The unconfined compressive strength of a 'stiff clay' falls in the range
A borrow pit soil has a dry density ofkN/m3. How many cubic meters of this soil will be required to construct an embankment ofm3 volume with a dry density ofkN/m3.
What is the equivalent single wheel load of a dual wheel assembly carryingN each for pavement thickness ofcm ? Centre to centre spacing of tyres iscm and the distance between the walls of tyres iscm
A saturated clay stratum draining both at the top and bottom undergoespercent consolidation inyears under an applied load. If an additional drainage layer were present at the middle of the clay stratum,percent consolidation would occur in
The function of ballast in railaway tracks is to
Coulomb's theory of earth pressure is based on :
The ultimate bearing capacity of a soil iskN/m2. The depth of foundation is 1 m and unit weight of soil iskN/m3. Choosing a factor of safety of 2.the net safe bearing cacpacity is
A prestressed concrete rectangular beam of sizemm xmm is prestressed with an initial prestressing force ofkN at an eccentricity ofmm at midspan. Stress at top of the beam due to prestress alone, in N/mm2 is
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 in not travelling upstream. This is because the flow in the canal is
Water flows at a rate ofm3/s in a rectangular channel 3 m wide. The critical depth of flow is
A soil formation through which only seepage is possible, being partly permeable and capable of giving insignificant yield, is classified as
For a fixed beam with span L, having plastic moment capacity of Mp, the ultimate central concentrated load will be
One of the following statements is true with regards to bodies that float or are submerged in liquids :
In the plate bearing test, if the load applied is in the form of an inflated type of wheel, then this mechanism corresponds to :
A circular sewer 2 m diameter has to carry a discharge of 2 m3/s when flowing nearly full. What is the minmum required slope to initiate the flow ? (Assume Manning's n = 0.015)
Coagulation-flocculation with alum is performed :
The return period for the annual maximum flood of a given magnitude is 8 years. The probability that this flood magnitude will be exceeded once during the next 5 years is
The group index of a soil subgrade isThe subgrade soil is rated as
Transition curves are provided on the approach to horizontal curves in order to :
Water table drops by 3 m in an irrigable land ofhectare. If porosity and specific retention are 0.and 0.respectively, the change in storage in hectare-meter is :
For a 'best' symmetrical trapezoidal section of an open channel with a given area of section and side slopes, one of the following statements holds true :
A test platecm xcm resting on a sand deposit settles bymm under a certain loading intensity. A footingcm xcm resting on the same sand deposit and loaded to the same load intensity settles by
The unit for coefficient of subgrade modulus is
The material that exhibits the same elastic properties in all the directions at a point, is said to be
In a BOD test usingdilution of the sample (ML of sample andmL of dilution water), dissolved oxygen values for the sample and dilution water blank bottles after five days incubation at 20°C were 3.and 8.mg/L. respectively. Dissolved oxygen originally present in the undiluted sample was 0.mg/L. The 5-day 20°C BOD of the sample is
Blue baby disease (methaemoglobinemia) in children is caused by the presence of excess
A foundation is considered as shallow if its depth is :
Pipingin soil occurs when
The flow of water (mass density =kg/m3 and kinematic viscosity = 10-6 m2/s) in a commercial pipe, having equivalent roughness ks as 0.mm, yields an average shear stress at the pipe boundary =N/m2. The value of ks/δ' (δ' being the thickness of laminar sub-layer) for this pipe is
Temporary hardness in water is caused by the presence of