Civil Engineering GATE 2018 Set-1 Questions with Answer

Ques 53 Civil

Consider the deformable pin-jointed truss with loading, geometry and section properties as shown in the figure.

Given that E = 2 × 10¹¹ N/m², A = 10 mm², L = 1 m and P = 1 kN.
The horizontal displacement of Joint C (in mm, up to one decimal place) is _______.

2.60 to 2.80 is the correct answer.

Ques 54 Civil

At a construction site, a contractor plans to make an excavation as shown in the figure.

The water level in the adjacent river is at an elevation of +20.0 m. Unit weight of water is 10 kN/m³. The factor of safety (up to two decimal places) against sand boiling for the proposed excavation is _______.

1.00 to 1.03 is the correct answer.

Ques 55 Civil

A 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 _______.

124 to 126 is the correct answer.

Ques 56 Civil

The 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 _______.

416.0 to 420.0 is the correct answer.

Ques 57 Civil

A rigid smooth retaining wall of height 7 m with vertical backface retains saturated clay as backfill. The saturated unit weight and undrained cohesion of the backfill are 17.2 kN/m³ and 20 kPa, respectively. The difference in the active lateral forces on the wall (in kN per meter length of wall, up to two decimal places), before and after the occurrence of tension cracks is _______.

45 to 49 (or) -49 to -45 is the correct answer.

Ques 58 Civil

Rainfall depth over a watershed is monitored through six number of well distributed rain gauges. Gauged data are given below.

The Thiessen mean value (in mm, up to one decimal place) of the rainfall is _______.

478.5 to 479.5 is the correct answer.

Ques 59 Civil

The infiltration rate f in a basin under ponding condition is given by f = 30 + 10e^-2t, where, f is in mm/h and t is time in hour. Total depth of infiltration (in mm, up to one decimal place) during the last 20 minutes of a storm of 30 minutes duration is _______.

11.0 to 12.0 is the correct answer.

Ques 60 Civil

In a laboratory, a flow experiment is performed over a hydraulic structure. The measured values of discharge and velocity are 0.05 m³/s and 0.25 m/s, respectively. If the full scale structure (30 times bigger) is subjected to a discharge of 270 m³/s, then the time scale (model to full scale) value (up to two decimal places) is _______.

0.15 to 0.25 is the correct answer.

Ques 61 Civil

A water sample analysis data is given below.

The carbonate hardness (expressed as mg/L of CaCO₃, up to one decimal place) for the water sample is _______.

272.0 to 274.0 is the correct answer.

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Civil Engineering GATE 2018 Set-1 Questions with Answer