Civil Engineering GATE 2016 Set-2 Questions with Answer

Ques 27 Geotechnical Engineering

The results of a consolidation test on an undisturbed soil, sampled at a depth of 10 m below the ground level are as follows:
Saturated unit weight 16 kN/m³
Pre-consolidation pressure 90 kPa
The water table was encountered at the ground level. Assuming the unit weight of water as 10 kN/m³ the over-consolidation ratio of the soil is

Ques 28 Geotechnical Engineering

The seepage occurring through an earthen dam is represented by a flownet comprising of 10 equipotential drops and 20 flow channels. The coefficient of permeability of the soil is 3 mm/min and the head loss is 5 m. The rate of seepage (expressed in cm³/s per m length of the dam) through the earthen dam is

Ques 29 Geotechnical Engineering

The soil profile at a site consists of a 5 m thick sand layer underlain by a c-ϕ soil as shown in figure. The water table is found 1 m below the ground level. The entire soil mass is retained by a concrete retaining wall and is in the active state. The back of the wall is smooth and vertical. The total active earth pressure (expressed in kN/m²) at point A as per Rankine's theory is

Ques 30 Geotechnical Engineering

OMC-SP and MDD-SP denote the optimum moisture content and maximum dry density obtained from standard Proctor compaction test, respectively. OMC-MP and MDD-MP denote the optimum moisture content and maximum dry density obtained from the modified Proctor compaction test, respectively. Which one of the following is correct?

Ques 31 Hydrology and Irrigation Engineering

The ordinates of a one-hour unit hydrograph at sixty minute interval are 0, 3, 12, 8, 6, 3 and 0 m³/s. A two-hour storm of 4 cm excess rainfall occurred in the basin from 10 AM. Considering constant base flow of 20 m³/s, the flow of the river (expressed in m³/s) at 1 PM is

Ques 32 Hydrology and Irrigation Engineering

A 3 m wide rectangular channel carries a flow of 6 m³/s. The depth of flow at a section P is 0.5 m. A flat-topped hump is to be placed at the downstream of the section P. Assume negligible energy loss between section P and hump, and consider g as 9.81 m/s². The maximum height of the hump (expressed in m) which will not change the depth of flow at section P is

Ques 33 Hydrology and Irrigation Engineering

A penstock of 1 m diameter and 5 km length is used to supply water from a reservoir to an impulse turbine. A nozzle of 15 cm diameter is fixed at the end of the penstock. The elevation difference between the turbine and water level in the reservoir is 500 m. Consider the head loss due to friction as 5% of the velocity head available at the jet. Assume unit weight of water = 10 kN/m and acceleration due to gravity (g) = 10 m/s². If the overall efficiency is 80%, power generated (expressed in kW and rounded to nearest integer) is

Ques 34 Hydrology and Irrigation Engineering

A tracer takes 100 days to travel from Well-1 to Well-2 which are 100 m apart. The elevation of water surface in Well-2 is 3 m below that in Well-1. Assuming porosity equal to 15%, the coefficient of permeability (expressed in m/day) is

Ques 35 Hydrology and Irrigation Engineering

Profile of a weir on permeable foundation is shown in figure I and an elementary profile of 'upstream pile only case' according to Khosla's theory is shown in figure II. The uplift pressure heads at key points Q, R and S are 3.14 m, 2.75 m and 0 m, respectively (refer figure II).
What is the uplift pressure head at point P downstream of the weir (junction of floor and pile as shown in the figure I)?

Ques 36 Hydrology and Irrigation Engineering

Water table of an aquifer drops by 100 cm over an area of 1000 km². The porosity and specific retention of the aquifer material are 25% and 5%, respectively. The amount of water (expressed in km³) drained out from the area is

Ques 37 Project Management

A construction project consists of twelve activities. The estimated duration (in days) required to complete each of the activities along with the corresponding network diagram is shown below.
Total floats (in days) for the activities 5-7 and 11-12 for the project are, respectively,

Ques 38 Project Management

The activity-on-arrow network of activities for a construction project is shown in the figure. The durations (expressed in days) of the activities are mentioned below the arrows. The critical duration for this construction project is

Ques 39 Solid Mechanics

An elastic isotropic body is in a hydrostatic state of stress as shown in the figure. For no change in the volume to occur, what should be its Poisson's ratio?