Previous Year Questions
42 questions — organised by subject with solutions and explanations.
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The rainfall on five successive days in a catchment were measured as 3, 8, 12, 6, and 2 cms. If the total runoff at the outlet from the catchment was 15 cm, the value of the -index (in mm/hour) is
During a 6-hour storm, the rainfall intensity was 0.8 cm/hour on a catchment of area 8.6 k . The measured runoff volume during this period was 256000 . The total rainfall was lost due to infiltration,
A 6-hour Unit Hydrograph (UH) of a catchment is triangular in shape with a total time base of 36 hours and a peak discharge of 18 . The area of the catchment (in sq. km) is
A Trickling filter is designed to remove
The theoretical oxygen demand of a 0.001 mol/L glucose solution is
A wastewater sample has an initial BOD of 222 mg/L. The first order BOD decay coefficient is 0.4/day. The BOD consumed (in mg/L) in 5 days is
For a water treatment plant having a flow rate of 432 , what is the required plan area of a Type I setting tank to remove 90% of the particles having a settling velocity of 0.12 cm/sec is
In disinfection, which of the following forms of chlorine is most effective in killing the pathogenic bacteria?
In natural water, hardness is mainly caused by
In a domestic wastewater sample, COD and BOD were measured. Generally which of the following statement is true for their relative magnitude?
When there is an increase in the atmospheric pressure, the water level in a well penetrating in a confined aquifer
The force 'F' required at equilibrium on the semi-cylindrical gate shown below is
In a lined rectangular canal, the Froude number of incoming flow is 3. A hydraulic jump forms when it meets the pool of water. The depth of flow after the jump formation is 1.51 m. Froude number of fl
Velocity distribution in a boundary layer flow over a plate is given by where, ; y is the distance measured normal to the plate; is the boundary layer thickness; and is the maximum velocity at . If th
A pump can lift water at a discharge of 0.15 to a head of 25 m. The critical cavitation number ( ) for the pump is found to be 0.144. The pump is to be installed at a location where the barometric pre
The specific gravity and insitu void ratio of a soil deposit are 2.71 and 0.85 respectively. The value of the critical hydraulic gradient is
Data from a sieve analysis conducted on a given sample of soil showed that 67% of the particles passed through 75 micron IS sieve. The liquid limit and plastic limit of the finer fraction was found to
The void ratios at the densest, loosest and the natural states of a sand deposit are 0.2, 0.6 and 0.4, respectively. The relative density of the deposit is
In a triaxial test carried out on a cohesionless soil sample with a cell pressure of 20 kPa, the observed value of applied stress at the point of failure was 40 kPa. The angle of internal friction of
The time for a clay layer to achieve 85% consolidation is 10 years. If the layer was half as thick, 10 times more permeable and 4 times more compressible then the time that would be required to achiev
If the effective stress strength parameters of a soil are c'=10 kPa and , the shear strength on a plane within the saturated soil mass at a point where the total normal stress is 300 kPa and pore wate
The observed value of the standard penetration number (N) at 10 m depth of a silty sand deposit is 13. The unit weight of the soil is 16 . The N value after correcting for the presence of fines will b
An infinite slope is to be constructed in a soil. The effective stress strength parameters of the soil are c'=0 and . The saturated unit weight of the slope is 20 and the unit weight of water is 10 .
The following data were obtained from a liquid limit test conducted on a soil sample. The liquid limit of the soli is
Read the following two statements I. Maximum strain in concrete at the outermost compression fibre is taken to be 0.0035 in bending II. The maximum compressive strain in concrete in axial compression
As per the provisions of IS 456-2000, in the limit state method for design of beams, the limiting value of the depth of neutral axis in a reinforced concrete beam of effective depth 'd' is given as
As per the provisions of IS 456-2000, the (short term) modulus of elesticity of M25 grade concrete (in ) can be assumed to be
The shear modulus (G), modulus of elasticity (E) and the Poisson's ratio (v) of a material are related as,
For the loading given in the figure below, two statements (I and II) are made. I. Member AB Carries shear force and bending moment. II. Member BC carries axial load and shear force. Which of the follo
In the propped cantilever beam carrying a uniformly distributed load of w N/m, shown in the following figure, the reaction at the support B is
ISA 100x100x10 mm (Cross sectional area = 1908 m ) is welded along A and B (as shown in figure), such that the lengths of the weld along, A and B are l1 and l2, respectively. Which of the following is
An ISMB 500 is used as a beam in a multi-storey construction. From the viewpoint of structural design, it can be considered to be 'laterally restrained' when,
ISA 100x100x10 mm (Cross sectional area = 1908 ) serves as tensile member. This angle is welded to a gusset plate along A and B appropriately as shown. Assuming the yield strength of the steel to be 2
When designing steel structures, one must ensure that local buckling in webs does not take place. This check may not be very critical when using rolled steel sections because.
A steel beam (with a constant El , and span L) is fixed at both ends and carries a uniformly distributed load (w kN/m), which is gradually increased till the beam reaches the stage of plastic collapse
A car is moving at a speed of 72 km/hr on a road having 2% upward gradient. The driver applies brakes when he sees an obstruction. If his reaction time is 1.5 seconds, assuming that the co-efficient o
Dowel bars in concrete pavement are placed
Stopping sight distance and frictional co-efficients are
Bitumen is derived from
The average daily traffic on a stretch of road is 300 commercial vehicles per lane per day. Design traffic repetitions for 10 years when vehicle damage factor is 2.5 and traffic growth rate is 7%, is
In a concrete pavement (A) Temperature stress is tensile at bottom during day time (B) Load stress is compressive at bottom