Civil Engineering GATE 2020 Set-2 Questions with Answer

Ques 40 Civil

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Joints I, J, K, L, Q and M of the frame shown in the figure (not drawn to the scale) are pins. Continuous members IQ and LJ are connected through a pin at N. Continuous members JM and KQ are connected through a pin at P. The frame has hinge supports at joints R and S. The loads acting at joints I, J and K are along the negative Y direction and the loads acting at joints L and M are along the positive X direction.

The magnitude of the horizontal component of reaction (in kN) at S, is

A

5

B

10

C

15

D

20

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Ques 41 Civil

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The flow-density relationship of traffic on a highway is shown in the figure. The correct representation of speed-density relationship of the traffic on this highway is

A

B

C

D

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Ques 42 Civil

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Group-I gives a list of test methods for evaluating properties of aggregates. Group-II gives the list of properties to be evaluated.

The correct match of test methods under Group-I to properties under Group-II, is

A

P-4; Q-1; R-2; S-3

B

P-2; Q-1; R-4; S-3

C

P-3; Q-4; R-1; S-2

D

P-2; Q-4; R-3; S-1

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Ques 43 Civil

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For the hottest month of the year at the proposed airport site, the monthly mean of the average daily temperature is 39°C. The monthly mean of the maximum daily temperature is 48°C for the same month of the year. From the given information, the calculated Airport Reference Temperature (in °C) is

A

36

B

39

C

42

D

48

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Ques 44 Civil

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Permeability tests were carried out on the samples collected from two different layers as shown in the figure (not drawn to the scale). The relevant horizontal (kh) and vertical (kv) coefficients of permeability are indicated for each layer.

The ratio of the equivalent horizontal to vertical coefficients of permeability, is

A

37.29

B

80.20

C

68.25

D

0.03

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Ques 45 Civil

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A 10 m high slope of dry clay soil (unit weight = 20 kN/m³), with a slope angle of 45° and the circular slip surface, is shown in the figure (not drawn to the scale). The weight of the slip wedge is denoted by W. The undrained unit cohesion (cu) is 60 kPa.

The factor of safety of the slope against slip failure, is

A

1.84

B

1.57

C

0.58

D

1.67

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Ques 46 Civil

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Crops are grown in a field having soil, which has field capacity of 30% and permanent wilting point of 13%. The effective depth of root zone is 80 cm. Irrigation water is supplied when the average soil moisture drops to 20%. Consider density of the soil as 1500 kg/m³ and density of water as 1000 kg/m³. If the daily consumptive use of water for the crops is 2 mm, the frequency of irrigating the crops (in days), is

A

7

B

10

C

11

D

13

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Ques 47 Civil

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Alkalinity of water, in equivalent/litre (eq/litre), is given by

Where, {} represents concentration in mol/litre. For a water sample, the concentrations of HCO₃^- = 2 × 10^-3 mol/litre, CO₃^2- = 3.04 × 10^-4 mol/litre and the pH of water = 9.0. The atomic weights are: Ca = 40; C = 12 and O = 16. If the concentration of OH^- and H⁺ are NEGLECTED, the alkalinity of the water sample (in mg/litre as CaCO₃), is

A

130.4

B

100.0

C

50.0

D

65.2

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Ques 48 Civil

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A theodolite was set up at a station P. The angle of depression to a vane 2 m above the foot of a staff held at another station Q was 45°. The horizontal distance between stations P and Q is 20 m. The staff reading at a benchmark S of RL 433.050 m is 2.905 m. Neglecting the errors due to curvature and refraction, the RL of the station Q (in m), is

A

413.050

B

413.955

C

431.050

D

435.955

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Ques 49 Civil

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The Fourier series to represent x - x² for -π ≤ x ≤ π is given by

. The value of a₀ (round off to two decimal places), is _______.

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Ques 50 Civil

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The diameter and height of a right circular cylinder are 3 cm and 4 cm, respectively. The absolute error in each of these two measurements is 0.2 cm. The absolute error in the computed volume (in cm³, round off to three decimal places), is _______.

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Ques 51 Civil

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A concrete beam of span 15 m, 150 mm wide and 350 mm deep is prestressed with a parabolic cable as shown in the figure (not drawn to the scale). Coefficient of friction for the cable is 0.35, and coefficient of wave effect is 0.0015 per meter.

If the cable is tensioned from one end only, the percentage loss (round off to one decimal place) in the cable force due to friction, is _______.

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Ques 52 Civil

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The plane truss has hinge supports at P and W and is subjected to the horizontal forces as shown in the figure (not drawn to the scale).

Representing the tensile force with + sign and the compressive force with - sign, the force in member XW (in kN, round off to the nearest integer), is _______.

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