Civil Engineering Gate Yearwise 

Civil Engineering GATE 2017 Set-1 Questions with Answer

Ques 40 Civil

A 1 m wide rectangular channel has a bed slope of 0.0016 and the Manning's roughness coefficient is 0.04. Uniform flow takes place in the channel at a flow depth of 0.5 m. At a particular section, gradually varied flow (GVF) is observed and the flow depth is measured as 0.6 m. The GVF profile at that section is classified as

A

S1

B

S2

C

M1

D

M2



Ques 41 Civil

The following observations are made while testing aggregate for its suitability in pavement construction:
i. Mass of oven-dry aggregate in air = 1000 g
ii. Mass of saturated surface-dry aggregate in air = 1025 g
iii. Mass of saturated surface-dry aggregate under water = 625 g
Based on the above observations, the correct statement is

A

bulk specific gravity of aggregate = 2.5 and water absorption = 2.5%

B

bulk specific gravity of aggregate = 2.5 and water absorption = 2.4%

C

apparent specific gravity of aggregate = 2.5 and water absorption = 2.5%

D

apparent specific gravity of aggregate = 2.5 and water absorption = 2.4%



Ques 42 Civil

The queue length (in number of vehicles) versus time (in seconds) plot for an approach to a signalized intersection with the cycle length of 96 seconds is shown in the figure (not drawn to scale).

At time t = 0, the light has just turned red. The effective green time is 36 seconds, during which vehicles discharge at the saturation flow rate, s (in vph). Vehicles arrive at a uniform rate, v (in vph), throughout the cycle. Which one of the following statements is TRUE?

A

v = 600 vph, and for this cycle, the average stopped delay per vehicle = 30 seconds

B

s = 1800 vph, and for this cycle, the average stopped delay per vehicle = 28.125 seconds

C

v = 600 vph, and for this cycle, the average stopped delay per vehicle = 45 seconds

D

s = 1200 vph, and for this cycle, the average stopped delay per vehicle = 28.125 seconds



Ques 43 Civil

The radius of a horizontal circular curve on a highway is 120 m. The design speed is 60 km/hour, and the design coefficient of lateral friction between the tyre and the road surface is 0.15. The estimated value of superelevation required (if full lateral friction is assumed to develop), and the value of coefficient of friction needed (if no superelevation is provided) will, respectively, be

A

1/11.6 and 0.10

B

1/10.5 and 0.37

C

1/11.6 and 0.24

D

1/12.9 and 0.24



Ques 44 Civil

The observed bearings of a traverse are given below:

The station(s) most likely to be affected by the local attraction is/are

A

Only R

B

Only S

C

R and S

D

P and Q



Ques 45 Civil

The laboratory tests on a soil sample yields the following results: natural moisture content = 18%, liquid limit = 60%, plastic limit = 25%, percentage of clay sized fraction = 25%. The liquidity index and activity (as per the expression proposed by Skempton) of the soil, respectively, are

A

-0.2 and 1.4

B

0.2 and 1.4

C

-1.2 and 0.714

D

1.2 and 0.714



Ques 46 Civil

Consider the equation du/dt = 3t2 + 1 with u = 0 at t = 0. This is numerically solved by using the forward Euler method with a step size, Δt = 2. The absolute error in the solution at the end of the first time step is _______.


8 is the correct answer.


Ques 47 Civil

A pre-tensioned rectangular concrete beam 150 mm wide and 300 mm depth is prestressed with three straight tendons, each having a cross-sectional area of 50 mm2, to an initial stress of 1200 N/mm2. The tendons are located at 100 mm from the soffit of the beam. If the modular ratio is 6, the loss of prestressing force (in kN, up to one decimal place) due to the elastic deformation of concrete only is _______.


4.7 is the correct answer.


Ques 48 Civil

Consider the stepped bar made with a linear elastic material and subjected to an axial load of 1 kN, as shown in the figure.

Segments 1 and 2 have cross-sectional area of 100 mm2 and 60 mm2, Young's modulus of 2 x 105 MPa and 3 x 105 MPa, and length of 400 mm and 900 mm, respectively. The strain energy (in N-mm, up to one decimal place) in the bar due to the axial load is _______.


35 is the correct answer.


Ques 49 Civil

The value of M in the beam ABC shown in the figure is such that the joint B does not rotate.

The value of support reaction (in kN) at B should be equal to _______.


60 is the correct answer.


Ques 50 Civil

Consider the beam ABCD shown in the figure.

For a moving concentrated load of 50 kN on the beam, the magnitude of the maximum bending moment (in kN-m) obtained at the support C will be equal to _______.


200 is the correct answer.


Ques 51 Civil

Consider two axially loaded columns, namely, 1 and 2, made of a linear elastic material with Young's modulus 2 x 105 MPa, square cross-section with side 10 mm, and length 1 m. For Column 1, one end is fixed and the other end is free. For Column 2, one end is fixed and the other end is pinned. Based on the Euler's theory, the ratio (up to one decimal place) of the buckling load of Column 2 to the buckling load of Column 1 is _______.


8 is the correct answer.


Ques 52 Civil

A column is subjected to a load through a bracket as shown in the figure.

The resultant force (in kN, up to one decimal place) in the bolt 1 is _______.


6 is the correct answer.


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