Civil Engineering Gate Yearwise 

Civil Engineering GATE 2017 Set-1 Questions with Answer

Ques 53 Civil

A particle of mass 2 kg is travelling at a velocity of 1.5 m/s. A force f(t) = 3t2 (in N) is applied to it in the direction of motion for a duration of 2 seconds, where t denotes time in seconds. The velocity (in m/s, up to one decimal place) of the particle immediately after the removal of the force is _______.


5.5 is the correct answer.


Ques 54 Civil

The activity details of a project are given below:

The estimated minimum time (in days) for the completion of the project will be _______.


51 is the correct answer.


Ques 55 Civil

It is proposed to drive H-piles up to a depth of 7 m at a construction site. The average surface area of the H-pile is 3 m2 per meter length. The soil at the site is homogeneous sand, having an effective friction angle of 32°. The ground water table (GWT) is at a depth of 2 m below the ground surface. The unit weights of the soil above and below the GWT are 16 kN/m3 and 19 kN/m3, respectively. Assume the earth pressure coefficient, K = 1.0, and the angle of wall friction, δ = 23°. The total axial frictional resistance (in kN, up to one decimal place) mobilized on the pile against the driving is _______.


388.1 is the correct answer.


Ques 56 Civil

The infinite sand slope shown in the figure is on the verge of sliding failure. The ground water table coincides with the ground surface. Unit weight of water γw = 9.81 kN/m3.

The value of the effective angle of internal friction (in degrees, up to one decimal place) of the sand is _______.


34.3 is the correct answer.


Ques 57 Civil

A sluice gate used to control the flow in a horizontal channel of unit width is shown in the figure.

It is observed that the depth of flow is 1.0 m upstream of the gate, while the depth is 0.2 m downstream of the gate. Assuming a smooth flow transition across the sluice gate, i.e., without any energy loss, and the acceleration due to gravity as 10 m/s2, the discharge (in m3/s, up to two decimal places) passing under the sluice gate is _______.


0.81 is the correct answer.


Ques 58 Civil

Water flows through a 90° bend in a horizontal plane as depicted in the figure.

A pressure of 140 kPa is measured at Section 1-1. The inlet diameter marked at Section 1-1 is (27 / √π) cm while the nozzle diameter marked at Section 2-2 is (14 / √π) cm. Assume the following:
(i) Acceleration due to gravity = 10 m/s2
(ii) Weights of both the bent pipe segment as well as water are negligible.
(iii) Friction across the bend is negligible.
The magnitude of the force (in kN, up to two decimal places) that would be required to hold the pipe section is _______.


3.25 is the correct answer.


Ques 59 Civil

A consolidated undrained (CU) triaxial compression test is conducted on a normally consolidated clay at a confining pressure of 100 kPa. The deviator stress at failure is 80 kPa, and the pore-water pressure measured at failure is 50 kPa. The effective angle of internal friction (in degrees, up to one decimal place) of the soil is _______.


26.6 is the correct answer.


Ques 60 Civil

An effective rainfall of 2-hour duration produced a flood hydrograph peak of 200 m3/s. The flood hydrograph has a base flow of 20 m3/s. If the spatial average rainfall in the watershed for the duration of storm is 2 cm and the average loss rate is 0.4 cm/hour, the peak of 2-hour unit hydrograph (in m3/s-cm, up to one decimal place) is _______.


150 is the correct answer.


Ques 61 Civil

The equivalent sound power level (in dB) of the four sources with the noise levels of 60 dB, 69 dB, 70 dB and 79 dB is _______.


80 is the correct answer.


Ques 62 Civil

The spherical grit particles, having a radius of 0.01 mm and specific gravity of 3.0, need to be separated in a settling chamber. It is given that:

  • g = 9.81 m/s2
  • density of the liquid in the settling chamber = 1000 kg/m3
  • kinematic viscosity of the liquid in the settling chamber = 10-6 m2/s
Assuming laminar conditions, the settling velocity (in mm/s, up to one decimal place) is _______.


21.1 is the correct answer.


Ques 63 Civil

The wastewater having an organic concentration of 54 mg/l is flowing at a steady rate of 0.8 m3/day through a detention tank of dimensions 2 m x 4 m x 2 m. If the contents of the tank are well mixed and the decay constant is 0.1 per day, the outlet concentration (in mg/l, up to one decimal place) is _______.


18 is the correct answer.


Ques 64 Civil

The bacteria in milk are destroyed when it _______ heated to 80 degree Celsius.

A

would be

B

will be

C

is

D

was



Ques 65 Water

Two wastewater streams A and B, having an identical ultimate BOD are getting mixed to form the stream C. The temperature of the stream A is 20°C and the temperature of the stream C is 10°C. It is given that
• The 5-day BOD of the stream A measured at 20°C=50 mg/l
• BOD rate constant (base 10) at 20°C=0.115 per day
• Temperature coefficient = 1.135
The 5-day BOD (in mg/l, up to one decimal place) of the stream C, calculated at 10°C, is______.


21.21 is the correct answer.


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