13.72 m/s and depth = 0.3 m at its toe. The tail water depth required to form a hydraulic jump at the toe is
A weir on a permeable foundation with downstream sheet pile is shown in the figure below. The exit gradient as per Khosla's method is
A stable channel is to be designed for a discharge of Q with silt factor f as per Lacey's method. The mean flow velocity (m/s) in the channel is obtained by
The base width of an elementary profile of a gravity dam of height H is b. The specific gravity of the material of the dam is G and uplift pressure coefficient is K. The correct relationship for no te
A reinforced concrete column contains longitudinal steel equal to 1 percent of net cross-section are of the column. Assume modular ratio as 10. The loads carried (using the elastic theory) by the long
In the design of a reinforced concrete beam the requirement for bond is not getting satisfied. The economical option to satisfy the requirement for bond is by
Un-factored maximum bending moment at a section of a reinforced concrete beam resulting form a frame analysis are 50, 80, 120 and 180 kNm under dead, live, wind and earthquake loads respectively. The
A reinforced concrete structure has to be constructed along a sea coast. The minimum grade of concrete to be used as per IS : 456-2000 is
A pre-tensioned concrete member of section 200mm x 250mm contains tendons of area 500 at centre of gravity of the section. The prestress in the tendons is 1000 . Assuming modular ratio as 10, the stre
A reinforced concrete beam of rectangular cross section of breadth 230 mm and effective depth 400 mm is subjected to a maximum factored shear force of 120 kN. The grades of concrete, main steel and st
The maximum shear stress in a solid shaft of circular cross-section having diameter d subjected to a subject to a torque T is . If the torque is increased by four times and the diameter of the shaft i
A rigid bar GH of length L is supported by a hinge and a spring of stiffness K as shown in the figure below. The buckling load, , for the bar will be
A mild steel specimen is under uniaxial tensile stress. Young's modulus and yield stress for mild steel are MPa and 250 MPa respectively. The maximum amount of strain energy per unit volume that can b
The stepped cantilever is subjected to moments, M as shown in the figure below. The vertical deflection at the free end (neglecting the self weight) is
A vertical rod PQ of length L is fixed at its top end P and has a flange fixed to the bottom end Q. A weight W is dropped vertically from a height h ( L) on to the flange. The axial stress in the rod
The maximum tensile stress at the section X-X shown in the figure below is
Beam GHI is supported by three pontoons as shown in the figure below. The horizontal cross-sectional area of each pontoon is , the flexural rigidity of the beam is 10000 and the unit weight of water i
Cross-section of a column consisting to two steel strips, each of thickness t and width b is shown in the figure below. The critical loads of the column with perfect bond and without bond between the
Rivets and bolts subjected to both shear stress ( ) and axial tensile stress ( ) shall be so proportioned that the stresses do not exceed the respective allowable stresses and and the value of does no
The shape of the cross-section, which has the largest shape factor, is
A continuous beam is loaded as shown in the figure below. Assuming a plastic moment capacity equal to , the minimum load at which the beam would collapse is
The members EJ and IJ of a steel truss shown in the figure below are subjected to a temperature rise to 30 C. The coefficient of thermal expansion of steel is 0.000012 per C per unit length. The displ
The span(s) to be loaded uniformly for maximum positive (upward) reaction at support P, as shown in the figure below, is (are)
The degree of static indeterminacy of the rigid frame having two internal hinges as shown in the figure below, is
A horizontal curvature curve with a centre line radius of 200 m is provided on a 2-lane, 2-way SH section. The width of the 2-lane road is 7.0 m. Design speed for this section is 80 km per hour. The b
The specific gravity of paving bitumen as per IS:73-1992 lies between
Design parameters for a signalized intersection are shown in the figure below. The green time calculated for major and minor roads are 34 and 18 s, respectively. The critical lane volume on the major
It is proposed to widen and strength and existing 2-lane NH section as a divided highway. The existing traffic in one direction is 2500 commercial vehicles (CV) per day. The construction will take 1 y
A linear relationship is observed between speed and density on a certain section of a highway. The free flow speed is observed to be 80 km per hour and the jam density is estimated as 100 vehicles per
The capacities of " One-way 1.5 m wide sidewalk (persons per hour)" and "One-way 2 lane urban road (PCU per hour, with no frontage access, no standing vehicles and very little cross traffic)" are resp
The shape of the STOP sign according to IRC:67-2001 is
A roundabout is provided with an average entry width of 8.4 m, width of weaving section as 14 m, and length of the weaving section between channelizing islands as 35 m. The crossing traffic and total
A combined value of flakiness and elongation index is to be determined for a sample of aggregates. The sequence in which the two tests are conducted is