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In a soil specimen, the total stress, effective stress, hydraulic gradient and critical hydraulic gradient are , ', i and ic, respectively. For initiation of quicksand condition, which one of the following statements is TRUE?0 AnswerA soil has a void ratio of 0.75 and a specific gravity of 2.66. The value of critical hydraulic gradient at which quick sand condition will occur is. GATE- Agricultural Engineering- 20131 AnswerA coarse sand aquifer has porosity 20% and hydraulic conductivity 3.5x10^-3 m/s. If the hydraulic gradient is 0.00423 (m/m), then the average linear velocity of the groundwater in mm/s, (rounded off to three decimal places) is __________.0 AnswerFor the following statements: P – The lateral stress in the soil while being tested in an oedometer is always at-rest. Q – For a perfectly rigid strip footing at deeper depths in a sand deposit, the vertical normal contact stress at the footing edge is greater than that at its centre. R – The corrections for overburden pressure and dilatancy are not applied to measured SPT-N values in case of clay deposits.0 AnswerThe depths from the soil surface to subsurface tile drains, impermeable soil layer and the highest water table are measured as 2.8 m, 5.0 m and 0.8 m, respectively. The effective hydraulic head for drainage in meter is (GATE-Agricultural-Engineering-2018)0 AnswerDuring a high cycle fatigue test, a metallic specimen is subjected to cyclic loading with a mean stress of +140 MPa, and a minimum stress of −70 MPa. The R-ratio (minimum stress to maximum stress) for this cyclic loading is_______ (round off to one decimal place)0 AnswerIn stress strain curve of mild steel Ultimate Tensile Stress is1 AnswerConsider the stress-strain curve for an ideal elastic-plastic strain hardening metal as shown in the figure. The metal was loaded in uniaxial tension starting from O. Upon loading, the stress-strain curve passes through initial yield point at P, and then strain hardens to point Q, where the loading was stopped. From point Q, the specimen was unloaded to point R, where the stress is zero. If the same specimen is reloaded in tension from point R, the value of stress at which the material yields again is _________ MPa.0 AnswerT he void ratio of a soil is 0.55 at an effective normal stress of 140 kPa. The compression index of the soil is 0.25. In order to reduce the void ratio to 0.4, an increase in the magnitude of effective normal stress (in kPa, up to one decimal place) should be ______ (GATE-CIVIL-Engg-2018)1 AnswerAt a critical point in a component, the state of stress is given as 100MPa xx , 220MPa yy , 80MPa xy yx and all other stress components are zero. The yield strength of the material is 468 MPa. The factor of safety on the basis of maximum shear stress theory is ______ (round off to one decimal place).0 AnswerHow do you trace a contour gradient of 1 in 50 on a map having contour interval 2.0 m. ( Dec11, J une - J uly11)1 AnswerTrue stress - true strain behavior of a metal is given by the flow curve equation o=1750e^0.37 , where o is in MPa. The true stress at necking (in MPa, rounded off to the nearest integer) is ___________________.0 AnswerConsider the singly reinforced beam shown in the figure below:At cross-section XX, which of the following statements is TRUE at the limit state? - gate civil 2017 1 AnswerIn the engineering stress-strain curve for mild steel, the Ultimate Tensile Strength (UTS) refers to1 AnswerThe heat flow through a unit area of the Earth’s surface is given by the product of: (-Gate geology and geophysics 2014)1 Answer(Gate 2018 Mechanical engineering) The state of stress at a point, for a body in plane stress, is shown in the figure below. If the minimum principal stress is 10 kPa, then the normal stress y (in kPa) is 0 AnswerSpecific discharge of 1 cm per day is observed in a porous medium where hydraulic head difference is 0.5 m and flow length is 20 m. Calculate the hydraulic conductivity (in m/day). GATE-Geology and Geophysics-Question-20121 AnswerA conventional drained triaxial compression test was conducted on a normally consolidated clay sample under an effective confining pressure of 200 kPa. The deviator stress at failure was found to be 400 kPa. An identical specimen of the same clay sample is isotropically consolidated to a confining pressure of 200 kPa and subjected to standard undrained triaxial compression test. If the deviator stress at failure is 150 kPa, the pore pressure developed (in kPa, up to one decimal place) is ______ (GATE-CIVIL-Engg-2018)1 AnswerTransmissivity of an aquifer is the product of ________.1 AnswerThe true stress (σ) - true strain ( ) diagram of a strain hardening material is shown in figure. First, there is loading up to point A, i.e., up to stress of 500 MPa and strain of 0.5. (Gate 2018 Mechanical engineering)0 Answer
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