Civil Engineering GATE 2015 Set-2 Questions with Answer

Ques 40 Geotechnical Engineering

A 588 cm³ volume of moist sand weighs 1010 gm. Its dry weight is 918 gm and specific gravity of solids, G is 2.67. Assuming density of water as 1 gm/cm³, the void ratio is _______.

Ques 41 Geotechnical Engineering

A 4 m thick layer of normally consolidated clay has an average void ratio of 1.30. Its compression index is 0.6 and coefficient of consolidation is 1 m²/yr. If the increase in vertical pressure due to foundation load on the clay layer is equal to the existing effective overburden pressure, the change in the thickness of the clay layer is _______ mm.

Ques 42 Geotechnical Engineering

A pile of diameter 0.4 m is fully embedded in a clay stratum having 5 layers, each 5 m thick as shown in the figure below. Assume a constant unit weight of soil as 18 kN/m³ for all the layers. Using α-method (λ = 0.15 for 25 m embedment length) and neglecting the end bearing component, the ultimate pile capacity (in kN) is _______.

Ques 43 Geotechnical Engineering

Stress path equation for tri-axial test upon application of deviatoric stress is, q = 10√3 + 0.5 p. The respective values of cohesion, c (in kPa) and angle of internal friction, φ are:

Ques 44 Geotechnical Engineering

A 6 m high retaining wall having a smooth vertical back face retains a layered horizontal backfill. Top 3 m thick layer of the backfill is sand having an angle of internal friction, φ = 30° while the bottom layer is 3 m thick clay with cohesion, c = 20 kPa. Assume unit weight for both sand and clay as 18 kN/m³. The total active earth pressure per unit length of the wall (in kN/m) is:

Ques 45 Hydrology

The relationship between porosity (η), specific yield (S_y) and specific retention (S_r) of an unconfined aquifer is:

Ques 46 Hydrology

A groundwater sample was found to contain 500 mg/L total dissolved solids (TDS). TDS (in %) present in the sample is _______.

Ques 47 Hydrology

A field channel has cultivable commanded area of 2000 hectares. The intensities of irrigation for gram and wheat are 30% and 50% respectively. Gram has a kor period of 18 days, kor depth of 12 cm, while wheat has a kor period of 18 days and a kor depth of 15 cm. The discharge (in m³/s) required in the field channel to supply water to the commanded area during the kor period is _______.

Ques 48 Hydrology

The average surface area of a reservoir in the month of June is 20 km². In the same month, the average rate of inflow is 10 m³/s, outflow rate is 15 m³/s, monthly rainfall is 10 cm, monthly seepage loss is 1.8 cm and the storage change is 16 million m³. The evaporation (in cm) in that month is:

Ques 49 Structural Engineering

A horizontal beam ABC is loaded as shown in the figure below. The distance of the point of contraflexure from end A (in m) is _______.

Ques 50 Structural Engineering

For the plane stress situation shown in the figure, the maximum shear stress and the plane on which it acts are:

Ques 51 Structural Engineering

A guided support as shown in the figure below is represented by three springs (horizontal, vertical and rotational) with stiffness k_x, k_y and k_θ respectively. The limiting values of k_x, k_y and k_θ are:

Ques 52 Structural Engineering

A column of size 450 mm x 600 mm has unsupported length of 3.0 m and is braced against side sway in both directions. According to IS 456: 2000, the minimum eccentricities (in mm) with respect to major and minor principal axes are: